Article
Biochemistry & Molecular Biology
Citlali Fonseca-Garcia, Claudia Marina Lopez-Garcia, Ronal Pacheco, Elisabeth Armada, Noreide Nava, Rocio Perez-Aguilar, Jorge Solis-Miranda, Carmen Quinto
Summary: This study analyzed the role of the PvMT1A gene in the Phaseolus vulgaris-Rhizobium tropici symbiosis. The results showed that PvMT1A plays an important role in the infection process and nodule development.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Biology
Beatrice Lace, Chao Su, Daniel Invernot Perez, Marta Rodriguez-Franco, Tatiana Vernie, Morgane Batzenschlager, Sabrina Egli, Cheng-Wu Liu, Thomas Ott
Summary: Host-controlled intracellular accommodation of nitrogen-fixing bacteria is essential for the establishment of a functional Root Nodule Symbiosis (RNS). Comparative phylogenomic studies have identified RPG as a critical genetic determinant for bacterial infection. This study provides evidence that RPG is part of a protein complex involved in membrane polarization, cytoskeleton-mediated connectivity, and polar secretion during bacterial infection.
Article
Plant Sciences
Rocio Reyero-Saavedra, Sara Isabel Fuentes, Alfonso Leija, Gladys Jimenez-Nopala, Pablo Pelaez, Mario Ramirez, Lourdes Girard, Timothy G. Porch, Georgina Hernandez
Summary: This study aims to isolate and characterize symbiotic mutants in common bean (Phaseolus vulgaris) in order to understand the symbiotic nitrogen fixation (SNF) process in this important food crop. Three non-nodulating mutants were identified and their impairments in different symbiotic steps were characterized. The responsible mutated gene is being mapped for further understanding of SNF in common bean.
Article
Plant Sciences
Meng Liu, Hiromu Kameoka, Akiko Oda, Taro Maeda, Takashi Goto, Koji Yano, Takashi Soyano, Masayoshi Kawaguchi
Summary: Legumes form root nodules in association with rhizobia to overcome nitrogen deficiency. ERN1 is a crucial transcription factor involved in the establishment of root nodule symbiosis, regulating processes such as cell wall remodeling and signal transduction. RNA sequencing revealed 234 genes associated with ERN1, involved in cell wall remodeling, signal transduction, hormone metabolism, and transcription regulation, expanding our understanding of the role of ERN1 in root nodule symbiosis.
FRONTIERS IN PLANT SCIENCE
(2023)
Review
Cell Biology
Anna V. Tsyganova, Nicholas J. Brewin, Viktor E. Tsyganov
Summary: This review discusses the formation and regulation of intracellular infection threads initiated in root hair cells, focusing on the rearrangement of the plant-microbial interface and the growth of infection threads. It also explores the composition of the main polymers of the infection thread wall and matrix, as well as the role of reactive oxygen species in infection thread development.
Article
Plant Sciences
Wei Fan, Chunjiao Xia, Shixiang Wang, Jing Liu, Lijun Deng, Shiyong Sun, Xuelu Wang
Summary: The symbiotic relationship between legumes and rhizobia leads to the formation of nitrogen-fixing root nodules. This study reveals that infected cells and uninfected cells in the developing nodules both have 4C nuclei, and the 4C cells primarily invaded by rhizobia undergo endoreduplication. Moreover, the function of the 4C cells in the nodules changes at different time points after infection.
Article
Biochemistry & Molecular Biology
Mingxing Wang, Huan Feng, Peng Xu, Qiujin Xie, Jinpeng Gao, Yanzhang Wang, Xiaowei Zhang, Jun Yang, Jeremy D. Murray, Fengli Sun, Chunyan Wang, Ertao Wang, Nan Yu
Summary: The study identified the crucial roles of small GTPases and Nod factor receptor in root hair development and infection process in Medicago truncatula, regulating polar growth and deformation of root hairs through activation and interaction mechanisms.
JOURNAL OF INTEGRATIVE PLANT BIOLOGY
(2021)
Article
Plant Sciences
Haibo Huo, Le Zong, Yao Liu, Wenfeng Chen, Juan Chen, Gehong Wei
Summary: In this study, the researchers found that hmuS(pSym) of M. amorphae CCNWGS0123 plays a crucial role in rhizobial infection, nitrogen fixation, and nodule development in symbiosis with Robinia pseudoacacia. The protein HmuS(pSym) is involved in heme-binding and is strongly expressed in the nitrogen-fixation zone of mature nodules. The inactivation of hmuS(pSym) leads to the impairment of bacteroid survival and defense reaction in root nodules.
