part_of part of part of anther wall anther wall tapetum A microsporangium tapetum (PO:0025314) that is part of an anther wall (PO:0000002). Develops from a primary or secondary parietal cell layer. Innermost part of the anther wall, involved in the nutrition of the pollen. If you are annotating to this structure for Zea mays or other grasses, please also add an annotation to the corresponding floret type. Choose the most specific term possible from: spikelet floret (PO:0009082), tassel floret (PO:0006310), lower floret of pedicellate spikelet of tassel (PO:0006313), lower floret of sessile spikelet of tassel (PO:0006315), upper floret of pedicellate spikelet of tassel (PO:0006314), upper floret of sessile spikelet of tassel (PO:0006316). PO:0006450 PO:0006484 PO:0009071 PO_GIT:357 Poaceae tapetum (narrow) Zea tapetum (narrow) plant_anatomy pollen sac tapetum (exact) portion of anther wall tapetal tissue (exact) tapete (Spanish, exact) 葯壁タペート組織 (Japanese, exact) microsporangium tapetum