锗对盐胁迫下大蒜幼苗生理特性的影响  

Effects of germanium on physiological characteristics of garlic seedlings under salt stress

作　　者：郑伟[1] 隋静[1] 郝树芹[1] ZHENG Wei SUI Jing HAO Shuqin(Laiwu Vocational and Technical College, Laiwu 271100, Shandong , China)

机构地区：[1]莱芜职业技术学院,山东莱芜271100

出　　处：《中国瓜菜》2017年第8期33-36,共4页China Cucurbits And Vegetables

基　　金：山东省自然科学基金青年基金项目"不同大蒜品种大蒜辣素含量与生态因子响应机制研究"(ZR2013CQ003)

摘　　要：以‘金蒜2号’为试材,通过叶面喷施0.60 g·L^(-1)的有机锗(Ge-132),研究了外源有机锗对盐胁迫下大蒜幼苗生长、叶片光合性能及抗氧化能力的影响。结果显示,叶面喷施有机锗溶液显著增加了盐胁迫下大蒜幼苗的株高和根长,分别增加了39.6%和34.8%;叶面喷施有机锗溶液也显著提高了盐胁迫下大蒜叶片叶绿素含量和净光合速率,叶面喷施有机锗溶液后大蒜叶片的叶绿素含量和净光合速率分别是盐胁迫下的1.46和1.57倍;同时,叶面喷施有机锗溶液也增强了盐胁迫下大蒜根系的抗氧化能力,其中,MDA和H_2O_2含量分别比盐胁迫下降低了21.9%和19.6%,SOD、POD、CAT和APX抗氧化酶活性则升高至盐胁迫下的1.42、1.27、1.49和1.43倍。因此,叶面喷施0.60 g·L^(-1)的有机锗溶液有利于提高盐胁迫下大蒜生长、光合效率和抗氧化能力。In this study, the effects of germanium on the growth, photosynthesis and oxidation resistance to salt stress of garlic cultivar ‘Jinsuan No. 2＇ seedlings were detected. The garlic seedlings were treated by 150 retool· L-1 NaCl and sprayed by 0.60 g· L-1 germanium solution. The results showed that after sprayed by 0.60 g· L-1 germanium solution, the height and root length of garlic seedlings under salt stress increased by 39.6% and 34.8%, the chlorophyll and net photosynthetic rate in garlic leaves under salt stress were increased 1.46 and 1.57 times. The oxidation resistance of garlic roots to salt stress was improved after the addition of 0.60 g · L-1 germanium. The contents of MDA and H202 were significantly decreased by 21.9 % and 19.6%. The activity of SOD, POD, CAT and APX were increased to 1.42, 1.27, 1.49 and 1.43 times of that under salt treatment. These results indicated that the 0.60 g· L-1 germanium enhanced the garlic growth, photosynthesis and oxidation resistance under salt stress.

关 键 词：大蒜 有机锗 光合作用 抗氧化 盐胁迫 

分 类 号：S633.4[农业科学—蔬菜学]