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Updated: Jul 15, 2026

Plant-Microbe Interaction: Transcriptional Response of Bacillus Mycoides to Potato Root Exudates
Published on: July 2, 2018
Enhanced iturin A production by Bacillus subtilis and its effect on suppression of the plant pathogen Rhizoctonia
1Chemical Resources Laboratory, Tokyo Institute of Technology, R1-29-4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan.
Abstract:
Enhanced production of the antibiotic iturin A by Bacillus subtilis RB14-CS reached 4.4 g L(-1) in SM medium containing soybean meal and maltose, which was 16-fold and 2.2-fold higher than that in original and modified number 3S media, respectively. When various volumes of RB14-CS cultures grown in SM medium were applied to pot tests of tomato damping-off caused by Rhizoctonia solani, damping-off was dose-dependently suppressed by the cultures. Suppression by SM-grown cultures was significantly more effective than that by cultures grown in original or modified number 3S media. The iturin A concentrations in soil decreased to undetectable levels after 17 days of cultivation in pot tests, indicating that iturin A has a low persistence in soil.
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