Studies on pollen exine ultrastructure of the Polygonaceae

›› 2000, Vol. 38 ›› Issue (5): 446-451.

ZHOU Zhong-Ze, XU Ren-Xin, ZHUANG Yong-Long, LIN Zhong-Qing

Abstract:

Pollen grains of 15 species representing 6 genera in the Polygonaceae were examined un-

der scanning electron microscope (SEM) and transmission electron microscope (TEM). The results

are summarized as follows: (1) The ornamentation of exine is granulate-perforate, microechinate-

perforate, microechinate-perforate-smooth, granulate-perforate-smooth,finely reticulate, coarsely re-

ticulate, or rugulate, granulate. (2) Under TEM all of the taxa examined generally have the exine

stratification typical of the dicots: tectum, columellae, foot layer and endexine, although differences

in the development of each of these units have resulted in variation in the exine structure.

Key words: Polygonaceae, Pollen exine, Ultrastructure

ZHOU Zhong-Ze, XU Ren-Xin, ZHUANG Yong-Long, LIN Zhong-Qing. Studies on pollen exine ultrastructure of the Polygonaceae[J]. , 2000, 38(5): 446-451.

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