外源Spd对盐胁迫下非洲凤仙叶绿素含量及荧光特性的影响

Effect of exogenous Spd on chlorophyll content and fluorescence characteristics of Impatiens wallerana Hook.f.under salt stress

摘要: 以非洲凤仙(Impatiens wallerana Hook.f.) 花期苗为试材,研究100 mmol/LNaCl胁迫下不同浓度外源亚精胺(Spd)对其叶绿素含量及荧光特性影响.结果表明:外源Spd(0.6 mmol/L)可显著提高盐胁迫下非洲凤仙叶片光合色素含量,光合荧光参数Fv/Fm、ETR、Y、qP升高,Fo降低.因此,Spd可有效缓解NaCl胁迫对非洲凤仙花的伤害.

Abstract: Using Impatiens wallerana Hook.f. flowering stage seedlings as test materials, the effects of different concentrations of exogenous arginine (Spd) on its chlorophyll content and fluorescence characteristics were studied under 100mmol/L NaCl stress. The results showed that exogenous Spd (0.6mmol/L) could significantly increase the photosynthetic pigment content of Impatiens wallerana Hook.f. leaves under NaCl stress, and the photosynthetic fluorescence parameters Fv/Fm, ETR, Y, qP increased, while Fo decreased. Therefore, Spd can effectively alleviate the damage of NaCl stress to Impatiens wallerana Hook.f.