Term IRI Term label Parent term IRI Parent term label Alternative term Definition http://purl.obolibrary.org/obo/DDANAT_0000106 apical disc http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision Most apical structure of the organism. http://purl.obolibrary.org/obo/DDANAT_0000107 upper cup http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision Region located above the spore mass and composed of anterior-like cells. http://purl.obolibrary.org/obo/DDANAT_0000030 prestalk A region of the migratory slug http://purl.obolibrary.org/obo/DDANAT_0000088 prestalk A region Anterior-most region of the prestalk zone of the migratory slug and characterized by high expression of the ecmA gene directed by the proximal part of its promoter (ecmA promoter). http://purl.obolibrary.org/obo/DDANAT_0000033 prespore region of the migratory slug http://purl.obolibrary.org/obo/DDANAT_0000086 prespore region Region of the migratory slug composed mostly of prespore cells. In addition to prespore cells, the prespore region contains anterior-like cells (ALC) that express ecmA and/or ecmB. The prespore region occupies about three quarters of the organism. http://purl.obolibrary.org/obo/DDANAT_0000047 surface sheath of the early culminant http://purl.obolibrary.org/obo/DDANAT_0000096 surface sheath Acellular material composed of polysaccharides and proteins that holds the cell mass together in the early culminant. http://purl.obolibrary.org/obo/DDANAT_0000048 prestalk region of the mid culminant http://purl.obolibrary.org/obo/DDANAT_0000087 prestalk region The prestalk region of the mid culminant is located at the most apical part of the organism. It consists of about one quarter of the cells. http://purl.obolibrary.org/obo/DDANAT_0000049 prestalk A region of the mid culminant http://purl.obolibrary.org/obo/DDANAT_0000088 prestalk A region Anterior-most region of the prestalk zone of the mid culminant characterized by high expression of the ecmA gene directed by the proximal part of its promoter (ecmA promoter). http://purl.obolibrary.org/obo/DDANAT_0000056 prespore/base region of the mid culminant http://purl.obolibrary.org/obo/DDANAT_0000110 basal region Region of the prespore zone of the mid culminant that borders the base. http://purl.obolibrary.org/obo/DDANAT_0000062 apical disc of the late culminant http://purl.obolibrary.org/obo/DDANAT_0000106 apical disc Most apical structure of the late culminant. Composed of cells that express the prestalk markers ecmA, ecmB and staB. http://purl.obolibrary.org/obo/DDANAT_0000069 stalk tube of the fruiting body http://purl.obolibrary.org/obo/DDANAT_0000097 stalk tube Open, cylindrical tube of the fruiting body composed of cellulose and glycoprotein and surrounded by a ring of actin in which stalk cells accumulate. http://purl.obolibrary.org/obo/DDANAT_0000071 apical disc of the fruiting body http://purl.obolibrary.org/obo/DDANAT_0000106 apical disc Region of the fruiting body located above the spore mass and composed of anterior-like cells. http://purl.obolibrary.org/obo/DDANAT_0000072 lower cup of the fruiting body http://purl.obolibrary.org/obo/DDANAT_0000105 lower cup Region of the fruiting body located at the base of the sorus and composed of anterior-like cells. http://purl.obolibrary.org/obo/DDANAT_0000079 surface sheath of the fruiting body http://purl.obolibrary.org/obo/DDANAT_0000096 surface sheath Acellular material composed of polysaccharides and proteins. In the fruiting body, covers only the basal disc. http://purl.obolibrary.org/obo/DDANAT_0000092 prestalk O region http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision Area of the prestalk zone located posterior to the pstA region and characterized by low expression of the ecmA gene directed by the distal part of its promoter (ecmO promoter). http://purl.obolibrary.org/obo/DDANAT_0000097 stalk tube http://purl.obolibrary.org/obo/DDANAT_0010081 acellular anatomical structure Open, cylindrical tube that appears during culmination. The stalk tube is composed of cellulose and glycoprotein and surrounded by a ring of actin in which stalk cells accumulate. http://purl.obolibrary.org/obo/DDANAT_0000102 prestalk O region of the tipped mound http://purl.obolibrary.org/obo/DDANAT_0000092 prestalk O region Area of the prestalk zone of the tipped mound located posterior to the pstA region and characterized by low expression of the ecmA gene directed by the distal part of its promoter (ecmO promoter). http://purl.obolibrary.org/obo/DDANAT_0000405 prespore cell http://purl.obolibrary.org/obo/DDANAT_0000401 cell Cell that is undergoing differentiation to become a spore. Characterized by the presence of prespore vesicles (PV). http://purl.obolibrary.org/obo/DDANAT_0000406 prestalk cell