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This article in AJ

  1. Vol. 61 No. 5, p. 687-690
    Received: Jan 27, 1969

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Moisture Content of Cotton Leaves and Petioles as Related to Environmental Moisture Stress1

  1. D. E. Longenecker and
  2. P. J. Lyerly2



Moisture content of topmost mature cotton (gossypium) leaves and petioles, from irrigation to permanent wilting, was determined directly in two studies — one in the greenhouse and one in the field. Fresh weight moisture percentages of both leaves and petioles were shown to decrease gradually as soil moisture was depleted, dropping more rapidly near permanent wilting. Petioles showed consistently higher moisture percentages and more uniform depletion curves than leaves throughout the moisture extraction periods. This suggests that cotton petioles may be more reliable and more useful indicators of the constantly changing plant-soil moisture relationship than leaves.

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