Growth and Cd Accumulation of Orychophragmus violaceus as Affected by Inoculation of Cd-Tolerant Bacterial Strains

作     者：LIANG Xia HE Chi-Quan NI Gang TANG Gui-E CHEN Xue-Ping LEI Yan-Ru 

作者机构：School of Environmental and Chemical Engineering Shanghai University 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2014年第24卷第3期

页      面：322-329页

核心收录：

学科分类：07[理学] 0818[工学-地质资源与地质工程] 09[农学] 0903[农学-农业资源与环境] 0901[农学-作物学] 0713[理学-生态学] 

基　　金：Supported by the National Natural Science Foundation of China(Nos.40771203 and 40871243) the Shanghai Key Laboratory of Bio-Energy Crops,China(No.10DZ2271800) the Shanghai Leading Academic Discipline Project,China(No.S30109) 

主　　题：诸葛菜属 根际细菌 镉积累 接种 菌株 枯草芽胞杆菌 巨大芽孢杆菌 地上部生物量 

摘      要：Beneficial interactions between microorganisms and plants, particularly in the rhizosphere, are a research area of global interest. Four cadmium(Cd)-tolerant bacterial strains were isolated from heavy metal-contaminated sludge and their effects on Cd mobility in soil and the root elongation and Cd accumulation of Orychophragmus violaceus were explored to identify the capability of metalresistant rhizobacteria for promoting the growth of O. violaceus roots on Cd-contaminated soils. The isolated strains, namely, Bacillus subtilis, B. cereus, B. megaterium, and Pseudomonas aeruginosa, significantly enhanced the plant Cd accumulation. The Cd concentrations in the roots and shoots were increased by up to 2.29- and 2.86-fold, respectively, by inoculation of B. megaterium, as compared with the uninoculated control. The bacterial strains displayed different effects on the shoot biomass. Compared with the uninoculated plants, the shoot biomass of the inoculated plants was slightly increased by B. megaterium and significantly decreased by the other strains. B. megaterium was identified as the best candidate for enhancing Cd accumulation in O. violaceus. Thus, this study provides novel insight into the development of plant-microbe systems for phytoremediation.