TY -JOUR
AU -Su-Fang Huang
AU -Su-Hwa Tsai Chiang
TI -Sporogenesis in Isoetes Taiwanensis Devol
PY -1983
DA -0000-00-00
JO -Taiwania
VL -28
IS -1
SP -68
EP -88
UR -https://taiwania.ntu.edu.tw/abstract/534
AB -The development of sporangium and sporogenesis in Isoetes taiwanensis DeVol are described. Based on cell lineage and cytoplasmic contents, the sporangium in I. taiwanensis is suggested to be of hypodermal origin. The ontogeny of microsporangium and megasporangium are the same in the early stage. The first indication of the young microsporangium is the differentiation of the irregular groups of deeply-staining cells (microsporocytes) and lightly-staining cells (which become trabecula, tapetum and part of sporangial wall), whereas the earlist indication as a megasporangium is the enlargement of the megasporocytes. The first fruiting leaves in the growing season are always megasporophylls, and then followed by microsporophylls. There is occasionally some irregularity in the order of succession, and sometimes a sporangium is found bearing both micro and megaspores.
DO -10.6165/tai.1983.28.68