http://purl.obolibrary.org/obo/DDANAT_0000401 cell Cell that is undergoing differentiation to become a stalk cell and characterized by the ability to update vital dyes. Represents about one-quarter of the cells. During development, prestalk cells are located in the anterior portion of the organism. http://purl.obolibrary.org/obo/DDANAT_0000407 pstO cell http://purl.obolibrary.org/obo/DDANAT_0000406 prestalk cell Cell that is undergoing differentiation to become a stalk cell. pstO cells express ecmA at a very low level and are located at the posterior half of the prestalk zone. Expresses ecmA from the distal region of its promoter (ecmO). http://purl.obolibrary.org/obo/DDANAT_0000409 rearguard cell http://purl.obolibrary.org/obo/DDANAT_0000404 anterior like cell Cell expressing ecmB but not ecmA. Rearguard cells are located at the very rear of the slug (rearguard region). These cells form the outer basal disc of the fruiting body. If a migratory slug is formed, these cells are left behind. http://purl.obolibrary.org/obo/DDANAT_0000415 aspidocyte http://purl.obolibrary.org/obo/DDANAT_0000083 Dictyostelium discoideum single cell organism Cell type formed in the presence of toxins. The membrane of the aspidocyte is highly resistant to detergents. http://purl.obolibrary.org/obo/DDANAT_0000084 macrocyst http://purl.obolibrary.org/obo/DDANAT_0000083 Dictyostelium discoideum single cell organism Unicellular diploid organism resulting from the fusion of two cells of opposite mating types. http://purl.obolibrary.org/obo/DDANAT_0000109 apex of the mound http://purl.obolibrary.org/obo/DDANAT_0000111 apex Apical region of the mound where cAMP signals originate that trigger positive chemotaxis from pstA and pstO cells. http://purl.obolibrary.org/obo/DDANAT_0000410 pstAB cell http://purl.obolibrary.org/obo/DDANAT_0000406 prestalk cell Cell that is undergoing differentiation to become a stalk cell. pstAB cells express both ecmA and ecmB either simultaneously or sequentially. During culmination pstA differentiate into pstAB cells. http://purl.obolibrary.org/obo/DDANAT_0000083 Dictyostelium discoideum single cell organism http://purl.obolibrary.org/obo/DDANAT_0000401 cell Cell that is an individual member of the species Dictyostelium discoideum. http://purl.obolibrary.org/obo/DDANAT_0000112 spore coat http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision A tri-layer protective wall around each spore, consisting of secreted proteins, a polysaccharide, and cellulose produced on the cell surface. http://purl.obolibrary.org/obo/DDANAT_0000101 prestalk AB core region of the tipped mound http://purl.obolibrary.org/obo/DDANAT_0000091 prestalk AB core region Cone-shaped area of the prestalk zone of the tipped mound that occupies a core among the pstA region. Cells of the pstAB region express both the ecmA and ecmB genes. http://purl.obolibrary.org/obo/DDANAT_0000412 pstO/ALC http://purl.obolibrary.org/obo/DDANAT_0000404 anterior like cell Anterior-like cell that expresses the ecmO promoter and that can move to the position normally occupied by the pstO cells. http://purl.obolibrary.org/obo/DDANAT_0001000 pstU/ALC http://purl.obolibrary.org/obo/DDANAT_0000404 anterior like cell Anterior-like cell that expresses the rtaA promoter but not ecmA, ecmB or the ecmO promoter. http://purl.obolibrary.org/obo/DDANAT_0010082 whole organism http://purl.obolibrary.org/obo/DDANAT_0010001 Dictyostelium discoideum anatomical structure Anatomical structure that is an individual member of the Dictyostelium discoideum species and consists of more than one cell. http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision http://purl.obolibrary.org/obo/DDANAT_0010001 Dictyostelium discoideum anatomical structure Anatomical structure which is a primary subdivision of whole Dictyostelium organism. The mereological sum of these is the whole organism. http://purl.obolibrary.org/obo/DDANAT_0000095 peripheral layer cell http://purl.obolibrary.org/obo/DDANAT_0000401 cell Electron-dense cell connected to neighboring peripheral layer cells thus forming a coherent tissue around the multicellular organism. http://purl.obolibrary.org/obo/DDANAT_0000013 stream http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision Macroscopic appearance of groups of chemotactic cells orienting themselves in a head to tail fashion as they are migrating in the direction of the chemotactic stimulus to form aggregates. http://purl.obolibrary.org/obo/DDANAT_0000015 surface sheath of the mound http://purl.obolibrary.org/obo/DDANAT_0000096 surface sheath Acellular material composed of polysaccharides and proteins that holds the cell mass together in the mound. http://purl.obolibrary.org/obo/DDANAT_0000029 tip-organizer of the migratory slug