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《Scientia Agricultura Sinica》 2011-15
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Effects of Exogenous Salicylic Acid on Ions Contents and Net Photosynthetic Rate in Chrysanthemum Under Salt Stress

GUO Chun-xiao1,WANG Wen-li1,3,ZHENG Cheng-shu1,2,3,SHI Lian-hui2,3,4,SHU Huai-rui1,2,5(1College of Horticulture Science and Engineering,Shandong Agricultural University,Taian 271018,Shandong;2State Key Laboratory of Crop Biology,Taian 271018,Shandong;3Chinese National Engineering Research Center for Slow/Controlled Release Fertilizer,Shandong Agricultural University,Taian 271018,Shandong;4College of Resource and Environment,Shandong Agricultural University,Taian 271018,Shandong;5Research Center for Apple Engineering and Technology,Taian 271018,Shandong)  
【Objective】The aim of this experiment was to analyze the alleviation mechanism of exogenous SA on chrysanthemum under salt stress.【Method】The effects of salicylic acid(SA) on contents of Na+,K+,Ca2+,Mg2+ in roots,leaves of chrysanthemum and net photosynthetic rate(Pn) were studied with spraying exogenous SA on leaves.【Result】The results showed that salt stress increased the content of Na+,but reduced the contents of K+,Ca2+,Mg2+ in roots and leaves of chrysanthemum.Exogenous SA treatment increased K+,Ca2+,Mg2+ contents by 37.70%,16.44% and 20.54%,respectively,decreased Na+ content by 27.13% in the roots;increased the contents of K+,Ca2+,Mg2+ and Pn by 56.52%,53.23%,87.53% and 40.74%,respectively,decreased Na+ contents by 53.41% in leaves;increased the contents of K+,Ca2+,Mg2+ by 67.97%,79.40% and 89.32%,respectively,decreased Na+ contents by 76.06% in the chrysanthemum at the 10th day after stress treatments.SK,Na,SCa,Na and SMg,Na were also significantly increased by exogenous SA under salt stress.Correlation analysis showed that the Pn has significant negative correlation with Na+ and significant positive correlations with K+,Ca2+,Mg2+.【Conclusion】These results indicated that exogenous SA may alleviate the damage of chrysanthemum seedlings from salt stress via ion selective absorption and transportation.
【Fund】: 国家“十二五”科技支撑计划项目(201BAD11B01 2011BAD11B02);; 国家苹果产业技术体系项目(CARS-28);; 山东省优秀中青年科学家科研奖励基金项目(BS2010NY019)
【CateGory Index】: S682.11
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