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- Title
IAA production by Bacillus sp. JH 2-2 promotes Indian mustard growth in the presence of hexavalent chromium.
- Authors
Shim, Jaehong; Kim, Jin‐Won; Shea, Patrick J.; Oh, Byung‐Taek
- Abstract
Bacillus sp. strain JH 2-2, isolated from the rhizosphere of plants at a multi-metal contaminated mine site, has the potential to reduce Cr(VI) to Cr(III) and promote plant growth by reducing Cr toxicity and producing IAA. The minimum inhibitory concentration of Cr(VI) to Bacillus sp. JH 2-2 was 1000 mg L−1 and the strain reduced 99% of 10 mg Cr(VI) L−1 to Cr(IV) within 24 h. Lower Cr(VI) stress (10 mg L−1) stimulated IAA production, but much less IAA was produced at 30 or 50 mg Cr(VI) L−1. Inoculation with Bacillus sp. JH 2-2 increased the length of Brassica juncea L. roots by 364% and stems by 735% in the presence of 10 mg Cr(VI) L−1 from those of uninoculated control plants. These findings suggest potential use of Bacillus sp. JH 2-2 to promote phytoremediation of soil contaminated with Cr(VI).
- Subjects
BRASSICA juncea; BACILLUS (Bacteria); RHIZOSPHERE microbiology; HEXAVALENT chromium; PHYTOREMEDIATION
- Publication
Journal of Basic Microbiology, 2015, Vol 55, Issue 5, p652
- ISSN
0233-111X
- Publication type
Article
- DOI
10.1002/jobm.201400311