| Effect of strain Rs—5containing ACC deaminase on growth and salt-tolerance of cotton seedling under salt stress |
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| DOI：10.7606/j.issn.1000-7601.2009.06.34 |
| Key Words: salt stress strain Rs-5 cotton growth salt-tolerance |
| Author Name | Affiliation | | LIU Ying | School of Life Science and Technology Beijing Institute of Technology, Beijing 100081, China | | LI Yanju | School of Life Science and Technology Beijing Institute of Technology, Beijing 100081, China | | SHI Zaiqiang | Laboratory of Green Processing of Chemical Engineering／College of Agriculture Shihezi University, Shihezi, Xinjiang 832003, China | | YAO Lixia | Laboratory of Green Processing of Chemical Engineering／College of Agriculture Shihezi University, Shihezi, Xinjiang 832003, China | | LOU Chao | School of Life Science and Technology Beijing Institute of Technology, Beijing 100081, China | | LI Chun | School of Life Science and Technology Beijing Institute of Technology, Beijing 100081, China；Laboratory of Green Processing of Chemical Engineering／College of Agriculture Shihezi University, Shihezi, Xinjiang 832003, China |
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| Abstract: |
| In order to elucidate the effect of strain Rs-5 containing ACC deaminase on growth and salt-tolerance of cotton seedling under salt stress,the growth biomass of cotton and four physiological indices(MDA,proline,soluble sugar and soluble protein content) of the cotton seedling were studied by pot experiment under different salt concentrations,different Rs-5 bacteria suspension concentrations and in different treatment methods respectively.The results showed that cotton growth and its salt-tolerance under salt stress were promoted by strain Rs-5,and this effect was more obviously as salt stress increased.When salt concentration is above 0.4%,the influence of Rs-5 to both cotton growth and salt-tolerance reached a significant level (P<0.05),and reached a very significant level (P<0.01) at a salt concentration 0.8%.Compared with control,the average plant height,root length,dry weight of cotton seedlings increased by 8.9%,10.1% and 17.5%,and proline,soluble sugar and soluble protein content increased by 17.9%,0.8% and 151.4% respectively,while MDA content decreased by 42.8%,and the stress relief and growth promotion of Rs-5 efficacy is the best,when the bacteria suspension concentration reached OD=0.3(about 108 U/ml). |
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