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Gama-aminobutyric acid accumulation in Elsholtzia splendens in response to copper toxicity

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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 μmol/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.

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Authors and Affiliations

  1. Ministry of Education Key Lab of Environment, Remediation and Ecosystem Health, School of Natural Resources and Environmental Science, Zhejiang University, 310029, Hangzhou, China

    Xiao-e Yang, Hong-yun Peng & Sheng-ke Tian

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  1. Xiao-e Yang
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  2. Hong-yun Peng
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  3. Sheng-ke Tian
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Correspondence to Xiao-e Yang.

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Projects supported by the National Basic Research Program (973) of China (No. 2002CB410804) and the National Natural Science Foundation of China (No. 29977017)

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Yang, Xe., Peng, Hy. & Tian, Sk. Gama-aminobutyric acid accumulation in Elsholtzia splendens in response to copper toxicity. J Zheijang Univ Sci B 6, 96–99 (2005). https://doi.org/10.1631/jzus.2005.B0096

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  • DOI: https://doi.org/10.1631/jzus.2005.B0096

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