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Article Dans Une Revue Frontiers in Plant Science Année : 2023

Global diversity and distribution of nitrogen-fixing bacteria in the soil

Siim-Kaarel Sepp
  • Fonction : Auteur
Martti Vasar
  • Fonction : Auteur
John Davison
  • Fonction : Auteur
Jane Oja
  • Fonction : Auteur
Saleh Al-Quraishy
  • Fonction : Auteur
C. Guillermo Bueno
  • Fonction : Auteur
Ezequiel Chimbioputo Fabiano
  • Fonction : Auteur
Roberto Garibay Oriel
  • Fonction : Auteur
Kadri Koorem
  • Fonction : Auteur
Maarja Öpik
  • Fonction : Auteur
Sergei Põlme
  • Fonction : Auteur
Meelis Pärtel
  • Fonction : Auteur
Cherdchai Phosri
  • Fonction : Auteur
Marina Semchenko
  • Fonction : Auteur
Tanel Vahter
  • Fonction : Auteur
Aida Vasco Palacios
  • Fonction : Auteur
Leho Tedersoo
  • Fonction : Auteur
Martin Zobel
  • Fonction : Auteur

Résumé

Our knowledge of microbial biogeography has advanced in recent years, yet we lack knowledge of the global diversity of some important functional groups. Here, we used environmental DNA from 327 globally collected soil samples to investigate the biodiversity patterns of nitrogen-fixing bacteria by focusing on the nif H gene but also amplifying the general prokaryotic 16S SSU region. Globally, N-fixing prokaryotic communities are driven mainly by climatic conditions, with most groups being positively correlated with stable hot or seasonally humid climates. Among soil parameters, pH, but also soil N content were most often shown to correlate with the diversity of N-fixer groups. However, specific groups of N-fixing prokaryotes show contrasting responses to the same variables, notably in Cyanobacteria that were negatively correlated with stable hot climates, and showed a U-shaped correlation with soil pH, contrary to other N-fixers. Also, the non-N-fixing prokaryotic community composition was differentially correlated with the diversity and abundance of N-fixer groups, showing the often-neglected impact of biotic interactions among bacteria.

Dates et versions

hal-03980935 , version 1 (09-02-2023)

Identifiants

Citer

Siim-Kaarel Sepp, Martti Vasar, John Davison, Jane Oja, Sten Anslan, et al.. Global diversity and distribution of nitrogen-fixing bacteria in the soil. Frontiers in Plant Science, 2023, 14, ⟨10.3389/fpls.2023.1100235⟩. ⟨hal-03980935⟩
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