Rhizobium etli is able to emit nitrous oxide by connecting assimilatory nitrate reduction with nitrite respiration in the bacteroids of common bean nodules
Por:
Hidalgo-Garcia, Alba, Tortosa, German, Pacheco, Pedro J., Gates, Andrew J., Richardson, David J., Bedmar, Eulogio J., Girard, Lourdes, Torres, Maria J., Delgado, Maria J.
Publicada:
1 ene 2023
Resumen:
Legumes can contribute to emissions of the potent greenhouse gas nitrous oxide (N2O) directly by some rhizobia species that are able to denitrify under free-living conditions and in symbiotic association with the plant. In this study, the capacity of Phaseolus vulgaris-Rhizobium etli symbiosis to emit N2O in response to nitrate (NO3-) has been demonstrated for the first time. We found that bacteroidal assimilatory nitrate reductase (NarB) as well as nitrite reductase (NirK) and nitric oxide reductase (cNor) denitrifying enzymes contribute to nitric oxide (NO) and N2O formation in nodules. We also show that R. etli NarK is involved in NO2- extrusion and links NO3- reduction by NarB in the cytoplasm with NirK and cNor denitrification activities in the periplasm. The knowledge generated in this work will be instrumental for exploring strategies and sustainable practices in agricultural soil management to increase legume crop yield and mitigate greenhouse gas emissions. © 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
Filiaciones:
Hidalgo-Garcia, Alba:
Department of Soil and Plant Microbiology, Estación Experimental del Zaidín, CSIC, Granada, Spain
CSIC, Dept Soil & Plant Microbiol, Estn Expt Zaidin, C Prof Albareda 1, E-18008 Granada, Spain
Tortosa, German:
Department of Soil and Plant Microbiology, Estación Experimental del Zaidín, CSIC, Granada, Spain
CSIC, Dept Soil & Plant Microbiol, Estn Expt Zaidin, C Prof Albareda 1, E-18008 Granada, Spain
Pacheco, Pedro J.:
Department of Soil and Plant Microbiology, Estación Experimental del Zaidín, CSIC, Granada, Spain
CSIC, Dept Soil & Plant Microbiol, Estn Expt Zaidin, C Prof Albareda 1, E-18008 Granada, Spain
Gates, Andrew J.:
School of Biological Sciences, University of East Anglia, Norwich, United Kingdom
Univ East Anglia, Sch Biol Sci, Norwich, England
Richardson, David J.:
School of Biological Sciences, University of East Anglia, Norwich, United Kingdom
Univ East Anglia, Sch Biol Sci, Norwich, England
Bedmar, Eulogio J.:
Department of Soil and Plant Microbiology, Estación Experimental del Zaidín, CSIC, Granada, Spain
CSIC, Dept Soil & Plant Microbiol, Estn Expt Zaidin, C Prof Albareda 1, E-18008 Granada, Spain
Girard, Lourdes:
Genomic Microbiology Program, Centro de Ciencias Genómicas, National Autonomous University of Mexico, Morelos, Mexico
Univ Nacl Autonoma Mexico, Ctr Ciencias Genom, Genom Microbiol Program, Cuernavaca, Morelos, Mexico
Torres, Maria J.:
Department of Biochemistry and Molecular Biology, Campus Universitario de Rabanales, University of Córdoba, Córdoba, Spain
Univ Cordoba, Dept Biochem & Mol Biol, Campus Univ Rabanales, Cordoba, Spain
Univ Cordoba, Dept Biochem & Mol Biol, Campus Univ Rabanales,Ed C6, Cordoba 14071, Spain
Delgado, Maria J.:
Department of Soil and Plant Microbiology, Estación Experimental del Zaidín, CSIC, Granada, Spain
CSIC, Dept Soil & Plant Microbiol, Estn Expt Zaidin, C Prof Albareda 1, E-18008 Granada, Spain
gold, Gold
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