Biologia plantarum 26:260-262, 1984 | DOI: 10.1007/BF02902906
Influence on chromosome behaviour, nucleic acid content and ultra-structural analysis of accessories inUrginea indica KUNTH.
- 1 Centre of Advanced Study, Cell and Chromosome Research, Department of Botany, University of Calcutta, Calcutta, India
The occurrence of polysomaty was noted in a diploid cytotype ofUrginea indica with B chromosomes. These accessories could be clearly distinguished from the other chromosomes in their stainability, very small size, morphology, variability and irregular behaviour. The variant nuclei were hyperdiploid, hypertriploid and hypertetraploid. B chromosomes were noted only in diploid cells and no accessories could be recorded in cells showing higher chromosome number.
The amount of DNA content as indicated by the absorbance is rather low as compared to the diploid without accessories which may be due to the shorter size of the chromosomes. Under ultrastructural study subterminal centromeric region of B chromosome show low electron dense appearance.
Received: August 8, 1983; Accepted: December 7, 1983; Published: July 1, 1984 Show citation
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