TY -JOUR
AU -Fu-Yea Yeh
AU -Su-Hwa Tsai Chiang
TI -Ligule in Selaginella delicatula (Desv.) Alston
PY -1991
DA -0000-00-00
JO -Taiwania
VL -36
IS -1
SP -1
EP -22
UR -https://taiwania.ntu.edu.tw/abstract/191
AB -The anatomy and ontogeny of ligule in Selaginella delicatula (Desv.) Alston were examined using both optical and electrical microscopes. The ligule varies in form, from finger-like, bi- to multilobed plamate, acropetally as four regions basing on the cell morphology. They are sheeth, glossopodium, basal cell region and neck. The sheeth cells as well as the glossopodial cells are transfer cell in the well developed ligule. The former is flattened double cell layered and the latter is single row of elongated and highly vacuolated cells. Basal cell region is composed of relatively isodiametric protoplasmic cells whereas the cells in neck are overlapped each other in arrangement. The first indication of the senescence of a ligule is the shrinkage of neck cells. The possible function of each region of the ligule is assumed based on cellular structure.
The ligule arises from two to three rows of adaxial protodermal cells at the junction of leaf primodium and stem. As it grows, the basal cells are the first tissue to be identified, followed by glossopodial cells, sheath cells and neck cells.
DO -10.6165/tai.1991.36.1