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《Acta Agronomica Sinica》 2000-06
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Effect of NaCl Stress on Ionic Contents in Different Organs of Sorghum Plants

WANG Bao Shan 1 ZOU Qi 2 ZHAO Ke Fu 1 ( 1Institute of Plant Stress, Shandong Teachers′ University, Shandong Jinan 250014; 2Department of Plant Science, Shandong Agricultural Universit y, Shandong Taian 271018)  
Changes in Na +, K +, Ca 2+ and Cl - contents in different organs of sand cultured sorghum seedlings under NaCl stress were studied. Under mild salt stress, root Na + content of both salt tolerant Du Jiao Hu and salt sensitive Tang Gao Liang was markedly higher than the average of all the organs of the shoot. As for Du Jiao Hu, Na + content in sheath was significantly higher than that in leaves. There was no significant d ifference in Na + content between mature blade and young blade, but Na + con tent of mature sheath was some higher than that of young sheath. As for Tang Gao Liang, Na + content of mature blade was higher than that of young blade and N a + content of young blade was higher than that of mature sheath. Under severe NaCl stress, the gradient of Na + content between the roots and shoot disappeared, Na + content in the shoot was even higher than that in the roots. Under NaCl stress K + content in different organs was decreased in orders: rootsheathblade. Ca 2+ content was also decreased but in orders: youn g bladesheathroot. Cl - content in different organs was all increased under NaCl stress and the degree of the increase was in orders: shootroot; sheath blade; mature bladeyoung blade. The relationship between the changes in Na + , K +, Ca 2+ and Cl - contents of different organs and salt tolerance of sorghum plants was discussed.
【Fund】: 国家重点基础研究专项经费 !( G1 9990 1 1 70 0 ) ;; 国家自然科学基金;; 山东省自然科学基金资助项目
【CateGory Index】: S514
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