摘要
目的:研究重金属镉胁迫下葡萄糖醛酸产生菌Pseudomonas sp.LP20对乙烯合成及水稻镉毒害的影响。方法:通过单因素设计,分别从植株叶绿素含量、乙烯产量、重金属镉含量测定等方面探讨Pseudomonas sp.LP20对镉胁迫下水稻的影响。结果:Pseudomonas sp.LP20显著抑制乙烯合成,同时抑制植株对镉的吸收。用乙烯前体物质1-氨基环丙基羧酸(ACC)处理消除了Pseudomonas sp.LP20或葡萄糖醛酸诱导的水稻中镉积累的抑制作用,然而用乙烯生物合成抑制剂氨基乙氧基乙烯基甘氨酸(AVG)处理显著减少了植物中镉的积累。结论:Pseudomonas sp.LP20分泌的葡萄糖醛酸抑制乙烯的生物合成,从而减少水稻根系中镉的积累。
Objective:To study the effect of a glucuronic acid-producing Pseudomonas sp.LP20 on ethylene synthesis and cadmium toxicity in rice under heavy metal cadmium stress.Methods:Through single factor design,the effects of Pseudomonas sp.LP20 on rice under cadmium stress were investigated from the aspects of chlorophyll content,ethylene production,and heavy metal cadmium content.Results:In this study,Pseudomonas sp.LP20 significantly inhibited ethylene synthesis and simultaneously inhibited plant uptake of cadmium.However,treatment with the ethylene precursor 1-aminocyclopropylcarboxylic acid(ACC)almost abolished the inhibitory effect of Pseudomonas sp.LP20 or glucuronic acid-induced cadmium accumulation in rice.Treatment with the ethylene biosynthesis inhibitoraminoethoxyvinylglycine(AVG)significantly reduced cadmium accumulation in plants.Conclusion:The glucuronic acid secreted by Pseudomonas sp.LP20 inhibits ethylene biosynthesis and thus reduces cadmium accumulation in rice roots.
作者
肖兵
黄家梦
陆晓民
XIAO Bing;HUANG Jiameng;LU Xiaomin(College of Agriculture,Anhui Science and Technology University,Fengyang 233100,China)
出处
《安徽科技学院学报》
2023年第1期31-36,共6页
Journal of Anhui Science and Technology University
基金
安徽省科技重大专项(201903a06020023)。
关键词
水稻
镉胁迫
葡萄糖醛酸
Rice
Cadmium stress
Glucuronic acid
