is a clinically relevant genus of bacteria, with this paper reporting draft genomes of five strains derived from root nodules. The genome sizes of the isolates ranged from 6.1 to 6.9 Mbp, composed of 22-59 contigs. The values ranged from 303,875 to 865,751 bp, presenting a GC% of 66.07%-66.96%.
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http://dx.doi.org/10.1128/mra.01132-23 | DOI Listing |
Appl Environ Microbiol
January 2025
Legume Rhizobium Sciences, Food Futures Institute, Murdoch University, Murdoch, Western Australia, Australia.
Unlabelled: Rhizobia are soil bacteria capable of establishing symbiosis within legume root nodules, where they reduce atmospheric N into ammonia and supply it to the plant for growth. Australian soils often lack rhizobia compatible with introduced agricultural legumes, so inoculation with exotic strains has become a common practice for over 50 years. While extensive research has assessed the N-fixing capabilities of these inoculants, their genomics, taxonomy, and core and accessory gene phylogeny are poorly characterized.
View Article and Find Full Text PDFTrends Plant Sci
January 2025
Genetics, Faculty of Biology, Ludwig Maximilian University of Munich, 82152 Planegg-Martinsried, Munich, Germany; Department of Plant Molecular Biology, University of Lausanne, 1015 Lausanne, Switzerland. Electronic address:
While rhizobia have long been recognised as the primary colonisers of legume nodules, microbiome studies have revealed the presence of other bacteria in these organs. This opinion delves into the factors shaping the nodule microbiome and explores the potential roles of non-rhizobial endophytes, focusing particularly on Pseudomonas as prominent players. We explore the mechanisms by which Pseudomonas colonise nodules, their interactions with rhizobia, and their remarkable potential to promote plant growth and protect against pathogens.
View Article and Find Full Text PDFPlants (Basel)
December 2024
College of Agriculture, Northeast Agricultural University, Harbin 150030, China.
In this study, dual-root soybean ( L. Merr.) plants, with one side nodulated and the other nonnodulated, were used as experimental materials.
View Article and Find Full Text PDFInt J Mol Sci
December 2024
Guangdong Provincial Key Laboratory of Plant Adaptation and Molecular Design, Innovative Center of Molecular Genetics and Evolution, School of Life Sciences, Guangzhou University, Guangzhou 510006, China.
Legumes have the capability to form nodules that facilitate symbiotic nitrogen fixation (SNF) with rhizobia. Given the substantial energy consumption during the process of SNF, legumes need to optimize nodule number in response to everchanging environmental scenarios. The TGACG BINDING FACTOR1/4 (TGA1/4) are key players in the basal immune response of plants.
View Article and Find Full Text PDFNat Commun
January 2025
The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education; Shandong Key Laboratory of Precision Molecular Crop Design and Breeding; School of Life Sciences, Shandong University, Qingdao, Shandong, China.
While the genetic regulation of nodule formation has been well explored, the molecular mechanisms by which abiotic stresses, such as salt stress, impede nodule formation remain largely elusive. Here, we identify four APETALA2/Ethylene Responsive Factor (AP2/ERF) transcription factors, GmERF13s, that are induced by salt stress and play key roles in salt-repressed nodulation. Loss of GmERF13 function increases nodule density, while its overexpression suppresses nodulation.
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