不同种类外源多胺缓解大豆盐胁迫伤害的研究  

Alleviative Effects of Different Kinds of Exogenous Polyamines on Salt Injury of Soybean Seedlings

作　　者：王强 尹相博[2] 

机构地区：[1]浙江自然博物馆,浙江杭州310012 [2]华东师范大学,上海200241

出　　处：《河南农业科学》2014年第4期48-50,55,共4页Journal of Henan Agricultural Sciences

摘　　要：为了提高盐碱地中大豆的产量,以大豆品种晋豆1号为试验材料,研究了NaCl胁迫下不同质量浓度精胺(Spm)、亚精胺(Spd)和腐胺(Put)对大豆幼苗生长性状、质膜透性以及酶活性的影响。结果表明:在100mmol/L的NaCl胁迫下,大豆幼苗的株高和主根长相对生长率、过氧化物酶活性、过氧化氢酶活性均降低,电解质相对电导率升高。喷施外源多胺可以缓解盐胁迫对大豆幼苗生长的抑制作用,其中100mg/L Spd、150mg/L Spm和150mg/L Put作用效果较佳。100mg/L Spd对主根长相对生长率的提高效果最好,比单纯NaCl胁迫提高了650.00%;150mg/L Spm对过氧化物酶活性和过氧化氢酶活性的提高作用最明显,分别比NaCl胁迫下高出39.66%和57.94%;150mg/L Put处理后,株高相对生长率比NaCl胁迫下提高了42.86%,同时电解质相对电导率降低35.23%。外源多胺在适宜质量浓度范围内对盐胁迫下大豆幼苗表现出的毒害性状具有一定的缓解作用。In order to improve the soybean yield in saline alkali soil,the soybean cultivar Jindou No. 1 was chosen as experimental material,and the effects of different kinds and concentrations of exogenous polyamines on the growth of soybean seedlings,membrane permeability and protective enzyme activities of soybean leaves under salt stress were studied. The results showed that under the stress of 100 mmol/L NaC1, the relative growth rates of plant height and main roots, the activities of peroxidase and catalase reduced,but the relative electric conductivity increased. The suppressive effects of salt stress on soybean seedlings could be alleviated by spraying exogenous spermine（Spm） ,spermidine（Spd）,putrescine（Put）,and the alleviative effects of 100 mg/L Spd, 150 mg/L Spm and 150 mg/L Put were significant. 100 mg/L Spd enhanced the taproot relative growth rate most, increased by 650.00~ compared to NaC1 stress; 150 mg/L Spm showed best enhancement effect on peroxidase activity and catalase activity,with 39.66~//00 and 57.94% higher than that of NaC1 stress, respectively; 150 mg/L Put made plant height relative growth rate increase by 42.86 %, and relative electric conductivity reduce by 35. 23% compared with NaCI stress. In a word, suitable concentration of exogenous polyamine has ability to relieve the poisoned characters of soybean under salt stress.

关 键 词：大豆幼苗 盐胁迫 精胺 亚精胺 腐胺 

分 类 号：S565.1[农业科学—作物学]