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Journal of Bacteriology, June 2007, p. 4547-4551, Vol. 189, No. 12
0021-9193/07/$08.00+0     doi:10.1128/JB.01927-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

Molecular Analysis of Genes in Nostoc punctiforme Involved in Pilus Biogenesis and Plant Infection

Paula S. Duggan, Priscila Gottardello, and David G. Adams^*

Institute of Integrative and Comparative Biology, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, United Kingdom

Received 21 December 2006/ Accepted 30 March 2007

Hormogonia are the infective agents in many cyanobacterium-plant symbioses. Pilus-like appendages are expressed on the hormogonium surface, and mutations in pil-like genes altered surface piliation and reduced symbiotic competency. This is the first molecular evidence that pilus biogenesis in a filamentous cyanobacterium requires a type IV pilus system.

Published ahead of print on 6 April 2007.

Present address: The Institute of Pharmaceutical Innovation, University of Bradford, Bradford, BD7 1DP, United Kingdom.

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