| The changes of the betaine contents, the kinetic parameters of chlorophyll fluorescence and the contents of chloroplast pigments in the leaves of Lycium Brbarum L. were studied with different salt treatments. The results showed that as the salt concentration increased, the fluorescent parameters of chlorophyll (Fm,Fv,Fv/Fm,Fm/Fo, and Fv/Fo) appeared to decline and the contents of chloroplast pigments (chla,chlb,car,chla/chlb) appeared to rise in the range of low salt concentration ({0.3%} NaCl) and decrease in the range of high salt concentration (0.6%~0.9% NaCl); each and all parameters first decreased and then rose as the stress prolonged, and the ratios of carotenoid to chlorophyll gradually increased with increased salt concentration and prolonged stress. Betaine tended to gradually accumulate in the leaves of Lycium Brbarum L. with increased salt concentration and prolonged stress. It was primarily proved that betaine accumulation related to chlorophyll fluorescence and chloroplast pigments in the leaves of Lycium Brbarum L., which could be one of the reasons why Lycium Brbarum L. is salt resistant. |