ULTRASTRURAL STUDY OF MATURING POLLEN IN ARABIDOPSIS THALIANA (L.) HEYNH. (BRASSICACEAE)

摘要

Ultrastructural changes in Arabidopsis thaliana pollen, between late microspore stage and mature pollen stage were de- scribed. When the generative cell was peeled off from the intine, it was of spherical shape and had all usual organelles with the exception of plastids. The cytoplasm transformation of the vegetative cell included an increase in the number of mito- chondria and changes in the accumulation of starch and lipid bodies. The starch plastids were observed at the bicellular and early tricellular pollen stages and next starch was utilized during the maturation procces.