J Integr Plant Biol. ›› 1992, Vol. 34 ›› Issue (12): -.

• Research Articles •    

Microsporogenesis, Megasporogenesis and the Formation of Male and Female Gametophyte in Coix lacryma-jobi L.

Dong Jian-hua and Xi Xiang-yuan   

Abstract: The development of the anther wall follows the monocotyledonous type. During meiotic stages of prophase I, some cytoplasmic channels are observed on the walls between meiotic cells. which divide synchronously. Cytokinesis in the microspore mother cell is of the successive type and gives rise to iscbilateral tetrad. The cell wall between the generative cell and the vegetative cell in early stage shows PAS positive reaction. The mature pollen grain is of 3-celled type. The development of the female gametophyte follows the polygonum-type; the antipodal cells proliferate to form a multicellular tissue mass. Many starch grains are present in the central cell. The nucleus of the mature egg cell is located at the micropylar end; a great deal of starch grains are in the cytoplasm surrounding the nucleus, while vacuoles of various size distribute throughout its cytoplasm but are more and larger at the chalaza,1 end. The nucleus of the synergid cell is located at the micropytar end where a filiform apparatus is formed and many small vacuoles are present at the chalazal part.

Key words: Coix lacryma-jobi L, Microspore, Megaspore, Male and female gametophyte

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