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 HighWire Citing Articles via CrossRef Citing Articles via Web of Science (27) Citing Articles via Google Scholar Google Scholar Articles by Wilson, R. F. Articles by Quisenberry, J. E. Search for Related Content PubMed PubMed Citation Articles by Wilson, R. F. Articles by Quisenberry, J. E. Agricola Articles by Wilson, R. F. Articles by Quisenberry, J. E.

Environmental and Stress Physiology

Plant Morphological and Biochemical Responses to Field Water Deficits ¹

II. Responses of Leaf Glycerolipid Composition in Cotton

United States Department of Agriculture, Agricultural Research Service Soybean and Nitrogen Fixation Research Unit, North Carolina State University, Raleigh, North Carolina, United States Department of Agriculture, Agricultural Research Service Plant Stress and Water Conservation Research Unit, Texas Tech. University, Lubbock, Texas

The effects of water deficits on leaf glycerolipid composition were analyzed in two photoperiodic strains of field grown cotton (Gossypium kirsutum L.) that differ in sensitivity to drought. Leaves from plants grown under dryland conditions exhibited increased dry weight and specific leaf weight. The average midday leaf water potential in the dryland treatment decreased to –1.9 and –2.4 megapascals, respectively, for the T25 and T185 genotypes. Total leaf lipid content of plants exposed to dryland conditions was 5.9 and 7.5% of leaf dry weight for strain T25 and T185, respectively. The difference in leaf lipid content between these genotypes was caused by water deficits and was attributed to loss of both phospholipids and glycolipids in strain T25. There was no apparent loss of phospholipids due to water deficits in the T185 genotype; however, a significant loss of glycolipids was partially compensated by a 2-fold increase in triacylglycerol. No change in triacylglycerol was found between treatments in T25 leaves. Water deficit caused a significant decline in the relative degree of acylunsaturation in phospholipids and glycolipids from both genotypes; however, the double bond index for triacylglycerol increased in both genotypes. It is believed that the observed responses of leaf lipid composition to dryland conditions may be an additional criterion for characterization and selection of new drought-tolerant cotton genotypes.

This article has been cited by other articles:

				W. T. Pettigrew Physiological Consequences of Moisture Deficit Stress in Cotton Crop Sci., July 1, 2004; 44(4): 1265 - 1272. [Abstract] [Full Text] [PDF]

				S. Porfirova, E. Bergmuller, S. Tropf, R. Lemke, and P. Dormann Isolation of an Arabidopsis mutant lacking vitamin E and identification of a cyclase essential for all tocopherol biosynthesis PNAS, September 17, 2002; 99(19): 12495 - 12500. [Abstract] [Full Text] [PDF]