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This article in AJ

  1. Vol. 59 No. 3, p. 253-254
     
    Received: Oct 27, 1966
    Published: May, 1967


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doi:10.2134/agronj1967.00021962005900030014x

Endosperm Utilization in Relation to Cold Tolerance of Orchardgrass Seedlings1

  1. Glen A. Murray and
  2. Clee S. Cooper2

Abstract

Abstract

Seeds of orchardgrass were used to study the relationship of initial growth temperature to endosperm utilization, seedling growth, and injury to seedlings subjected to cold temperatures. Rate of endosperm utilization was greater at 15 and 20 C than at 10 C. Endosperm exhaustion occurred between 14 to 16 days at 15 and 20 C and between 24 to 26 days at 10 C. Dry weight loss of the seed and seedling length were both accurate indices of the occurrence of endosperm exhaustion.

Cold injury to seedlings was progressively greater from pre- to post-endosperm exhaustion stages of seedling development. Seedlings grown at a higher temperature (faster rate of endosperm depletion) exhibited more leaf injury than seedlings grown at a cooler temperature (slower rate of endosperm utilization).

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