农业环境科学学报2012，Vol.31Issue(1)：67-74,8.
植物根际促生菌(PGPR)对缓解水稻受土壤锌胁迫的作用
Application of Plant Growth-promoting Rhizobacteria(PGPR) for Reducing Zinc Stress on Paddy Rice
摘要
Abstract
The heavy metal pollution in soils has become an increasing problem in China. This study focused on the application of plant growth-promoting rizobacteria( PGPR) to reduce heavy metal stress on crops. One Pb2+,Cd2+, Cu2+, Zn2+ resistant bacteria, Bacillus sp. DBM, was isolated from contaminated soils of Dabao Mountain. Strain DBM showed some plant growth promoting properties such as producing in-dole-3-acetic acid(IAA)and l-aminocyclopropane-l-carboxylate(ACC)deaminase, but it could not produce siderophores. A pot experiment was conducted to study the effects of strain DBM on the plant growth and heavy metal uptake of paddy rice grown in different levels of Zn-contaminated soils. Results showed that the inoculation with strain DBM remarkably increased the growth of host plant, but did not enhance Zn extraction by rice. Growing in the soils with 600 mg · kg-1 Zn, the dry weights of shoot and root of rice treated with strain DBM increased by 97.8% and 77.2%, respectively, and the Zn concentrations in the shoot and root were reduced by 15.1% and 19.9%, respectively, compared to the non-inoculated control. However, total Zn uptakes both in the shoot and root of rice still increased by 74.2% and 48.6%, respectively, which mostly attributed to the remarkable promotion of plant growth by strain DBM.关键词
植物根际促生菌(PGPR)/水稻/重金属Key words
plant growth-promoting rhizobacteria(PGPR)/paddy rice/heavy metal分类
资源环境引用本文复制引用
陈佛保,柏珺,林庆祺,王诗忠,杨秀虹,仇荣亮..植物根际促生菌(PGPR)对缓解水稻受土壤锌胁迫的作用[J].农业环境科学学报,2012,31(1):67-74,8.基金项目
国家自然科学基金-广东联合基金重点项目(U0833004) （U0833004）
