Genomic and transcriptomic insights into legume-rhizobia symbiosis in the nitrogen-fixing tree Robinia pseudoacacia

© 2025 The Author(s). New Phytologist © 2025 New Phytologist Foundation.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 246(2025), 6 vom: 21. Juni, Seite 2522-2536
1. Verfasser: Hu, Bin (VerfasserIn)
Weitere Verfasser: Messerer, Maxim, Haberer, Georg, Lux, Thomas, Marosi, Vanda, Mayer, Klaus F X, Oliphant, Kevin D, Kaufholdt, David, Schulze, Jutta, Kreth, Lana-Sophie, Jurgeleit, Jens, Geffers, Robert, Hänsch, Robert, Rennenberg, Heinz
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2025
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Robinia pseudoacacia L. biological N2 fixation genome legume rhizobia inoculation transcriptional analysis
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520 |a Robinia pseudoacacia L. (black locust) is a nitrogen (N)-fixing legume tree with significant ecological and agricultural importance. Unlike well-studied herbaceous legumes, R. pseudoacacia is a perennial woody species, representing an understudied group of legume trees that establish symbiosis with Mesorhizobium. Understanding its genomic and transcriptional responses to nodulation provides key insights into N fixation in long-lived plants and their role in ecosystem N cycling. We assembled a high-quality 699.6-Mb reference genome and performed transcriptomic analyses comparing inoculated and noninoculated plants. Differential expression and co-expression network analyses revealed organ-specific regulatory pathways, identifying key genes associated with symbiosis, nutrient transport, and stress adaptation. Unlike Medicago truncatula, which predominantly responds to nodulation in roots, R. pseudoacacia exhibited stem-centered transcriptional reprogramming, with the majority of differentially expressed genes located in stems rather than in roots. Co-expression network analysis identified gene modules associated with "leghemoglobins", metal detoxification, and systemic nutrient allocation, highlighting a coordinated long-distance response to N fixation. This study establishes R. pseudoacacia as a genomic model for nodulating trees, providing essential resources for evolutionary, ecological, and applied research. These findings have significant implications for reforestation, phytoremediation, forestry, and sustainable N management, particularly in depleted, degraded, and contaminated soil ecosystems 
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650 4 |a Robinia pseudoacacia L. 
650 4 |a biological N2 fixation 
650 4 |a genome 
650 4 |a legume 
650 4 |a rhizobia inoculation 
650 4 |a transcriptional analysis 
700 1 |a Messerer, Maxim  |e verfasserin  |4 aut 
700 1 |a Haberer, Georg  |e verfasserin  |4 aut 
700 1 |a Lux, Thomas  |e verfasserin  |4 aut 
700 1 |a Marosi, Vanda  |e verfasserin  |4 aut 
700 1 |a Mayer, Klaus F X  |e verfasserin  |4 aut 
700 1 |a Oliphant, Kevin D  |e verfasserin  |4 aut 
700 1 |a Kaufholdt, David  |e verfasserin  |4 aut 
700 1 |a Schulze, Jutta  |e verfasserin  |4 aut 
700 1 |a Kreth, Lana-Sophie  |e verfasserin  |4 aut 
700 1 |a Jurgeleit, Jens  |e verfasserin  |4 aut 
700 1 |a Geffers, Robert  |e verfasserin  |4 aut 
700 1 |a Hänsch, Robert  |e verfasserin  |4 aut 
700 1 |a Rennenberg, Heinz  |e verfasserin  |4 aut 
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