LPY6缓解镉对小麦毒害效应的研究  

Effect of Enterobacter Cloacae LPY6 on alleviation of the toxicity of cadmium to wheat growth

作　　者：夏影影 于燕燕 陶均[1] XIA Yingying;YU Yanyan;TAO Jun(Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources/College of Tropical Crops,Hainan University,Haikou,Hainan 570228,China)

机构地区：[1]海南大学海南省热带生物资源可持续利用重点实验室/热带作物学院,海口570228

出　　处：《热带生物学报》2023年第4期364-370,共7页Journal of Tropical Biology

基　　金：海南省自然科学基金项目(2019RC063)。

摘　　要：为了分析从阴沟肠杆菌Cu6驯化获得的高镉抗性菌株LPY6在镉(Cd)修复中的潜力和机制,为镉污染修复工程菌的开发提供依据,以小麦(Triticum aestivum)为材料,进行了种子萌发和盆栽实验,结果显示,LPY6可缓解镉对小麦生长的抑制作用。Cd^(2+)吸附特征实验表明,LPY6可以降低培养液中游离镉的浓度。此外,LPY6还可以降低土壤有效镉浓度和小麦幼苗中镉的积累。研究结果表明,LPY6可能通过吸附或内吸镉作用,降低土壤中有效镉的浓度,进而降低镉离子进入植物的可能性,提高植物在高镉环境中的生存能力。Soil cadmium pollution has attracted more attention in China,and calls for safe and effective remediation.Previously,we obtained a high cadmium-resistant strain Enterobacter cloacae LPY6 by domesticating E.cloacae Cu6.The strain LPY6 was used to treat seeds and plants of wheat(Triticum aestivum L.)in seed germination and pot experiments to analyze its potential and mechanism in alleviating the toxicity of cadmium to wheat growth.The seed germination and pot experiments found that LPY6 could reduce the toxic effects of cadmium on wheat seed germination and seedling growth,and decrease the cadmium levels in plants.In addition,LPY6 can also reduce the free cadmium contents in liquid media and in soils,suggesting LPY6 can adsorb or uptake cadmium from the soils and reduce the adsorption of available cadmium by plants.This indicates that LPY6 may be a potential strain for bioremediation of cadmium pollution.

关 键 词：阴沟肠杆菌 LPY6 镉污染 小麦 解毒能力 

分 类 号：S512.1[农业科学—作物学] X53[环境科学与工程—环境工程]