This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via CrossRef Citing Articles via Web of Science (84) Citing Articles via Google Scholar Google Scholar Articles by John, J. B. St. Articles by Christiansen, M. N. Search for Related Content PubMed PubMed Citation Articles by John, J. B. St. Articles by Christiansen, M. N. Agricola Articles by John, J. B. St. Articles by Christiansen, M. N.

Articles

Inhibition of Linolenic Acid Synthesis and Modification of Chilling Resistance in Cotton Seedlings

Agriculture Environmental Quality Institute and Plant Physiology Institute, Agricultural Research Service, United States Department of Agriculture, Beltsville, Maryland 20705

The temperature at which cotton seeds (Gossypium hirsutum L.) germinated influenced the fatty acid composition of the polar lipids of developing root tips. Seeds were germinated at 15, 20, 25, and 30 C. As the temperature decreased the linolemic acid content of the polar lipid fraction increased. Sandoz 9785[4-chloro-5-(dimethylamino)-2-phenyl-3(2H)-pyridazinone] reduced the low temperature-induced increase in linolenic acid content of the polar lipids and reduced seedling ability to withstand 8 C chilling. The results are consistent with the conclusion that chilling resistance in cotton seedlings is related to the level of linolenic acid in the polar lipids in the developing root tips.