Studies on the development of gametophytes and endosperm in Jamesbrittenia microphylla (Scrophulariaceae) with reference to its systematic position

Urs, H.G.V.G. and Nagendran, C.R. (1996) Studies on the development of gametophytes and endosperm in Jamesbrittenia microphylla (Scrophulariaceae) with reference to its systematic position. South African Journal of Botany, 62 (2). pp. 99-103.

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Abstract

In Jamesbrittenia microphylia (L.f.) Hilliard, the anther is bilobed, bilocular and bisporangiate. The microsporangium wall comprises epidermis, endothecium, middle layer and tapetum. Cytokinesis of pollen mother cells is simultaneous. Microspore tetrads are tetrahedral. The triaperturate pollen grains are shed at the 2-celled stage. Ovules are anatropous, tenuinucellate and unitegmic. The development of the embryo sac is of the Polygonum type. An endothelium surrounds the mature embryo sac. Endosperm development is ab initio cellular. Both chalazal and micropylar haustoria are well developed. The chalazal haustorium is 2-celled and the micropylar haustorium is 4-celled. These results are compared with earlier work in the Manuleae tribe and the close relationship between Manuleae and Selagineae is emphasized.

Item Type:	Article
Subjects:	B Life Science > Botany
Divisions:	Department of > Botany
Depositing User:	Users 23 not found.
Date Deposited:	22 May 2021 06:58
Last Modified:	22 May 2021 06:58
URI:	http://eprints.uni-mysore.ac.in/id/eprint/16569

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