has_part has part has part participates in participates_in participates in portion of plant tissue gametophyte development stage tmema cell tmema 2011-04-29T08:30:03Z A portion of plant tissue (PO:0009007) that has as parts tmema cells (PO:0030059). Found in bryophytes at the base of a gemma (PO:0025614). Participates in abscission of the gemma. PO:0030061 PO_GIT:331 plant_anatomy rwalls tmema (Japanese, exact) tmema (Spanish, exact)