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Cytological studies with reference to chromocenters in a monotypic, threatened medicinal tree Oroxylum indicum (L.) Vent.

Author:
Gokhale, Mamta, Bansal, Yogendra Kumar
Source:
Caryologia 2012 v.65 no.3 pp. 171-175
ISSN:
2165-5391
Subject:
Oroxylum indicum, cell differentiation, chromocenters, chromosome number, heterochromatin, medicinal plants, meiosis, mitosis
Abstract:
The nuclear structures in different tissues of a number of dicotyledonous angiosperms show that, in certain species, nuclear repatternings due to the close association of different heterochromatic chromosomal regions occur in differentiating and differentiated cells. Chromocenter association plays a role in or is a marker of events that bring into play a large-scale control mechanism of the functional activity of the nucleus that is exploited in cell differentiation from its early stages. The somatic chromosome numbers of the genus Oroxylum indicum reported are 2 n = 28, 2 n = 30 and 2 n = 38. The present work attempts to gives an account of the correct chromosome number in relation to chromocenters in mitotic and meiotic cells of Oroxylum indicum (L.) Vent.
Agid:
1219162