http://purl.obolibrary.org/obo/DDANAT_0000103 tip-organizer Part of the prestalk region of the migratory slug that acts as an organizer, that is, a signalling center that directs the morphological characteristics of the entire organism. The tip guides the movement of the organism during migration. http://purl.obolibrary.org/obo/DDANAT_0000031 prestalk O region of the migratory slug http://purl.obolibrary.org/obo/DDANAT_0000092 prestalk O region Area of the prestalk zone of the migratory slug located posterior to the prestalk A region and characterized by low expression of the ecmA gene directed by the distal part of its promoter (ecmO promoter). http://purl.obolibrary.org/obo/DDANAT_0000032 prestalk AB core region of the migratory slug http://purl.obolibrary.org/obo/DDANAT_0000091 prestalk AB core region Cone-shaped area of the prestalk zone of the migratory slug that occupies a core among the pstA region. Cells of the pstAB region express both the ecmA and ecmB genes. http://purl.obolibrary.org/obo/DDANAT_0000105 lower cup http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision Region located at the base of the sorus and composed of anterior-like cells. http://purl.obolibrary.org/obo/DDANAT_0001001 pstU cell http://purl.obolibrary.org/obo/DDANAT_0000406 prestalk cell Cell that is undergoing differentiation to become a stalk cell. pstU cells express the rtaA marker and preferentially populate the upper cup region during culmination. http://purl.obolibrary.org/obo/DDANAT_0000053 stalk tube of the mid culminant http://purl.obolibrary.org/obo/DDANAT_0000097 stalk tube Open, cylindrical tube of the mid culminant composed of cellulose and glycoprotein and surrounded by a ring of actin in which stalk cells accumulate. http://purl.obolibrary.org/obo/DDANAT_0000002 vegetative amoebae http://purl.obolibrary.org/obo/DDANAT_0000083 Dictyostelium discoideum single cell organism Unicellular haploid myxamoebae that feeds on bacteria by phagocytosis and divides by binary fission. The size of vegetative cells range from 12-20 microns by 8-12 microns. The cells exhibit a roughly rounded but rather irregular shape. http://purl.obolibrary.org/obo/DDANAT_0000014 surface sheath of the loose aggregate http://purl.obolibrary.org/obo/DDANAT_0000096 surface sheath Acellular material composed of polysaccharides and proteins, formed during late aggregation and that holds the cell mass together in the aggregate. http://purl.obolibrary.org/obo/DDANAT_0000018 surface sheath of the tipped mound http://purl.obolibrary.org/obo/DDANAT_0000096 surface sheath Acellular material composed of polysaccharides and proteins that holds the cell mass together in the tipped mound. http://purl.obolibrary.org/obo/DDANAT_0000022 prestalk O region of the standing slug http://purl.obolibrary.org/obo/DDANAT_0000092 prestalk O region Area of the prestalk zone of the standing slug located posterior to the prestalk A region and characterized by low expression of the ecmA gene directed by the distal part of its promoter (ecmO promoter). http://purl.obolibrary.org/obo/DDANAT_0000023 prestalk AB core region of the standing slug http://purl.obolibrary.org/obo/DDANAT_0000091 prestalk AB core region Cone-shaped area of the prestalk zone of the standing slug that occupies a core among the pstA region. Cells of the pstAB region express both the ecmA and ecmB genes. http://purl.obolibrary.org/obo/DDANAT_0000027 surface sheath of the standing slug http://purl.obolibrary.org/obo/DDANAT_0000096 surface sheath Acellular material composed of polysaccharides and proteins that holds the cell mass together in the standing slug. http://purl.obolibrary.org/obo/DDANAT_0000028 prestalk region of the migratory slug http://purl.obolibrary.org/obo/DDANAT_0000087 prestalk region The prestalk region of the migratory slug is located at the anterior of the organism. It consists of about one quarter of the cells. http://purl.obolibrary.org/obo/DDANAT_0000034 posterior region of the migratory slug http://purl.obolibrary.org/obo/DDANAT_0000108 posterior region Region located at the very posterior of the migratory slug that contains pstB cells (rearguard cells). These cells form the basal disc in the mature fruiting body. http://purl.obolibrary.org/obo/DDANAT_0000036 surface sheath of the migratory slug http://purl.obolibrary.org/obo/DDANAT_0000096 surface sheath Acellular material composed of polysaccharides and proteins that holds the cell mass together in the migratory slug. http://purl.obolibrary.org/obo/DDANAT_0000037 prestalk region of the early culminant http://purl.obolibrary.org/obo/DDANAT_0000087 prestalk region The prestalk region of the early culminant is located at the most apical part of the organism. It consists of about one quarter of the