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 (97) Citing Articles via Google Scholar Google Scholar Articles by Ackerson, R. C. Articles by Hebert, R. R. Search for Related Content PubMed PubMed Citation Articles by Ackerson, R. C. Articles by Hebert, R. R. Agricola Articles by Ackerson, R. C. Articles by Hebert, R. R.

Articles

Osmoregulation in Cotton in Response to Water Stress ¹

I. ALTERATIONS IN PHOTOSYNTHESIS, LEAF CONDUCTANCE, TRANSLOCATION, AND ULTRASTRUCTURE

Central Research and Development Department, Experimental Station, E. I. du Pont de Nemours and Company, Wilmington, Delaware 19898

Cotton plants subjected to a series of water deficits exhibited stress adaptation in the form of osmoregulation when plants were subjected to a subsequent drying cycle. After adaptation, the leaf water potential coinciding with zero turgor was considerably lower than in plants that had never experienced a water stress. The relationship between leaf turgor and leaf water potential depended on leaf age.

Nonstomatal factors severely limited photosynthesis in adapted plants at high leaf water potential. Nonetheless, adapted plants maintained photosynthesis to a much lower leaf water potential than did control plants, in part because of increased stomatal conductance at low leaf water potentials. Furthermore, adapted plants continued to translocate recently derived photosynthate to lower leaf water potentials, compared with control plants.

Stress preconditioning modified cellular ultrastructure. Chloroplasts of fully turgid adapted leaves contained extremely large starch granules, seemed swollen, and had some breakdown of thylakoid membrane structure. In addition, cells of adapted leaves appeared to have smaller vacuoles and greater nonosmotic cell volume than did control plants.

This article has been cited by other articles:

				W. A. Pline, R. Wells, G. Little, K. L. Edmisten, and J. W. Wilcut Glyphosate and Water-Stress Effects on Fruiting and Carbohydrates in Glyphosate-Resistant Cotton Crop Sci., May 1, 2003; 43(3): 879 - 885. [Abstract] [Full Text] [PDF]

				W. Jia, J. Zhang, and J. Liang Initiation and regulation of water deficit-induced abscisic acid accumulation in maize leaves and roots: cellular volume and water relations J. Exp. Bot., February 1, 2001; 52(355): 295 - 300. [Abstract] [Full Text] [PDF]

				J. S. Boyer Plant Productivity and Environment Science, October 29, 1982; 218(4571): 443 - 448. [Abstract] [PDF]