Studies on male gametophyte development of Euphorbia pulcherima
ZHANG Ning, LIN Qing-hong, ZENG Xin-ping, HUANG Wei-nan (Fujian Institute of Subtropical Botany, Xiamen 361006, Fujian China)
The anther of Euphorbia pulcherima originates from the primordium of stamen and it consists of epidermis (one layer), endothecium (one layer), middle layer (one layer), tapetum (one layer) and aporgenous cells. The anther has four chambers and the development of anther wall is dicotyledonous type. The microsporogenesis and male gametophyte development were observed as follows: With the mitosis of microspore mother cells, tetrad is formed, of which the cytokinesis is simultaneous type and the arrangement is tetrahedral; microspores complete the mitosis and generated double-nuclei pollen. The epidermis of anther disappears at the anther mature stage, the middle layer disappears at tetrad stage and the endothelium become columnar fibrous layer at the anther mature stage. The tapetum cells stretch radially and become double-nuclei or more at uninuclear microspore stage and some tapetum cells form trabeculae or placentoides. At double-nuclei pollens stage, the particles coming from tapetum cells go into anther chambers and the tapetum is off-type glandular tapetum. The tapetum disappears at anther mature stage. The abnormal anther development was observed simultaneously.
【CateGory Index】： S685.23