Study on the Physiology of Transgenic Rice Seedlings with Gene of Betaine Aldehyde DehydrogeNa+se Gene under Salt Stress

doi:10.3321/j.issn:1000-7091.2004.03.010

Abstract

Abstract: Salt stress experiments of rice seedlings of two lines with a gene encoding for BADH,51一22，52 一7 and the recipient Zhonghua No. 8，were conducted under the Na⁺CI concentration of 0，3. 0，5. 0，7. 0 g/L. The results showed that the rice cultivars with a gene encoding for BADH demonstrated higher salt tolerance than its recipient;The gene encoding for BADH could reduce the salt injury by increasing CAT activity,root ac-tivity,chlorophyll content and cell membrane osmosis,and by decreasing the Na⁺十concentration in the seedlings under high Na⁺CI stress (Na⁺CI concentration:5.0, 7. 0 g/L) ; The CAT activity, SN。十/K* and chlorophyll content are the main physiological indexes affecting the seedling growth.

Key words: Rice, Betaine aldehyde dehydrogenase, Salt stress, Salt tolerance physiology

CLC Number:

S511.01

SUN Yao-zhong, DONG Fang-yang, CHEN Shou-yi, YANG Xiao-ling, LIU Yong-jun, GUO Xue-min. Study on the Physiology of Transgenic Rice Seedlings with Gene of Betaine Aldehyde DehydrogeNa⁺se Gene under Salt Stress[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2004, 19(3): 38-42. doi: 10.3321/j.issn:1000-7091.2004.03.010.

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