J Integr Plant Biol. ›› 1992, Vol. 34 ›› Issue (8): -.

• Research Articles •    

Anther Wall of Cymbidium Goeringii with Special Reference to the Tapetum

Qu Xin-shun,Li Rong-qian and Wang Jian-bo   

Abstract: The structure of the anther wall in Cymhidum goeringii (Rchb. f.)Rchb.f, was followed through two developmental stages using light and electron microscope: The peculiar anatomical pattern of the anther wall and the cytological characteristics of its tissues are described. Tapetum is the most notable feature in the anther wall. The specialized characteristics of the tapetal cells may be summerized as followings: (1) The tapetum may be distinguished into outer and inner tapetum, but they constitute the continuous layers surrounding the pollinium. The inner tapetum is derived from the connective tissue. (2) The outer and inner tapetum are composed of 2--3 cell layers. They have the same ultrastructural features and functions. (3) There are many lipid-containg plastids in the tapetal cells during their developmental stage. This is the main source of lipid bodies in the tapetal cells during their final developmental stage. The lipid-containing plasmids are derived from the extension of the nuclear membrane. (4) After the formation of tetrads, the secretion and the autolysates from of the tapetal cells not only deposition the surface of the pollinium to form the film, but also flow into the inner region of the polinia between the retrads contributing to their adhesion. The results of this study provide some new data of the tapetal structure and function in the angiosperms.

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