铝胁迫下苹果酸对灰木莲幼苗生理特性的影响  

Effects of Malic Acid on the Physiological Characteristics of Magnoliaceae glance Blume Seedlings under Aluminum Stress

作　　者：禤俊卿 谢慈江 石驭天 申礼凤 杨梅 何春 XUAN Junqing;XIE Cijiang;SHI Yutian;SHEN Lifeng;YANG Mei;HE Chun(Guangxi Gaofeng State Owned Forest Farm,Nanning,Guangxi 530000,China;College of Forestry,Guangxi Univer-sity/Guangxi Colleges and Universities Key Laboratory for Forestry Science and Engineering,Nanning,Guangxi 530004,China)

机构地区：[1]广西国有高峰林场,广西南宁530000 [2]广西大学林学院/广西高等学校林业科学与工程重点实验室,广西南宁530004

出　　处：《热带农业科学》2023年第9期27-33,共7页Chinese Journal of Tropical Agriculture

基　　金：广西自筹经费林业科技项目“红锥人工林土壤功能微生物筛选与应用研究”(No.桂林科研[2022ZC]第30号)。

摘　　要：为了解灰木莲(Magnoliaceae glance Blume)幼苗对酸铝复合胁迫的生理适应性,以灰木莲幼苗为试验对象,采用不同浓度的苹果酸(0、5、10、15 mmol/L)和铝(0、60、120、150 mg/L)模拟酸铝复合胁迫,测定幼苗叶绿素、MDA、可溶性糖、可溶性蛋白含量和POD、SOD、CAT活性。结果表明,相同铝浓度下,添加中低浓度苹果酸处理的灰木莲叶绿素a、叶绿素b和叶绿素总量普遍高于未添加苹果酸处理,MDA、可溶性糖和可溶性蛋白含量均随苹果酸浓度增加呈先升高后下降的变化趋势,中低浓度的苹果酸(5、10mmol/L)能够增加中低铝浓度(60、120mg/L)处理下灰木莲的POD和CAT活性。10 mmol/L苹果酸能够有效缓解灰木莲受到的浓度为150 mg/L的铝胁迫,5 mmol/L苹果酸能够有效缓解灰木莲受到的浓度为60和120 mg/L的铝胁迫。To understand the adaptability of Magnoliaceae glance Blume seedlings to acid-aluminum compound stress,M.glance seedlings were used as experimental objects in different concentrations of malic acid(0,5,10,15 mmol×L^(-1))and alu-minum(0,60,120,150 mg×L^(-1)),and the chlorophyll,MDA,soluble sugar,and soluble protein content,and POD,SOD,and CAT activities of seedlings were determined.The results showed that under the same aluminum concentration,the chlorophyll a,chlorophyll b,and total chlorophyll of M.glance in the treatments with medium and low malic acid concentrations were generally higher than those without malic acid.The concentrations showed a trend of first increasing and then decreasing.The medium and low malic acid concentrations(5 and 10 mmol×L^(-1))could increase the low and medium aluminum concentrations(60,120 mg×L^(-1))under the treatment.In conclusion,10 mmol×L^(-1) malic acid can effectively alleviate the Al stress of 150 mg×L^(-1),and 5 mmol×L^(-1) malic acid can effectively remit the Al stress of 60-120 mg×L^(-1) aluminum stress.

关 键 词：酸铝胁迫 灰木莲 苹果酸 生理特性 

分 类 号：S792.99[农业科学—林木遗传育种]