Growth of Brassica juncea under chromium stress: influence of siderophores and indole 3 acetic acid producing rhizosphere bacteria.
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.
Rajkumar
M
M
Division of Bioresource Science, College of Agriculture, Chonbuk National University, Jeonju-561-756, South Korea.
Lee
Kui Jae
KJ
Lee
Wang Hyu
WH
Banu
J Rajesh
JR
D001407:Bacillus / Q000378:metabolism*; D002857:Chromium / Q000633:toxicity*; D007210:Indoleacetic Acids / Q000378:metabolism*; D009149:Mustard Plant / Q000187:drug effects* / Q000254:growth & development* / Q000378:metabolism; D010937:Plant Growth Regulators / Q000378:metabolism*; D011549:Pseudomonas / Q000378:metabolism*; D017262:Siderophores / Q000378:metabolism*; D012988:Soil Microbiology
D007210:Indoleacetic Acids; D010937:Plant Growth Regulators; D017262:Siderophores; D002857:Chromium; C030737:indoleacetic acid