---

作 者 ：孙德智1,2,何淑平3,彭 靖2,范 富1,杨恒山1,韩晓日2

期 刊 ：西北植物学报 2013年 3期 页码：541~546

关键词：水杨酸；硝普钠；番茄；盐胁迫；协同增效作用；

Keywords:salicylic acid, sodium nitropprusside, tomato, salt stress, synergies,

摘 要 ：以番茄品种‘秦丰保冠’为试材,采用营养液培养法,研究单独和复配施用外源水杨酸（SA）、一氧化氮（NO）供体硝普钠（SNP）对100 mmol·L^-1 NaCl胁迫下番茄幼苗生长及生理特性的影响。结果显示:SA、SNP、SA+SNP处理均能显著提高盐胁迫下番茄幼苗叶片保护酶（SOD、POD、CAT）活性、脯氨酸和叶绿素含量、幼苗根系活力,并显著降低叶片电解质渗漏率及丙二醛（MDA）含量,有效减轻盐胁迫对幼苗造成的伤害,促进幼苗的生长发育,其中SA+SNP复配处理效果最好。研究表明,外源SA和SNP处理均能通过提高番茄幼苗保护酶活性和脯氨酸含量来有效缓解盐胁迫伤害,且SA+SNP复配处理在提高番茄幼苗耐盐性方面具有协同增效作用。

Abstract:Using tomato variety ‘Qin Feng Bao Guan’ as experimental material and by the method of hydroponics nutrient solution,we studied the effects of single and compound application of salicylic acid (SA) and sodium nitropprusside (SNP an exogenous nitric oxide donor) on tomato seedling growth and physiological characteristics under the 100 mmol·L^-1 NaCl stress.The results showed as follows:single and compound application of SA or SNP could significantly promote activities of seedling leaf protective enzymes (SOD,POD,CAT),enhance the content of chlorophyll and proline and the vitality of seedling roots and decrease leaves electrolyte leakage and the content of malondialdehyde (MDA),which could alleviate the damage to seedling caused by salt stress and promote the growth and development of seedling and the compound application of SA and SNP which is the best has a certain synergy to improve the salt tolerance of tomato seedlings.

---