不同种类外源多胺缓解番茄盐胁迫伤害的研究

采用水培法，以耐盐能力较弱的番茄品种江蔬14号为试验材料，研究了盐胁迫下不同种类、不同浓度外源多胺对番茄幼苗生长及质膜透性 的影响。结果表明：100 mmol·L^-1的NaCl胁迫12 d，番茄幼苗的株高相对生长率、主根长相对生长率及植株的干质量、鲜质量降低，叶片质膜透性 增加；喷施外源多胺可以缓解盐胁迫对幼苗生长的抑制作用，其中100 mg·L^-1 Spd、100 mg·L^-1 Spm和150 mg·L^-1 Put作用效果最为明显。

The Comparison of Alleviative Effects of Different Kinds of Exogenous Polyamines on Salt Injury of Tomato Seedlings

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.