Showing papers by "Sumita Jha published in 1983"
TL;DR: A tetraploid cytotype, representing a high yielding strain which can be exploited commercially for better yield of cardiac glycosides, has been obtained from Pune.
Abstract: Roots of URGINEA INDICA K UNTH, (Liliaceae) Indian squill, contain high amounts of proscillardin A and scillaren A. The range of variation in proscillaridin A and scillaren A contents in bulbs is 0.004-0.26% in diploids, 0.04-0.07% in triploids and 0.02-0.45% in tetraploids. The relative proportion of proscillaridin A and scillaren A also varies in different cytotypes. A tetraploid cytotype, representing a high yielding strain which can be exploited commercially for better yield of cardiac glycosides, has been obtained from Pune.
26 citations
TL;DR: The present investigation deals with chromosome study of ten polyploid populations of Urginea indica Kunth representing triploids, tetraploids and hitherto unrecorded hexaploid and the role of structural alteration of chromosomes in the evolution of races is evident.
Abstract: The present investigation deals with chromosome study of ten polyploid populations of Urginea indica Kunth representing triploids, tetraploids and hitherto unrecorded hexaploid. Different cytotypes frequently occur in the same climatic zone, but the constancy of the karyotype within the populations indicates certain adaptability to the microenvironmental condition to which they are subjected. The karyotype is highly asymmetrical both in size and morphology. There is no reduction in chromosome size along with polyploidy. The populations, however, differ with respect to minute karyotypic details. The role of structural alteration of chromosomes in the evolution of races is evident. Occurrence of large number of cytotypes both numerically and structurally altered as well as extensive vegetative reproduction has resulted in wide distribution of U. indica.
21 citations