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

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 2n = 28, 2n = 30 and 2n = 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.

Male meiosis, sporad analysis and pollen viability in a threatened medicinal plant Oroxylum indicum (L.) Kurz

“…Despite having caught botanical attention, research on O. indicum are confined to the documentation of ethnomedicinal uses, chemical analysis, exploration of pharmaceutical and therapeutic potential of its compounds and study of pollination mechanism and conservational aspects. The sporadic cytological studies, which are integral components of the reproductive pathway, are restricted to the study of somatic chromosome number Mangenot & Mangenot, 1962) and the mitotic and meiotic division (Gokhale & Bansal, 2012) with special reference of chromosome number and chromocenters. The present work was therefore taken up with the aim of investigating the meiotic aspects for understanding evolutionary processes necessary for designing conservational strategies.…”

Effect of GA3 treatments and sowing conditions on ex situ seed germination of Oroxylum indicum (L) Benth. Ex Kurz: A threatened high value medicinal plant

“…Ex Kurz (Family: Bignoniaceae) is a medium-sized, deciduous tree with soft and light brown bark [1]. This plant is native to the Indian subcontinent with extended distribution to southeast and south Asian countries [2].…”