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  1. Vol. 11 No. 1, p. 25-27
     

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doi:10.2135/cropsci1971.0011183X001100010008x

Ethylene Production in the Cotton Plant (Gossypium birsutum L.) Canopy and Its Effect on Fruit Abscission1

  1. M. D. Heilman,
  2. F. I. Meredith and
  3. C. L. Gonzalez2

Abstract

Abstract

Using gas solid chromatography, ethylene was determined in excised plant tissue and in the atmosphere at midpoint of the mature cotton (Gossypium hirsutum L.) canopy in the field. The ethylene produced from excised tissue was: leaves, 1,2 ✕ 10−9 moles/g; immature capsules, 0.35 ✕ 10−9 moles/g; bolls, 0.07 ✕ 10−9 moles/g; and pink blooms, 2 ✕ 10−9 moles/g. The ethylene in the atmosphere at the midpoint of the cotton canopy was 3.6 ✕ 10−12 moles/ml while the atmosphere surrounding an individual pink bloom contained 8 ✕ 10−12 moles/ml ethylene. Ethylene was applied at rates of 9.3 ✕ 10−12 and 18.6 ✕ 10−12 moles/ml to fruiting field-grown cotton plants enclosed in plastic bags. A statistically significant increase in abscission of immature capsules and bolls was found for the 18.6 ✕ 10−12 moles/ml-treated plants.

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