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Cytology of Encephalartos hildebrandtii A. Br. & Bouche
A. ABRAHAM and P. M. MATHEW
Annals of Botany
New Series, Vol. 30, No. 118 (April 1966), pp. 239-241
Published by: Oxford University Press
Stable URL: http://www.jstor.org/stable/42908664
Page Count: 4
You can always find the topics here!Topics: Chromosomes, Diploidy, Haploidy, Biological taxonomies, Triploidy, Centromeres, Ploidies, Endemic species, Cytology, Root tips
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The chromosomes of Encephalartos hildebrandtii A. Br. & Bouche were studied from root tip cells (2n=27), and the plant was found to be a triploid on the basic chromosome number 9. Karyotype analysis has shown that the somatic complement consists of two sets of chromosomes, a diploid set of 18 chromosomes in nine pairs, and a haploid set of 9, and therefore it is suggested that this is an allo triploid. This is the first report of a polyploid species in the genus Encephalartos , and also in the whole of the Cycadales.
Annals of Botany © 1966 Oxford University Press