PLANT CELL AND ENVIRONMENT
(2022)
Article
Plant Sciences
Paula Ayala-Garcia, Irene Jimenez-Guerrero, Catherine Jacott, Francisco Javier Lopez-Baena, Francisco Javier Ollero, Pablo Del Cerro, Francisco Perez-Montano
Summary: Overexpression of nodD2 in Rhizobium tropici CIAT 899 promotes Nod factor production, restores nodulation ability, and extends nodulation range. NodD regulators play a crucial role in orchestrating the transcription of nodulation genes in the symbiotic associations between rhizobia and legumes. Interestingly, nodD2 overexpression can also enhance nodulation in Sinorhizobium fredii HH103 and lead to nodule development in incompatible legumes.
JOURNAL OF EXPERIMENTAL BOTANY
(2022)
Review
Biology
Grace E. Wardell, Michael F. Hynes, Peter J. Young, Ellie Harrison
Summary: Rhizobia are a significant group of bacterial symbionts that establish nitrogen-fixing intracellular infections within plant hosts. The genes involved in this symbiosis are encoded on mobile genetic elements (MGEs), suggesting the importance of horizontal gene transfer in the ecology and evolution of rhizobium-legume symbiosis.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2022)
Article
Biochemistry & Molecular Biology
Maria Izabel A. Cavassim, Stig U. Andersen, Thomas Bataillon, Mikkel Heide Schierup
Summary: This study investigates how homologous recombination affects the rate of adaptive evolution in bacterial genomes, revealing a positive correlation between recombination rate and the fixed proportion of adaptive mutations. The higher recombination rate leads to an increased probability of fixation of advantageous variants and a decreased probability of fixation of deleterious variants, ultimately facilitating adaptive evolution in prokaryotic species.
MOLECULAR BIOLOGY AND EVOLUTION
(2021)
Review
Biochemistry & Molecular Biology
Dapeng Wang, Wentao Dong, Jeremy Murray, Ertao Wang
Summary: The review focuses on the progress in understanding the evolution and differences between mycorrhizal and root nodule symbioses in plants. It highlights the importance of plants being able to distinguish between beneficial symbionts and potential pathogens for their survival. The overlap in signaling pathways and infection components of these symbioses reflects their evolutionary relatedness, while the different outputs, phosphate uptake versus N fixation, require fundamentally different components and regulators.
Review
Plant Sciences
Margarita Granada Agudelo, Bryan Ruiz, Delphine Capela, Philippe Remigi
Summary: This review article describes the diversity of interactions between rhizobia and other microorganisms that can occur in the rhizosphere, during the initiation of nodulation, and within nodules. These interactions have significant impacts on the fitness and evolutionary trajectories of rhizobia.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Microbiology
Alexandra J. Weisberg, Arafat Rahman, Dakota Backus, Parinita Tyavanagimatt, Jeff H. Chang, Joel L. Sachs
Summary: Genetic variation in symbiotic nitrogen fixation is maintained through a modular system that allows for flexibility and reshuffling of genes. This results in variation in the services provided by symbionts and can lead to the evolution of uncooperative genotypes. However, the overall symbiosis between legume hosts and Bradyrhizobium bacteria is evolutionarily stable.
Review
Plant Sciences
K. Karl Compton, Birgit E. Scharf
Summary: This study focuses on the host-microbe interactions between legumes and their cognate rhizobia, specifically examining the chemotaxis mechanisms of rhizobia, including the motility apparatus that propels bacterial movement and the chemotaxis system that guides their competitive advantage.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Plant Sciences
Stephane Boivin, Nassima Ait Lahmidi, David Sherlock, Maxime Bonhomme, Doriane Dijon, Karine Heulin-Gotty, Antoine Le-Quere, Marjorie Pervent, Marc Tauzin, Georg Carlsson, Erik Jensen, Etienne-Pascal Journet, Raphael Lopez-Bellido, Marek Seidenglanz, Jelena Marinkovic, Stefano Colella, Brigitte Brunel, Peter Young, Marc Lepetit
Article
Biochemistry & Molecular Biology
Aleksandr Gavrin, Thomas Rey, Thomas A. Torode, Justine Toulotte, Abhishek Chatterjee, Jonathan Louis Kaplan, Edouard Evangelisti, Hiroki Takagi, Varodom Charoensawan, David Rengel, Etienne-Pascal Journet, Frederic Debelle, Fernanda de Carvalho-Niebel, Ryohei Terauchi, Siobhan Braybrook, Sebastian Schornack
Article
Plant Sciences
Arina Shrestha, Sihui Zhong, Jasmine Therrien, Terry Huebert, Shusei Sato, Terry Mun, Stig U. Andersen, Jens Stougaard, Agnes Lepage, Andreas Niebel, Loretta Ross, Krzysztof Szczyglowski
Summary: Legume root nodule organogenesis is initiated by the stimulation of root cells and involves the regulation of specific gene families to promote cellular differentiation and auxin signaling. The emergence of nodules is dependent on a regulatory cascade involving NF-YA1, STY genes, and downstream targets YUCCA1 and YUCCA11. These genes are important regulators of auxin signaling during the specific stage of nodule emergence in Lotus japonicus and Medicago truncatula.
