摘要
以生菜幼苗为材料,采用溶液培养,研究外源水杨酸(salicyli cacid,SA)对不同浓度(50、100、150、200mmol/L)NaCl胁迫下生菜幼苗生长和叶片光合特性的影响.结果表明,NaC1胁迫显著降低了生菜植株生长量、净光合速率、气孔导度、叶绿素含量,其中叶绿素a含量降低幅度最大;外源SA显著提高了盐胁迫下生菜幼苗叶片叶绿素含量、净光合速率、气孔导度,增强了盐胁迫下生菜植株的光合能力,从而使植株生长量明显提高,有效增强了生菜的抗盐能力.
Using lettuce seedlings as material, effects of exogenous salicylic acid on seedlings growth and photosynthetic characteristics in lettuce seedlings under NaCI stress were studied by hydroponic experiments. The results showed NaCI stress decreased the growth rate, net photosynthesis （Pn）, stomatal conductance （Gs） and the content of chlorophyll, especially that of chlorophyll a, of lettuce plants significantly. Salicylic acid could improve the content of chlorophyll, net photosynthesis （Pn）, stomatal conductance （Gs） of NaCl-stressed lettuce plants. It was suggested that salicylic acid can significantly alleviate the injury of NaCl stress to lettuce seedlings and increase seedling growth, enhance the photosynthesis.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第6期628-631,共4页
Journal of Hunan Agricultural University(Natural Sciences)
基金
贵州省科技攻关项目(NY20083021)
贵州省省长基金项目(200805)
贵州省自然科学基金项目(20072053)
关键词
盐胁迫
水杨酸
生菜
光合作用
salt stress
salicylic acid
lettuce
photosynthesis