cells. http://purl.obolibrary.org/obo/DDANAT_0000038 prestalk A region of the early culminant http://purl.obolibrary.org/obo/DDANAT_0000088 prestalk A region Anterior-most region of the prestalk zone of the early culminant characterized by high expression of the ecmA gene directed by the proximal part of its promoter (ecmA promoter). http://purl.obolibrary.org/obo/DDANAT_0000044 prespore/base region of the early culminant http://purl.obolibrary.org/obo/DDANAT_0000110 basal region Region of the prespore zone of the early culminant that borders the base. This region gives rise to the lower cup of the fruiting body. http://purl.obolibrary.org/obo/DDANAT_0000045 basal region of the early culminant http://purl.obolibrary.org/obo/DDANAT_0000110 basal region Region of the early culminant located at the closest to the substratum composed of pstB cells that originated from rearguard cells. http://purl.obolibrary.org/obo/DDANAT_0000046 peripheral layer of the early culminant http://purl.obolibrary.org/obo/DDANAT_0000090 peripheral layer Layer surrounding the mexican hat and composed of an electron-dense cell type. http://purl.obolibrary.org/obo/DDANAT_0000050 prestalk O region of the mid culminant http://purl.obolibrary.org/obo/DDANAT_0000092 prestalk O region Area of the prestalk zone of the mid culminant located posterior to the prestalk A region and characterized by low expression of the ecmA gene directed by the distal part of its promoter (ecmO promoter). http://purl.obolibrary.org/obo/DDANAT_0000051 prestalk AB core region of the mid culminant http://purl.obolibrary.org/obo/DDANAT_0000091 prestalk AB core region Cone-shaped area of the prestalk zone of the mid culminant that occupies a core among the pstA region. Cells of the pstAB region express both the ecmA and ecmB genes. http://purl.obolibrary.org/obo/DDANAT_0000052 stalk of the mid culminant http://purl.obolibrary.org/obo/DDANAT_0000093 stalk Tubular structure of the mid culminant that consists of cellulose-covered cells stacked on top of each other and surrounded by an acellular stalk tube composed of cellulose and glycoprotein. http://purl.obolibrary.org/obo/DDANAT_0000055 upper cup region of the mid culminant http://purl.obolibrary.org/obo/DDANAT_0000107 upper cup Region of the prespore zone of the mid culminant that borders the prestalk region. http://purl.obolibrary.org/obo/DDANAT_0000057 basal disc of the mid culminant http://purl.obolibrary.org/obo/DDANAT_0000089 basal disc Region located of the mid culminant located closest to the substratum and composed of pst cells (rearguard cells). http://purl.obolibrary.org/obo/DDANAT_0000058 peripheral layer of the mid culminant http://purl.obolibrary.org/obo/DDANAT_0000090 peripheral layer Layer surrounding the mid culminant and composed of an electron-dense cell type. http://purl.obolibrary.org/obo/DDANAT_0000059 stalk of the late culminant http://purl.obolibrary.org/obo/DDANAT_0000093 stalk Tubular structure of the late culminant that consists of cellulose-covered cells stacked on top of each other and surrounded by an acellular stalk tube composed of cellulose and glycoprotein. http://purl.obolibrary.org/obo/DDANAT_0000060 stalk tube of the late culminant http://purl.obolibrary.org/obo/DDANAT_0000097 stalk tube Open, cylindrical tube of the late culminant composed of cellulose and glycoprotein and surrounded by a ring of actin in which stalk cells accumulate. http://purl.obolibrary.org/obo/DDANAT_0000061 sorus of the late culminant http://purl.obolibrary.org/obo/DDANAT_0000094 sorus Ovoid structure of the late culminant supported by the stalk and that contains the spores. http://purl.obolibrary.org/obo/DDANAT_0000064 lower cup of the late culminant http://purl.obolibrary.org/obo/DDANAT_0000105 lower cup Region of the sorus of the late culminant located at the base of the sorus and composed of anterior-like cells. http://purl.obolibrary.org/obo/DDANAT_0000067 outer basal disc of the late culminant http://purl.obolibrary.org/obo/DDANAT_0000099 outer basal disc Ring of cells at the periphery of the basal disc of the late culminant. Composed of pstB cells (rearguard cells) and other anterior-like cells. http://purl.obolibrary.org/obo/DDANAT_0000068 stalk of the fruiting body http://purl.obolibrary.org/obo/DDANAT_0000093 stalk Tubular structure of the fruiting body that consists of cellulose-covered cells stacked on top of each other and surrounded by an acellular stalk tube composed of cellulose and glycoprotein. The stalk of the mature fruiting body is usually 5-15 microns in diameter and between 1.5 to 3 cm in height. http://purl.obolibrary.org/obo/DDANAT_0000070 sorus of the fruiting body http://purl.obolibrary.org/obo/DDANAT_0000094 sorus Structure of the fruiting body supported by the stalk and that