Comparative effects of osmotic-, salt- and alkali stress on growth, photosynthesis, and osmotic adjustment of cotton plants

• DOI: 10.1007/s11099-011-0050-y
• Publication Date: 2011-09-17T06:58:52Z
• Authors: W. Chen; C. Feng; W. Guo; D. Shi; C. Yang
• Keywords: Osmolyte; Osmotic shock; Osmotic pressure; Osmoregulation; Inorganic ions; Osmosis; Plant Physiology

In this study, cotton seedlings were subjected to osmotic-, salt- and alkali stresses. The growth, photosynthesis, inorganic ions, organic acids in the stressed measured, compare mechanisms by which plants adapt these stresses attempt probe high pH stress. Our results indicated that, at stress intensity, both osmotic showed a stronger injurious effect on growth photosynthesis than salt Cotton accumulated large amount of Na+ under stresses, but not addition, reductions K+, NO3 -, H2PO4 - much greater those with increasing intensity. lack ions limited water uptake was main reason for higher injury from osmotic-compared cotton. Compared most dramatic response accumulation soluble sugars as osmolytes. we found that acid metabolism adjustment may play different roles types Under stress, might an important role maintaining ion balance cotton; however, malate role.