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This article in CS

  1. Vol. 20 No. 4, p. 534-537
    Received: Feb 8, 1980

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Capitate Hairs on Cotton Leaves and Bracts1

  1. K. Kosmidou-Dimitropoulou,
  2. J. D. Berlin and
  3. P. R. Morey2



Significant differences in the capitate hair density of different cotton, Gossypium hirsutum L and G. arboreum L., stocks were revealed by quantitative analysis of scanning electron micrographs of leaf and involucral bract epidermal surface;. The density of capitate hairs on eight greenhouse-grown stocks ranged from 2.1 to 8.7 and from 4.7 to 31.6 per mm2 on the adaxial and abaxial leaf surfaces, respectively. The capitate hair density on bracts of seven greenhouse-grown stocks ranged from 0.9 to 45 and from 3.4 to 8.6 per mm2 on the adaxial and abaxial surfaces, respectively. There were significant differences among stocks in capitate hair density on both leaves and bracts. Capitate hairs were present on leaves of plants with the H2, Sm1s1Sm2, ne1ne2, or gl2gl3 mutant genes. There were no significant differences in capitate hair density on leaves of the same stock collected two years apart or on bracts collected from the same plant at anthesis or at 30 and 60 days postanthesis.

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