contains the spores. The sorus is 125-300 microns in diameter, lemon-shaped, and grayish white to pale yellow in color. http://purl.obolibrary.org/obo/DDANAT_0000075 outer basal disc of the fruiting body http://purl.obolibrary.org/obo/DDANAT_0000099 outer basal disc Ring of cells at the periphery of the basal disc of the fruiting body composed of pstB cells (rearguard cells) and other anterior-like cells. http://purl.obolibrary.org/obo/DDANAT_0000076 slime trail http://purl.obolibrary.org/obo/DDANAT_0010081 acellular anatomical structure Acellular material from the surface sheath left behind the migratory slug as it moves. Can be up to 2-3 cm in length. http://purl.obolibrary.org/obo/DDANAT_0000078 surface sheath of the late culminant http://purl.obolibrary.org/obo/DDANAT_0000096 surface sheath Acellular material composed of polysaccharides and proteins. In the late culminant, covers only the basal disc. http://purl.obolibrary.org/obo/DDANAT_0000080 tip-organizer of the tipped mound http://purl.obolibrary.org/obo/DDANAT_0000103 tip-organizer Part of the prestalk region of the tipped mound that acts as an organizer, that is, a signalling center that directs the morphological characteristics of the entire organism. http://purl.obolibrary.org/obo/DDANAT_0000110 basal region http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision Region of the early pseudoplasmodium located at the closest to the substratum composed of pstB cells. http://purl.obolibrary.org/obo/DDANAT_0000003 aggregation territory http://purl.obolibrary.org/obo/DDANAT_0010082 whole organism Area covered by a group of chemotactic cells converging toward the same aggregation center. Can reach a diameter of up to 1 cm. http://purl.obolibrary.org/obo/DDANAT_0000004 loose aggregate http://purl.obolibrary.org/obo/DDANAT_0010082 whole organism First adherent mass of cells observed during development, relatively flat with indistinct borders. http://purl.obolibrary.org/obo/DDANAT_0000005 mound http://purl.obolibrary.org/obo/DDANAT_0010082 whole organism Hemispherical structure composed of post-aggregative cells that are undergoing differentiation. http://purl.obolibrary.org/obo/DDANAT_0000006 tipped mound http://purl.obolibrary.org/obo/DDANAT_0010082 whole organism Hemispherical structure composed of post-aggregative cells that are undergoing differentiation and that have formed a tip. http://purl.obolibrary.org/obo/DDANAT_0000007 standing slug http://purl.obolibrary.org/obo/DDANAT_0010082 whole organism Cylindrical structure that is formed by elongation of the mound under the control of the tip. The elongating tip is called the first finger. http://purl.obolibrary.org/obo/DDANAT_0000008 migratory slug http://purl.obolibrary.org/obo/DDANAT_0010082 whole organism When the conditions are not optimal for the completion of development, the standing slug bends from a vertical position to a horizontal position, producing a migratory that slug has the ability to migrate towards more favorable environmental conditions. The slug is cylindrical in shape with a rounded, tapering region at its anterior end that is raised with respect to the substratum. It usually measures between 0.8 to 1.2 mm in length with a diameter of 0.15 to 0.25 mm. Slugs sense and respond to light, temperature and acidity, and do not enter culmination until the conditions are optimal. The slug can move at a speed of 0.5 to 2 mm per hour. A trail of slime is deposited on the surface during migration. http://purl.obolibrary.org/obo/DDANAT_0000009 early culminant http://purl.obolibrary.org/obo/DDANAT_0010082 whole organism Structure formed after the arrest of slug migration formed when cells of the posterior region of the slug move under the tip. Stalk tube formation is initiated at this stage. http://purl.obolibrary.org/obo/DDANAT_0000010 mid culminant http://purl.obolibrary.org/obo/DDANAT_0010082 whole organism Structure in which stalk tube formation has progressed down the prespore zone. Basal disc formation begins at this stage, with the migration of pstA and pstB cells to the lower part of the culminant to form the basal disc. http://purl.obolibrary.org/obo/DDANAT_0000011 late culminant http://purl.obolibrary.org/obo/DDANAT_0010082 whole organism Structure in which stalk tube formation has progressed down to the basal disc. The sorogen ascents up the stalk to it apical position during this stage. Terminal differentiation occurs at this stage: death of the stalk cells and encapsulation of the spores. http://purl.obolibrary.org/obo/DDANAT_0000093 stalk http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision Tubular structure that consists of cellulose-covered cells stacked on top of each other and surrounded by an acellular stalk tube composed of