Abstract

Rhizobia are bacteria that form nitrogen-fixing nodules in legume plants. The sets of genes responsible for both nodulation and nitrogen fixation are carried in plasmids or genomic islands that are often mobile. Different strains within a species sometimes have different host specificities, while very similar symbiosis genes may be found in strains of different species. These specificity variants are known as symbiovars, and many of them have been given names, but there are no established guidelines for defining or naming them. Here, we discuss the requirements for guidelines to describe symbiovars, propose a set of guidelines, provide a list of all symbiovars for which descriptions have been published so far, and offer a mechanism to maintain a list in the future.

Received: 23/02/2024 Accepted: 25/04/2024 Published Online: 14/05/2024

Funding

This study was supported by the: CNPq (Award 465133/2014-4) Principle Award Recipient: MariangelaHungria IRNASA/CSIC (Award CLU-2019-05) Principle Award Recipient: AlvaroPeix Universidad Nacional Autónoma de México (Award PAPIIT) Principle Award Recipient: EsperanzaMartinez-Romero

© 2024 The Authors

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/content/journal/ijsem/10.1099/ijsem.0.006373

2024-05-14

2024-05-16

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