天津农业科学2018，Vol.24Issue(4)：1-5,5.DOI:10.3969/j.issn.1006-6500.2018.04..001
外施Ca2+对盐胁迫下珠美海棠组培苗光合特性的影响
Effects of Exogenous Ca2+on Photosynthetic Characteristics of Tissue Cultured Seedlings of Malus zumi under Salt Stress
摘要
Abstract
To study the mitigation effect of Ca2+on plant injury under salt stress,the effects of additional Ca2+on photosynthetic char-acteristics of Malus zumi under salt stress were studied by pot culture method. Two factors randomized block design was used, which included 4 NaCl concentration gradient (0,100,200,300 mmol·L-1),and 5 Ca2+concentration gradient (0,5,10,15,20 mmol·L-1), the pigment and photosynthetic indices of M.zumi were measured and analyzed.The results showed as follows: (1)under single NaCl stress or Ca2+treatments,the chlorophyll a and b contents of Malus zumi were increased and then decreased and the maximum was at 200 mmol·L-1and 15 mmol·L-1,respectively;(2)Under single NaCl stress,the Pn,Gs and Tr of Malus zumi were also increased and then decreased while the trend of Ci was contrary, the maximum of Pn, Gs and Tr or the minimum of Ci was at NaCl 100 mmol·L-1;(3)When NaCl concentration was 200 mmol·L-1and 300 mmol·L-1,the suitable Ca2+could relieve the injury of salt on photosynthetic indices of Malus zumi,and the optimum Ca2+were 15 and 10 mmol·L-1respectively.The results could provide reference for introduc-tion and cultivation of Malus zumi in coastal saline-alkali land.关键词
珠美海棠/盐胁迫/外施Ca2+/光合特性Key words
Malus zumi/salt stress/additional Ca2+/photosynthetic characteristics分类
农业科技引用本文复制引用
秦家慧,李颖华,范航伟,孙敏,彭立新..外施Ca2+对盐胁迫下珠美海棠组培苗光合特性的影响[J].天津农业科学,2018,24(4):1-5,5.基金项目
国家自然科学基金项目(30671440) （30671440）
