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Journal of Bacteriology, August 2000, p. 4644-4646, Vol. 182, No. 16
0021-9193/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Flavonoid-Induced Expression of a Symbiosis-Related Gene in the Cyanobacterium Nostoc punctiforme

Michael F. Cohendagger and Hideo Yamasaki*

Laboratory of Cell and Functional Biology, Faculty of Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan

Received 13 March 2000/Accepted 7 May 2000

The flavonoid naringin was found to induce the expression of hrmA, a gene with a symbiotic phenotype in the cyanobacterium Nostoc punctiforme. A comparative analysis of several flavonoids revealed the 7-O-neohesperidoside, 4'-OH, and C-2-C-3 double bond in naringin as structural determinants of its hrmA-inducing activity.

* Corresponding author. Mailing address: Laboratory of Cell and Functional Biology, Faculty of Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan. Phone: 81-98-895-8550. Fax: 81-98-895-8576. E-mail: yamasaki{at}sci.u-ryukyu.ac.jp.

dagger Permanent address: University of Maryland, Asian Division, APO AP 96368-5134.

Journal of Bacteriology, August 2000, p. 4644-4646, Vol. 182, No. 16
0021-9193/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.




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