Production of a Gibberellin-like Substance by Arthrobacter globiformis


THE ability to synthesize plant growth substances such as indolyl-3-acetic acid (IAA) is widely distributed among micro-organisms. But the production of gibberellins appears to be much more restricted, fungi of the genus Gibberella being the chief microbial source. However, in recent work on IAA production by species of Arthrobacter1 we detected another growth-promoting zone on chromatograms of culture filtrates by means of a modified Avena coleoptile section test. These observations along with a report of gibberellic acid production by Azotobacter2 prompted further work on the synthesis of gibberellin-like substances by Arthrobacter.

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KATZNELSON, H., SIROIS, J. & COLE, S. Production of a Gibberellin-like Substance by Arthrobacter globiformis. Nature 196, 1012–1013 (1962).

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