Gametogenesis and embryogeny of Tamarix ericoides Rottl

Sharma, Y. M. L. (1939) Gametogenesis and embryogeny of Tamarix ericoides Rottl. Annals of Botany, 3 (4). pp. 861-870.

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The haploid chromosome number in Tamarix ericoides Rottl., reported for the first time, is twelve.The archesporial cell is single, rarely double.There is no tetrad formation, division of the megaspore mother-cell; instead, a four nucleate embryo-sac results.The nuclei are originally arranged in a cruciform type, but later form a I+3 arrangement.As a result of the third division, the embryo-sac is again four-nucleate, with two haploid nuclei at the micropylar end and two triploid nuclei at the chalazal end.The cells of the embryo-sac are formed at the end of the fourth division, the embryo-sac thus representing the sixteen nucleate condition.The development of the embryo-sac of Tamarix ericoides conforms to the Fritillaria-type.The endosperm is free nuclear, and the embryo is characteristic in developing a massive suspensor and a large pad of cellular tissue from the proximal cell.Double embryo-sacs and the occurrence of polyembryony are reported for the first time in the family. © 1939 Oxford University Press.

Item Type: Article
Subjects: B Life Science > Botany
Divisions: Department of > Botany
Depositing User: Dhruva Kumar
Date Deposited: 07 May 2021 08:38
Last Modified: 28 Oct 2022 05:34

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