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当前位置: 首页 > 文章 > 外源α-萘乙酸对花期长期干旱大豆叶片抗氧化系统的影响 应用生态学报 2015,26 (6) 1718-1726
Position: Home > Articles > Effects of exogenous α-naphthaleneacetic acid on the antioxidation system in soybean leaves subjected to long-term drought stress during flowering Chinese Journal of Applied Ecology 2015,26 (6) 1718-1726

外源α-萘乙酸对花期长期干旱大豆叶片抗氧化系统的影响

作  者：
江洪强;邢兴华;周琴;江海东
单  位：
南京农业大学农业部南方作物生理生态重点开放实验室
关键词：
大豆;干旱;α-萘乙酸;抗氧化系统
摘  要：
以不同耐旱型品种‘南农99-6’和‘科丰1号’大豆为材料,2012年在南京农业大学牌楼试验站进行为期110 d的盆栽试验,研究大豆花期叶面喷施α-萘乙酸(NAA)对长期干旱条件下大豆植株抗氧化系统的影响.结果表明:干旱胁迫显著降低了大豆地上部干物质量,叶片中丙二醛(MDA)含量及活性氧(ROS)水平显著升高,同时,超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)、抗坏血酸过氧化物酶(APX)、单脱氢抗坏血酸还原酶(MDHAR)、谷胱甘肽还原酶(GR)和谷胱甘肽过氧化物酶(GPX)活性,还原型抗坏血酸(As A)、还原型谷胱甘肽(GSH)含量及As A/DHA(双脱氢抗坏血酸)和GSH/GSSG(氧化型谷胱甘肽)比值显著升高,其中‘科丰1号’大豆的抗氧化能力更高,从而维持较低的ROS水平和MDA含量.NAA可显著提高叶片中的APX、POD、CAT、MDHAR活性及As A/DHA、GSH/GSSG比值,其中‘科丰1号’大豆叶片的脱氢抗坏血栓还原酶(DHAR)活性和As A含量极显著增加.
译  名：
Effects of exogenous α-naphthaleneacetic acid on the antioxidation system in soybean leaves subjected to long-term drought stress during flowering
作  者：
JIANG Hong-qiang;XING Xing-hua;ZHOU Qin;JIANG Hai-dong;Ministry of Agriculture Key Laboratory of Southern Crop Physiology and Ecology,Nanjing Agricultural University;
关键词：
soybean;;drought stress;;NAA;;antioxidant system
摘  要：
Two different drought tolerance soybean(Glycine max) varieties(Nannong 99-6 and Kefeng 1) were used to study the effects of α-naphthaleneacetic acid(NAA) on the antioxidation system under long-term drought stress after flowering with pot experiment,which lasted for 110 days at Pailou Experiment Station,Nanjing Agricultural University,in 2012.The results showed that long-term stress decreased the shoot dry mass significantly,however,increased the level of reactive oxygen species(ROS) and malondialdehyde(MDA) content.It also obviously increased the activities of superoxide dismutase(SOD),peroxidase(POD),catalase(CAT),ascorbate peroxidase(APX),monodehydroascorbate reductase(MDHAR),glutathione reductase(GR) and glutathione peroxidase(GPX).The contents of ascorbic acid(As A) and glutathione(GSH),and the ratios of As A/DHA(dehydroascorbic acid) and GSH/GSSG(L-glutathione oxidized) were obviously enhanced.Kefeng 1 showed a higher antioxidation ability than Nannong 99-6,and could consequently maintain lower ROS and MDA levels.NAA distinctly enhanced the activities of APX,POD,CAT,MDHAR,GPX,and ratios of As A/DHA and GSH/GSSG,while decreased the levels of ROS and MDA.The As A content and dehydroascorbate reductase(DHAR) activity were significantly increased in Kefeng 1.

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