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Journal of Bacteriology, January 2001, p. 393-396, Vol. 183, No. 1
0021-9193/01/$04.00+0   DOI: 10.1128/JB.183.1.393-396.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Role for hetC in the Transition to a Nondividing State during Heterocyst Differentiation in Anabaena sp.

Xudong Xudagger and C. Peter Wolk*

MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824-1312

Received 12 July 2000/Accepted 3 October 2000

Nitrogen-deprived filaments of wild-type or hetC Anabaena sp. produce respectively, at semiregular intervals, heterocysts and weakly fluorescent cells. Unlike heterocysts, the latter cells can divide and elongate, producing a pattern of spaced series of small cells. Because a hetR::gfp fusion is expressed most strongly in the small cells, we propose that these small cells represent a very early stage of heterocyst differentiation. hetC::gfp is expressed most strongly in proheterocysts and heterocysts.

* Corresponding author. Mailing address: MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, MI 48824-1312. Phone: (517) 353-2049. Fax: (517) 353-9168. E-mail: wolk{at}msu.edu.

dagger Present address: Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei, China.

Journal of Bacteriology, January 2001, p. 393-396, Vol. 183, No. 1
0021-9193/01/$04.00+0   DOI: 10.1128/JB.183.1.393-396.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.


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