ARS | Publication request: CHANGES OF GROWTH, OSMOTIC POTENTIAL AND OSMOTIC ADJUSTMENT IN RICE UNDER SALT STRESS

Submitted to: Soil Science Society of America Annual Meeting
Publication Type: Abstract
Publication Acceptance Date: September 1, 2001
Publication Date: October 1, 2001
Citation: Kwon, T., Zeng, L., Wilson, C. 2001. Changes of growth, osmotic potential and osmotic adjustment in rice under salt stress. Soil Science Society of America Annual Meeting, held in Charlotte, NC. Oct. 20-25, 2001. (CD-ROM)

Technical Abstract: This study examined the effects of salt stress on growth and osmotic changes in rice upon exposure to salt stress. Plants of Oryza sativa L., cv. `M202', a relatively salt-sensitive genotype, were grown in a greenhouse using a solution culture system. Salt stress was imposed using 20 mM and 40 mM NaCl and CaCl2 mixture (10:1 molar ratio) for 10, 20 and 60 days. Salt imposition significantly (P < 0.05) reduced the relative growth rate (RGR) and osmotic potential without changes in the relative water content (RWC). Significant osmotic adjustment occurred in the rice plants grown in the treatment of 40 mM concentration. These results indicate that salt stress can induce an accumulation of solutes, thereby decreasing osmotic potential in rice plants.