Plant Diversity ›› 1996, Vol. 18 ›› Issue (01): 1-3.
• Articles •
XING Shu-Ping, XI Xiang-Yuan
After 1 ~ 8 h of anthesis, the egg cell has no wall at its chalazal end and a space is pres-ent between the plasma membranes of the egg cell and central cell which are discontinuous. The cytoplasm of the egg cell is mainly located at its chalazal portion in which the organelles are inactive. One synergid bears no complete wall at its chalazal end. The other has no wall and the plasma membrane is also discontinuous at its chalazal end which can connect with the "space" between the egg cell and central cell. Wall ingrowths appear at the micropylar and chalazal ends of the central cell. The polar nuclei or secondary nucleus and the surrounding cytoplasm in which many large starch grains are found are near the egg apparatus. At 2l h after anthesis, double ferti- lization is finished. The chalazal end wall of the zygote which contains abundant organelles changes from discontinuous to complete.
XING Shu-Ping, XI Xiang-Yuan. AN ULTRASTRUCTURAL STUDY OF EMBRYO SAC IN ARACHIS HYPOGAEA BEFORE AND AFTER FERTILIZATION[J]. Plant Diversity, 1996, 18(01): 1-3.
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