Type III secretion system of bradyrhizobium sp. Sutn9-2 obstructs symbiosis with lotus spp.

Shun Hashimoto, Kohki Goto, Pongdet Pyromyou, Pongpan Songwattana, Teerana Greetatorn, Panlada Tittabutr, Nantakorn Boonkerd, Neung Teaumroong, Toshiki Uchiumi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The rhizobial type III secretion system secretes effector proteins into host plant cells, which may either promote or inhibit symbiosis with legumes. We herein demonstrated that the type III secretion system of Bradyrhizobium sp. SUTN9-2 obstructed symbiosis with Lotus japonicus Miyakojima, L. japonicus Gifu, and Lotus burttii. A mutant of SUTN9-2 that is unable to secrete effector proteins showed better nodulation and plant growth promotion than wild-type SUTN9-2 when paired with these Lotus spp. We propose that SUTN9-2 is a useful strain for understanding the mechanisms by which effector proteins obstruct symbiosis between Bradyrhizobium and Lotus spp.

Original languageEnglish
Article numberME20041
Pages (from-to)1-5
Number of pages5
JournalMicrobes and Environments
Volume35
Issue number3
DOIs
Publication statusPublished - 2020

Keywords

  • Bradyrhizobium
  • Effector protein
  • Lotus spp
  • Symbiosis
  • Type III secretion system

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