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Development of Embryo Sac and Endosperm in Chrozophora rottleri A. Juss. A Reinvestigation
R. N. Kapil
Vol. 117, No. 3 (Mar., 1956), pp. 242-247
Published by: The University of Chicago Press
Stable URL: http://www.jstor.org/stable/2473411
Page Count: 6
You can always find the topics here!Topics: Megasporocytes, Mother cells, Embryo sac, Endosperm, Embryos, Ovules, Gametophytes, Plant cells, Megaspores, Beak
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1. The ovules in Chrozophora rottleri A. Juss. are crassinucellate, bitegmic, and hemianatropous. The nucellus shows a well-developed beak which grows out of the micropyle and reaches almost to the placenta. 2. The hypodermal archesporial cell cuts off a parietal cell. The chalazal cell of a linear tetrad of megaspores produces the 8-nucleate gametophyte. Development thus conforms to the Polygonum type. 3. The endosperm is of the Nuclear type. Centripetal wall formation occurs at the heart-shaped stage of the embryo, and ultimately cellular endosperm occupies the entire embryo sac.
Botanical Gazette © 1956 The University of Chicago Press