Alleviation of Salt-Induced Adverse Effects on Gas Exchange, Photosynthetic Pigments Content and Chloroplast Ultrastructure in Gerbera Jamesonii L. by Exogenous Salicylic Acid Application

Aims: The effects of exogenously applied salicylic acid (SA) on gas exchange characteristics, photosynthetic pigments and chloroplast ultrastructure were investigated in gerbera at their reproductive stage under salt-stressed conditions.
 Methodology: A pot experiment was conducted glasshouse conditions the Zhejiang University, Hangzhou, China, (30° N/120° E) between February 2008 March 2009.Plants, pretreated with foliar applications 0, 0.5, 1.0 mmoldm-3 SA onset flower initiation irrigated 100 mmoldm-3NaCl(aq) for two weeks, starting after three days from pretreatment. Control did not receive either NaCl or SA.Photosynthetic rate, exchange, content against treatments. All data subjected to analysis variance (ANOVA) Generalized Linear Model (GLM) using SAS statistical software. Pearson’s correlation test carried out study relationships among parameters. means compared Duncan’s multiple range (DMRT). For all tests, P< .05 considered statistically significant.
 Results: Salt stress adversely affected pigment contents ultrastructure. application significantly increased net photosynthesis, stomatal conductivity, intra-cellular CO2 transpiration rate but decreased limitation, those untreated plants. Further, enhanced notably undamaged evident ameliorative system salt stress. Of concentrations tested, 0.5 concentration seemed have greater effect throughout showing no significant variation control some attributes (chlorophyll ultrastructure).
 Conclusion: Responses plants spraying them plausibly suggest SA-induced enhancement as another target conferring tolerance crop