Abstract

Sinorhizobium phage ΦM6 infects the nitrogen-fixing rhizobial bacterium Sinorhizobium meliloti. ΦM6 most closely resembles marine phages, such as Puniceispirillum phage HMO-2011, rather than previously sequenced rhizobial phages. The 68,176-bp genome is predicted to encode 121 open reading frames, only 10 of which have similarity to those of otherwise-unrelated Sinorhizobium phages.

Highlights

  • Sinorhizobium phage ⌽M6 infects the nitrogen-fixing rhizobial bacterium Sinorhizobium meliloti. ⌽M6 most closely resembles marine phages, such as Puniceispirillum phage HMO-2011, rather than previously sequenced rhizobial phages

  • Our lack of knowledge of rhizobial phages limits our understanding of the effects of phage predation on rhizobial survival both in soil and in crop bioinoculants [2,3,4]. ⌽M6 is a bacteriophage from a historical collection [2] and infects Sinorhizobium meliloti SU47, a nitrogen-fixing symbiont of Medicago truncatula, and Medicago sativa [5, 6]

  • Infection of S. meliloti by ⌽M6 is dependent on both lipopolysaccharide [7] and the outer membrane protein RopA1 [8]

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Summary

Introduction

Sinorhizobium phage ⌽M6 infects the nitrogen-fixing rhizobial bacterium Sinorhizobium meliloti. ⌽M6 most closely resembles marine phages, such as Puniceispirillum phage HMO-2011, rather than previously sequenced rhizobial phages. Sinorhizobium phage ⌽M6 infects the nitrogen-fixing rhizobial bacterium Sinorhizobium meliloti. ⌽M6 most closely resembles marine phages, such as Puniceispirillum phage HMO-2011, rather than previously sequenced rhizobial phages. The 68,176-bp genome is predicted to encode 121 open reading frames, only 10 of which have similarity to those of otherwise-unrelated Sinorhizobium phages.

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