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Journal of Bacteriology, November 2007, p. 8347-8352, Vol. 189, No. 22
0021-9193/07/$08.00+0     doi:10.1128/JB.00788-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

The Mesorhizobium loti purB Gene Is Involved in Infection Thread Formation and Nodule Development in Lotus japonicus{triangledown}

Shin Okazaki,1,2,{dagger} Yoshiyuki Hattori,2 and Kazuhiko Saeki1,2*

Department of Biological Sciences, Faculty of Science, Nara Women's University, Nara 630-8506,1 Department of Biological Sciences, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan2

Received 21 May 2007/ Accepted 29 August 2007

The purB and purH mutants of Mesorhizobium loti exhibited purine auxotrophy and nodulation deficiency on Lotus japonicus. In the presence of adenine, only the purH mutant induced nodule formation and the purB mutant produced few infection threads, suggesting that 5-aminoimidazole-4-carboxamide ribonucleotide biosynthesis catalyzed by PurB is required for the establishment of symbiosis.

* Corresponding author. Mailing address: Department of Biological Sciences, Faculty of Science, Nara Women's University, Nara 630- 8506, Japan. Phone and fax: 81-742-20-3028. E-mail: ksaeki{at}cc.nara-wu.ac.jp

{triangledown} Published ahead of print on 7 September 2007.

{dagger} Present address: Dresden University of Technology, Institute of Genetics, Zellescher Weg 20B, 01069 Dresden, Germany.

Journal of Bacteriology, November 2007, p. 8347-8352, Vol. 189, No. 22
0021-9193/07/$08.00+0     doi:10.1128/JB.00788-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.



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