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Plant Physiology 53:509-511 (1974)
© 1974 American Society of Plant Biologists

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Articles

Phospholipid Degradation in Frozen Plant Cells Associated with Freezing Injury 1,2

Shizuo Yoshida and Akira Sakai

a The Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan

A striking degradation of phosphatidylcholine into phosphatidic acid was observed in the cortical tissues of less hardy poplar (Poplus euramericani cv. gelrica), when the tissues were frozen below a lethal temperature. No change in phospholipids was detected during freezing or even after thawing in the cortical tissues of hardy poplar which survived slow freezing to –30 C or even immersion in liquid N2 after prefreezing to –50 C. The degradation of phosphatidylcholine during freezing appears to be intimately associated with freezing injury.

1 Contribution No. 1249 from the Institute of Low Temperature Science.

2 This work was supported in part by Grant 811208 from the Ministry of Education.




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Copyright © 1974 by the American Society of Plant Biologists