, Volume 26, Issue 6, pp 487-491

Growth promotion of red pepper plug seedlings and the production of gibberellins by Bacillus cereus , Bacillus macroides and Bacillus pumilus

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The growth of red pepper plug seedlings was promoted by Bacillus cereus MJ-1, B. macroides CJ-29, and B. pumilus CJ-69 isolated from the rhizosphere. Gibberellins (GAs), a well-known plant growth-promoting hormone, were detected in the culture broth of their rhizobacteria. Among the GAs, the contents of GA1, GA3, GA4, and GA7, physiologically active GAs, were comparatively higher than those of others, suggesting that the growth promoting effect was originated from the GAs. This is the first report on the production of GA5, GA8, GA34, GA44, and GA53 by bacteria.