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Position: Home > Articles > Role of γ-Aminobutyric Acid(GABA) on Stimulating Ethylene Biosynthesis in Caragana intermedia Seedlings under NaCl Stress Scientia Silvae Sinicae 2008,44 (9) 26-30

外源GABA对NaCl胁迫下中间锦鸡儿幼苗乙烯生成的调控作用

作  者:
史胜青;齐力旺;肖文发;李春秀;林萍;张守攻
单  位:
中国林业科学研究院森林生态环境与保护研究所;中国林业科学研究院林业研究所
关键词:
中间锦鸡儿;NaCl胁迫;γ-氨基丁酸;乙烯
摘  要:
对NaCl胁迫条件下中间锦鸡儿幼苗施加外源GABA的研究表明:200 mmo.lL-1NaCl处理72 h时,幼苗体内乙烯含量增加,但是外源GABA能够进一步提高NaCl胁迫条件下乙烯含量;在250 mmol.L-1NaCl胁迫初期(24h)乙烯含量急剧增加,施加外源GABA反而抑制了乙烯的生成;随着胁迫时间的延长,外源GABA对乙烯的生成表现为促进作用。转录水平研究进一步表明:NaCl胁迫条件下外源GABA提高了乙烯生成关键基因1-氨基环丙烷-1-羧酸(ACC)氧化酶基因CaACO1和CaACO2在中间锦鸡儿根部的表达。
译  名:
Role of γ-Aminobutyric Acid(GABA) on Stimulating Ethylene Biosynthesis in Caragana intermedia Seedlings under NaCl Stress
作  者:
Shi Shengqing~(1,2) Qi Liwang~(1) Xiao Wenfa~2 Li Chunxiu~2 Lin Ping~1 Zhang Shougong~1(1.Research Institute of Forestry,CAF Beijing 100091;2.Research Institute of Forest Ecology,Enviroment and Protection,CAF Beijing 100091)
关键词:
Caragana intermedia;NaCl stress;γ-aminobutyric acid;ethylene
摘  要:
Exogenous GABA was applied on Caragana intermedia seedlings under NaCl stress.The results showed that the plants treated with 200 mmol·L~(-1) significantly increase in ethylene production in 72 h,while exogenous GABA could further enhance the production of ethylene.At early stage treatments of 250 mmol·L~(-1) NaCl and exogenous GABA,NaCl-treated tissues showed obvious increase in ethylene production,whereas exogenous GABA inhibited the production of ethylene in the NaCl-treated tissues.With the extension of treated time,exogenous GABA did promote the production of ethylene.At the transcriptional level,exogenous GABA induced more expression of amino-cyclopropane-1-carboxylie acid(ACC) oxydase genes,CaACO1 and CaACO2 in C.intermedia that was under NaCl stress,compared with NaCl stress only.

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