Rajkumar M, Lee Kui Jae, Lee Wang Hyu, Banu J Rajesh
Division of Bioresource Science, College of Agriculture, Chonbuk National University, Jeonju-561-756, South Korea.
J Environ Biol. 2005 Oct;26(4):693-9.
Plant growth promoting rhizobacterial (PGPR) strains A3 and S32 have been shown to promote the growth of Brassica juncea under chromium stress which has been related to the microbial production of siderophores and indole 3 acetic acid (IAA). The aim of the present study is to evaluate the importance of siderophores and IAA producing PGPR on the growth of Brassica juncea under chromium stress. The production of IAA and siderophores were observed in the strains A3 and S32, respectively. Both PGPR strains promote the growth of Brassica juncea under chromium stress. The maximum growth was observed in plants inoculated with siderophores producing strain 32. Both the bacterial inoculum did not influence the uptake of chromium by plants. The present observation showed that PGPR isolates A3 and S32 are capable of protecting the plants against the inhibitory effects of chromium by producing the siderophores and IAA.
植物促生根际细菌（PGPR）菌株A3和S32已被证明在铬胁迫下能促进芥菜的生长，这与微生物产生铁载体和吲哚-3-乙酸（IAA）有关。本研究的目的是评估产生铁载体和IAA的PGPR对铬胁迫下芥菜生长的重要性。分别在菌株A3和S32中观察到IAA和铁载体的产生。两种PGPR菌株在铬胁迫下均能促进芥菜的生长。在用产生铁载体的菌株32接种的植物中观察到最大生长。两种细菌接种物均未影响植物对铬的吸收。目前的观察结果表明，PGPR分离株A3和S32能够通过产生铁载体和IAA保护植物免受铬的抑制作用。
