Browsing by Author "Rahiman, B.A."

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    Collection and conservation of Piper nigrum and related species from Karnataka forests
    (2007-02-08) Rahiman, B.A.; Nair, M.K.; Murthy, K.N.
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    Cytology of Piper species from the Western Ghats
    (2007-02-08) Rahiman, B.A.; Nair, M.K.
    Chromosome numbers were determined for eight species of Piper namely P. argyrophyllum Miq., P. attenuatum Ham., P. galeatum C. DC, P. longum Linn., P. nigrum Linn., P. trichostachyon C. DC, P. hookeri Miq., and P. mullesua Ham. The first six species showed a chromosome number of 2n = 52 and the last two, 2n = 104 each. A glance at the chromosome numbers of Piper spp. so far recorded from India, shows that mostly multiples of 12 chromosomes have been reported from the North India and multiples of 13 from the South India. It may be assumed that the species from these two centres of distribution probably had different evolutionary pathway starting from basic numbers of 6 and 7.
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    Distribution, morphology and ecology of Piper species in Karnataka, India
    (2007-02-08) Rahiman, B.A.; Murthy, K.N.; Nair, M.K.; Nayar, N.M.
    Collections of the genus Piper occurring widely in the forests of Karnataka, India were made. These consisted of eight species, P. nigrum Linn., P. longum Linn.,P. attenuatum Buch--Ham., P. galeatum C. DC, P. trichostachyon C. DC, P. argyrophyllum Miq., P. hymenophyllum Miq., and P. brachystachyum Wall. The various species showed considerable variation in distribution habitat preference, ecology, and morphology. All these Piper species were unisexual and dioecious, though the cultivated varieties of P. nigrum are bisexual. The two morphologically similar taxa, P. galeatum and P. trichostachyon, showed adjacent distiibution. The genus showed senescence in distribution.
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