cellulose and glycoprotein. http://purl.obolibrary.org/obo/DDANAT_0000414 spore http://purl.obolibrary.org/obo/DDANAT_0000083 Dictyostelium discoideum single cell organism Dormant cell protected by a tri-layer spore coat. The spore has an elliptical shape and is approximately 6-9 microns by 3 microns. http://purl.obolibrary.org/obo/DDANAT_0000411 pstAB/ALC http://purl.obolibrary.org/obo/DDANAT_0000404 anterior like cell Anterior-like cell expressing both ecmA and ecmB. http://purl.obolibrary.org/obo/DDANAT_0000065 basal disc of the late culminant http://purl.obolibrary.org/obo/DDANAT_0000089 basal disc Conical-shaped structure of the late culminant that anchors the stalk to the substratum. Composed of anterior-like cells. http://purl.obolibrary.org/obo/DDANAT_0000104 tip-organizer of the early culminant http://purl.obolibrary.org/obo/DDANAT_0000103 tip-organizer Part of the prestalk region of the early culminant that acts as an organizer, that is, a signalling center that directs the morphological characteristics of the entire organism. http://purl.obolibrary.org/obo/DDANAT_0000401 cell http://purl.obolibrary.org/obo/DDANAT_0010001 Dictyostelium discoideum anatomical structure Anatomical structure that has as its parts a maximally connected cell compartment surrounded by a plasma membrane. http://purl.obolibrary.org/obo/DDANAT_0000402 chemotactic amoeboid cell http://purl.obolibrary.org/obo/DDANAT_0000083 Dictyostelium discoideum single cell organism Starved cell that secretes and responds to chemoattractants (cAMP). http://purl.obolibrary.org/obo/DDANAT_0000403 aggregate cell http://purl.obolibrary.org/obo/DDANAT_0000401 cell Differentiating cell composing the aggregate that has acquired adhesive properties. http://purl.obolibrary.org/obo/DDANAT_0000413 stalk cell http://purl.obolibrary.org/obo/DDANAT_0000401 cell Cell of polyhedric shape filling the stalk tube. Stack cells are large (around 8 microns in diameter), highly vacuolated, and are surrounded by cell wall composed of cellulose. Stalk cells die upon terminal differentiation. Their role is to provide structural support for the fruiting body. http://purl.obolibrary.org/obo/DDANAT_0000417 pstB cell http://purl.obolibrary.org/obo/DDANAT_0000406 prestalk cell Cell that is undergoing differentiation to become a stalk cell. pstB cells express the ecmB marker and form the outer basal disc in the fruiting body. http://purl.obolibrary.org/obo/DDANAT_0000089 basal disc http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision Conical-shaped structure that anchors the stalk to the substratum. Composed of anterior-like cells. http://purl.obolibrary.org/obo/DDANAT_0000404 anterior like cell http://purl.obolibrary.org/obo/DDANAT_0000401 cell Cell that has properties of anterior cells (for e.g., accumulate vital dyes in autophagic vesicles) but that is are scattered throughout the rear of the slug. Some but not all these cells express the ecmA gene and/or the ecmB gene. ALCs maintain an amoeboid appearance during culmination. ALCs that express the ecmO promoter have been called pstO/ALC. http://purl.obolibrary.org/obo/DDANAT_0000042 upper cup region of the early culminant http://purl.obolibrary.org/obo/DDANAT_0000107 upper cup Region of the prespore zone of the early culminant that borders the prestalk region. This region gives rise to the upper cup of the fruiting body. http://purl.obolibrary.org/obo/DDANAT_0000016 prestalk region of the tipped mound http://purl.obolibrary.org/obo/DDANAT_0000087 prestalk region Elongated protusion of the tipped mound located on top of the cell mass that contains pstA cells flanked by pstO cells (expressing ecmA from the proximal and the distal part of its promoter, respectively). http://purl.obolibrary.org/obo/DDANAT_0000017 prespore region of the tipped mound http://purl.obolibrary.org/obo/DDANAT_0000086 prespore region Region of the tipped mound mostly composed of prespore cells. In addition to prespore cells, the prespore region contains anterior-like cells (ALC) that express ecmA and/or ecmB. http://purl.obolibrary.org/obo/DDANAT_0000019 prestalk region of the standing slug http://purl.obolibrary.org/obo/DDANAT_0000087 prestalk region Elongated protrusion of the standing slug located on top of the cell mass that contains pstA cells flanked by pstO cells (expressing ecmA from the proximal and the distal part of its promoter, respectively). http://purl.obolibrary.org/obo/DDANAT_0000020 tip-organizer of the standing slug http://purl.obolibrary.org/obo/DDANAT_0000103 tip-organizer Part of the prestalk region of the standing slug that acts as an organizer, that is, a signalling center that directs the morphological characteristics of the entire organism. http://purl.obolibrary.org/obo/DDANAT_0000021 