草业学报Issue(7)：97-105,9.DOI:10.11686/cyxb2014516
水杨酸对盐胁迫下百日草种子萌发及幼苗生理特性的影响
Effects of salicylic acid on seed germination and seedling physiological characteristics of Zinnia elegans under salt stress
摘要
Abstract
Zinnia elegans seed (cultivar “Fangfei No.1 ”)was treated with 100 mmol/L NaCl.The effects of different concentration of exogenous salicylic acid (SA:0,0.5,1.0,1.5,and 2.0 mmol/L)on salt stress-in-juries were investigated during seed germination and seedling growth.The results indicated that SA can effec-tively alleviate the injuries of salt stress on seed germination and seedling growth of Z .elegans .Salicylic acid increased germination vigour,germination percentage,germination index,and subsequently increased plant height,stem diameter,root∶shoot ratio,chlorophyll content,proline,soluble sugar and soluble protein con-tent and superoxide dismutase (SOD)and peroxide (POD)activity under salt stress.However,malondialde-hyde (MDA)content (indicator of oxidative stress)was decreased by salicylic acid.Salicylic acid concentration of 1.0 mmol/L produced the best effects whereas no mitigation effects were observed on seed germination or seedling growth under salt stress at 2.0 mmol/L salicylic acid.It is suggested that salicylic acid concentrations of 0.5-1.5 mmol/L could be used to alleviate salt stress-induced injuries.关键词
百日草/水杨酸/盐胁迫Key words
Zinnia elegans/salicylic acid/salt stress引用本文复制引用
黄玉梅,张杨雪,刘庆林,刘盼,黄胜岚..水杨酸对盐胁迫下百日草种子萌发及幼苗生理特性的影响[J].草业学报,2015,(7):97-105,9.基金项目
国家自然科学基金项目（31201649）资助。 （）
