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This article in CS

  1. Vol. 10 No. 4, p. 390-392
     
    Received: Jan 19, 1970


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doi:10.2135/cropsci1970.0011183X001000040023x

Wheat and Barley Vernalization in a Precise Temperature Gradient1

  1. E. J. Trione and
  2. R. J. Metzger2

Abstract

Abstract

Rate of meristem elongation of the primary culm in winter wheat (Triticum aestivum L.) and barley (Hordeum vulgare L.) was a function of temperature and length of cold treatment. Elongation of the wheat meristems did not begin unless the seedlings had a minimum of 15 days at 5 to 8 C. Effectiveness of the cold treatment in wheat seedlings was maximum at 7 C but decreased very rapidly if the vernalization temperature was raised to 9 C or lowered to 3 C. The barley variety required a vernalization period greater than 12 days. Effectiveness of the cold treatment of barley seedlings was maximum at 9 C and decreased rapidly if the vernalization temperature was raised to 12 C or lowered to4 C.

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