prestalk A region of the standing slug http://purl.obolibrary.org/obo/DDANAT_0000088 prestalk A region Most apical region of the prestalk zone of the standing slug characterized by high expression of the ecmA gene directed by the proximal part of its promoter (ecmA promoter). http://purl.obolibrary.org/obo/DDANAT_0000024 prespore region of the standing slug http://purl.obolibrary.org/obo/DDANAT_0000086 prespore region Region of the standing slug mostly composed of prespore cells. In addition to prespore cells, the prespore region contains anterior-like cells (ALC) that express ecmA and/or ecmB. The prespore region occupies about three quarters of the organism. http://purl.obolibrary.org/obo/DDANAT_0000026 peripheral layer of the standing slug http://purl.obolibrary.org/obo/DDANAT_0000090 peripheral layer Outer-most cell layer surrounding the standing slug. The peripheral layer is composed of electron-dense cells that are connected to each other, forming a coherent tissue. http://purl.obolibrary.org/obo/DDANAT_0000077 surface sheath of the mid culminant http://purl.obolibrary.org/obo/DDANAT_0000096 surface sheath Acellular material composed of polysaccharides and proteins. Covers the basal disc of the mid culminant. http://purl.obolibrary.org/obo/DDANAT_0000103 tip-organizer http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision Part of the prestalk region that acts as an organizer, that is, a signalling center that directs the morphological characteristics of the entire organism. http://purl.obolibrary.org/obo/DDANAT_0000108 posterior region http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision Region located at the very posterior of the organism that contains pstB cells (rearguard cells). These cells form the basal disc in the mature fruiting body. http://purl.obolibrary.org/obo/DDANAT_0000074 inner basal disc of the fruiting body http://purl.obolibrary.org/obo/DDANAT_0000098 inner basal disc Central portion of the basal disc of the fruiting body composed of stalk cells. http://purl.obolibrary.org/obo/DDANAT_0000054 prespore region of the mid culminant http://purl.obolibrary.org/obo/DDANAT_0000086 prespore region Region of the mid culminant mostly composed of prespore cells. In addition to prespore cells, the prespore region contains anterior-like cells (ALC) that express ecmA and/or ecmB. The prespore region occupies about three quarters of the organism. http://purl.obolibrary.org/obo/DDANAT_0000073 basal disc of the fruiting body http://purl.obolibrary.org/obo/DDANAT_0000089 basal disc Conical-shaped structure of the fruiting body that anchors the stalk to the substratum, around 150 to 400 microns in diameter. Composed of anterior-like cells. http://purl.obolibrary.org/obo/DDANAT_0000090 peripheral layer http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision Layer surrounding the pseudoplasmodium and composed of an electron-dense cell type. http://purl.obolibrary.org/obo/DDANAT_0000063 upper cup of the late culminant http://purl.obolibrary.org/obo/DDANAT_0000107 upper cup Region of the late culminant located above the spore mass and composed of anterior-like cells. http://purl.obolibrary.org/obo/DDANAT_0000012 fruiting body http://purl.obolibrary.org/obo/DDANAT_0010082 whole organism Dicty asexual organism which is terminally differentiated and consists of a long stalk on top of which sits the sorus that contains spores. The mature fruiting body measures between 1.5 to 3 mm in height. http://purl.obolibrary.org/obo/DDANAT_0000066 inner basal disc of the late culminant http://purl.obolibrary.org/obo/DDANAT_0000098 inner basal disc Central portion of the basal disc of the late culminant. Composed of stalk cells. http://purl.obolibrary.org/obo/DDANAT_0000086 prespore region http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision Region mostly composed of prespore cells. In addition to prespore cells, the prespore region contains anterior-like cells (ALC) that express ecmA and/or ecmB. The prespore region occupies about three quarters of the organism. http://purl.obolibrary.org/obo/DDANAT_0010081 acellular anatomical structure http://purl.obolibrary.org/obo/DDANAT_0010001 Dictyostelium discoideum anatomical structure Anatomical structure that consists of cell parts and cell substances and together does not constitute a cell or a tissue. http://purl.obolibrary.org/obo/DDANAT_0000035 peripheral layer of the migratory slug http://purl.obolibrary.org/obo/DDANAT_0000090 peripheral layer Outer-most cell layer surrounding the migratory slug. The peripheral layer is composed of electron-dense cells that are connected to each other, forming a coherent tissue. http://purl.obolibrary.org/obo/DDANAT_0000039 prestalk O region of the early culminant