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《Plant Physiology Journal》 2018-04
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Principal component analysis on the alleviating effects of different concentrations of CaCl_2 on ‘Tamina' grape under NaCl stress

TAN Wei;LI Xiao-Mei;DONG Zhi-Gang;TAN Min;TANG Xiao-Ping;Institute of Pomology, Shanxi Academy of Agricultural Sciences,Shanxi Key Laboratory of Germplasm, Improvement and Utilization in Pomology;  
This study aimed to study the alleviating effects of calcium on grape under salt stress.The annual of grapes(Vitis vinifera L.‘Tamina’)grown on the sand were the experimental materials.Then the effects of different CaCl_2 concentrations on physiological properties of grape seedling were studied under 200 mmol·L~(-1)NaCl stress.The results showed that,under 200 mmol·L~(-1) NaCl stress,the relative conductivity of roots and leaves,O_2ˉ·production rate,H_2O_2 content of grape leaves increased significantly,while the SOD,CAT,POD,APX activities of grape leaves,shoot length and total plant biomass decreased significantly.Compared with the NaCl stress,5 and 10 mmol·L~(-1) CaCl_2 significantly decreased the relative conductivity of roots and leaves,O_2ˉ·production rate,H_2O_2 content of grape leaves.Exogenous CaCl_2 significantly alleviated the decrease of SOD and CAT activity under NaCl stress,15 mmol·L~(-1) CaCl_2 significantly increased the POD activity,while 10,15and 20 mmol·L~(-1) CaCl_2 significantly increased the APX activity under NaCl stress.Under high concentration(25 mmol·L~(-1))of CaCl_2 treatment,the relative conductivity,O_2ˉ·production rate,H_2O_2 content of grape leaves were significantly higher than those of NaCl stress.However,there were no significant differences in the POD and APX activities,shoot length and total plant biomass between the treatment and NaCl stress.Principal component analysis results showed that the 10 mmol·L~(-1) was the appropriate concentration of CaCl_2 which relieving the damage of 200 mmol·L~(-1) NaCl on grapes,that might be related with the higher activities of antioxidant enzymes and less accumulation of reactive oxygen species.
【Fund】: 山西省农业科学院农业科技创新研究课题(ZDSYS1505)、山西省农业科学院院优势课题组项目(YYS1704);; 山西省重点研发计划重点项目(201603D21105)~~
【CateGory Index】: S663.1
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