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| The Comparison of Alleviative Effects of Different Kinds of Exogenous Polyamines on Salt Injury of Tomato Seedlings |
| WANG Nai-qiang,HU Xiao-hui*,LI Rui,LIU Tao-xi,YANG Dong,QIU Chuan-xun |
| College of Horticulture,Northwest A&F University,Yangling 712100,Shaanxi,China |
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Abstract In this paper,by the method of hydroponics,the tomato cultivar‘Jiangshu No.14’(salt-tolerance weaker cultivar)was chosen as experimental material.The effects of different kinds and concentration of exogenous polyamines on the growth of tomato seedlings and membrane permeability of tomato leaves under salt stress were studied.The results showed that under the stress of 100 mmol·L-1 NaCl,the relative growth rate of plant height,relative growth rate of main roots,dry and fresh weight of tomato seedlings reduced,while the membrane permeability of tomato leaves increased on the 12th day.The suppressive effects of salt stress on tomato seedlings could be alleviated by spraying exogenous spermine(Spm),spermidine(Spd),putrescine(Put),and the alleviative effects of 100 mg·L-1 Spd,100 mg·L-1 Spm and 150 mg·L-1 Put were distinctive.
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Received: 22 July 2008
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