http://purl.obolibrary.org/obo/DDANAT_0000092 prestalk O region Area of the prestalk zone of the early culminant located posterior to the pstA region and characterized by low expression of the ecmA gene directed by the distal part of its promoter (ecmO promoter). http://purl.obolibrary.org/obo/DDANAT_0000040 prestalk AB core region of the early culminant http://purl.obolibrary.org/obo/DDANAT_0000091 prestalk AB core region Cone-shaped area of the prestalk zone of the early culminant that occupies a core among the pstA region. Cells of the pstAB region express both the ecmA and ecmB genes. http://purl.obolibrary.org/obo/DDANAT_0000041 prespore region of the early culminant http://purl.obolibrary.org/obo/DDANAT_0000086 prespore region Region of the early culminant mostly composed of prespore cells. In addition to prespore cells, the prespore region contains anterior-like cells (ALC) that express ecmA and/or ecmB. The prespore region occupies about three quarters of the organism. http://purl.obolibrary.org/obo/DDANAT_0000043 stalk tube of the early culminant http://purl.obolibrary.org/obo/DDANAT_0000097 stalk tube Open, cylindrical tube of the early culminant composed of cellulose and glycoprotein and surrounded by a ring of actin in which stalk cells accumulate. http://purl.obolibrary.org/obo/DDANAT_0000087 prestalk region http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision The prestalk region is located at the most apical part of the organism. It consists of about one quarter of the cells. http://purl.obolibrary.org/obo/DDANAT_0000088 prestalk A region http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision Anterior-most region of the prestalk zone characterized by high expression of the ecmA gene directed by the proximal part of its promoter (ecmA promoter). http://purl.obolibrary.org/obo/DDANAT_0000091 prestalk AB core region http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision Cone-shaped area of the prestalk zone that occupies a core among the pstA region. Cells of the pstAB region express both the ecmA and ecmB genes. http://purl.obolibrary.org/obo/DDANAT_0000094 sorus http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision Ovoid structure supported by the stalk and that contains the spores. http://purl.obolibrary.org/obo/DDANAT_0000096 surface sheath http://purl.obolibrary.org/obo/DDANAT_0010081 acellular anatomical structure Acellular material composed of polysaccharides and proteins, formed during late aggregation and that holds the cell mass together throuhout development. http://purl.obolibrary.org/obo/DDANAT_0000098 inner basal disc http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision Central portion of the basal disc. Composed of stalk cells. http://purl.obolibrary.org/obo/DDANAT_0000099 outer basal disc http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision Ring of cells at the periphery of the basal disc composed of pstB cells (rearguard cells) and other anterior-like cells. http://purl.obolibrary.org/obo/DDANAT_0000100 prestalk A region of the tipped mound http://purl.obolibrary.org/obo/DDANAT_0000088 prestalk A region Anterior-most region of the prestalk zone of the tipped mound characterized by high expression of the ecmA gene directed by the proximal part of its promoter (ecmA promoter). http://purl.obolibrary.org/obo/DDANAT_0000408 pstA cell http://purl.obolibrary.org/obo/DDANAT_0000406 prestalk cell Cell that is undergoing differentiation to become a stalk cell. pstA cells express the ecmA marker from a promoter region that is proximal to the ATG (ecmAO promoter). They are located at the anterior-most region of the slug. During culmination pstA cells differentiate into pstAB cells. http://purl.obolibrary.org/obo/DDANAT_0000418 sentinel cell http://purl.obolibrary.org/obo/DDANAT_0000401 cell Cell present in multicellular organism that has a high ability to engulf bacteria and toxin and is presumed to have a detoxification and immune-like role. http://purl.obolibrary.org/obo/DDANAT_0000025 basal region of the standing slug http://purl.obolibrary.org/obo/DDANAT_0000110 basal region Region of the standing slug in contact with the substratum and composed of prestalk B cells. http://purl.obolibrary.org/obo/DDANAT_0000111 apex http://purl.obolibrary.org/obo/DDANAT_0010085 subdivision Apical region of the early plasmodium where cAMP signals originate that trigger positive chemotaxis from pstA and pstO cells. http://purl.obolibrary.org/obo/DDANAT_0010001 Dictyostelium discoideum anatomical structure Material anatomical entity that has inherent 3D shape and is generated by coordinated expression of the Dictyostelium discoideum genome. http://purl.obolibrary.org/obo/RO_0002202 develops_from http://purl.obolibrary.org/obo/BFO_0000050 part of