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ZJUS-B
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology)  2005, Vol. 6 Issue ( 2): 5-    DOI: 10.1631/jzus.2005.B0096
    
Gama-aminobutyric acid accumulation in Elsholtzia splendens in response to copper toxicity
YANG Xiao-e, PENG Hong-yun, TIAN Sheng-ke
Ministry of Education Key Lab of Environment, Remediation and Ecosystem Health, School of Natural Resources and Environmental Science, Zhejiang University, Hangzhou 310029, China
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Abstract  A solution with different Cu supply levels was cultured to investigate gama-aminobutyric acid (GABA) accumulation in Elsholtzia splendens, a native Chinese Cu-tolerant and accumulating plant species. Increasing Cu from 0.25 to 500 |ìmol/L significantly enhanced levels of GABA and histidine (His), but considerably decreased levels of aspartate (Asp) and glutamate (Glu) in the leaves. The leaf Asp level negatively correlated with leaf Cu level, while leaf GABA level positively correlated with leaf Cu level. The leaf Glu level negatively correlated with leaf GABA level in Elsholtzia splendens. The depletion of leaf Glu may be related to the enhanced synthesis of leaf GABA under Cu stress

Key words： Environment      Remediation and Ecosystem Health Accumulation      Copper toxicity      Elsholtzia splendens      Gama-aminobutyric acid (GABA)     
Received: 30 September 2004     
CLC:  X53  
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YANG Xiao-e
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YANG Xiao-e, PENG Hong-yun, TIAN Sheng-ke. Gama-aminobutyric acid accumulation in Elsholtzia splendens in response to copper toxicity. Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology), 2005, 6( 2): 5-.

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http://www.zjujournals.com/xueshu/zjus-b/10.1631/jzus.2005.B0096     OR     http://www.zjujournals.com/xueshu/zjus-b/Y2005/V6/I 2/5

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