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Agronomy Journal Abstract -

Reflectance and Internal Structure of Cotton Leaves, Gossypium hirsutum L.1


This article in AJ

  1. Vol. 61 No. 3, p. 374-376
    Received: Aug 31, 1968

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  1. H. W. Gausman,
  2. W. A. Allen,
  3. V. I. Myers and
  4. R. Cardenas2



Cotton (Gossypium hirsutum L.) plants were grown hydroponically in a controlled environment. Sodium chloride was used to induce three osmotic stresses: low (O atm), medium (6 atm), and high (12 atm). Leaves of approximately the same age were harvested 49 days after planting from five replications of each treatment, and then: reflectance and transmittance spectra were obtained for the wavelength interval 500- to 2,500µ Osmotic stresses of 6 and 12 atm reduced reflectance and increased transmittance of near-infrared light (750 - 1,350 mµ) as compared with leaves from plants grown with low osmotic stress. Tissue sections from the same leaves were processed to provide transverse sections for histological examination; leaves from plants grown with 6 and 12 atm of osmotic stress exhibited a more compact cell arrangement than nonosmotically stressed leaves.

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