Endosperm Utilization in Relation to Cold Tolerance of Orchardgrass Seedlings1
- Glen A. Murray and
- Clee S. Cooper2
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).Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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