Review
Agronomy
Gaetan Louarn, Laurent Bedoussac, Noemie Gaudio, Etienne-Pascal Journet, Delphine Moreau, Erik Steen Jensen, Eric Justes
Summary: Management of nitrogen supply in agroecosystems is crucial for food production and environmental preservation. Intercropping reduces the use of nitrogen fertilizers, but optimizing nitrogen usage in mixed crops remains challenging. Indices based on the nitrogen dilution theory show promise for balanced binary intercrops, but further research is needed for complex mixtures and shaded crops.
EUROPEAN JOURNAL OF AGRONOMY
(2021)
Article
Biodiversity Conservation
Noemie Gaudio, Cyrille Violle, Xavier Gendre, Florian Fort, Remi Mahmoud, Elise Pelzer, Safia Mediene, Henrik Hauggaard-Nielsen, Laurent Bedoussac, Catherine Bonnet, Guenaelle Corre-Hellou, Antoine Couedel, Philippe Hinsinger, Erik Steen Jensen, Etienne-Pascal Journet, Eric Justes, Bochra Kammoun, Isabelle Litrico, Nathalie Moutier, Christophe Naudin, Pierre Casadebaig
Summary: This study analyzed 28 cereal-legume intercropping trials from Western Europe and found that plant reproductive allometry positively impacts yield in specific management conditions, particularly benefiting legumes in unfertilized mixtures. Hierarchical competition appears to be a strong driver of reproductive output of a given species in intercropping systems.
JOURNAL OF APPLIED ECOLOGY
(2021)
Article
Plant Sciences
Sebastien Carrere, Jerome Verdier, Pascal Gamas
Summary: MtExpress is a gene expression atlas that compiles a comprehensive set of published M. truncatula RNAseq data, offering a global view of gene expression in various conditions and tissues.
PLANT AND CELL PHYSIOLOGY
(2021)
Editorial Material
Plant Sciences
Helge Kuester
PLANT AND CELL PHYSIOLOGY
(2021)
Article
Agriculture, Multidisciplinary
David Camilo Corrales, Celine Schoving, Helene Raynal, Philippe Debaeke, Etienne-Pascal Journet, Julie Constantin
Summary: In this study, a surrogate model was developed to improve soybean yield prediction by using feature selection techniques and regression learners. By using the STICS simulator and different models, the researchers found that the combination of feature selection techniques with SVR and LR models provided the best results.
COMPUTERS AND ELECTRONICS IN AGRICULTURE
(2022)
Article
Plant Sciences
Lucie Schroeder, Natalija Hohnjec, Michael Senkler, Jennifer Senkler, Helge Kuester, Hans-Peter Braun
Summary: European mistletoe is a hemiparasitic plant with unique biochemical properties and an unusual cellular respiration process. Despite the large genome size of V. album, sequencing of its gene space has provided insights into its metabolism and molecular biology. The information from V. album gene space has led to the re-evaluation of mitochondrial proteome data and the identification of additional mitochondrial proteins.
Article
Multidisciplinary Sciences
Suyu Jiang, Marie-Francoise Jardinaud, Jinpeng Gao, Yann Pecrix, Jiangqi Wen, Kirankumar Mysore, Ping Xu, Carmen Sanchez-Canizares, Yiting Ruan, Qiujiu Li, Meijun Zhu, Fuyu Li, Ertao Wang, Phillip S. Poole, Pascal Gamas, Jeremy D. Murray
Summary: Leghemoglobins play a crucial role in facilitating nitrogen fixation in legume nodules by maintaining a micro-oxic environment while channeling oxygen for bacterial respiration. The NLP transcription factors NLP2 and NIN are found to directly activate leghemoglobin expression through a specific promoter motif, and knockout of the NRE-like element significantly decreases leghemoglobin expression. These findings suggest that the NLP-leghemoglobin module for oxygen buffering in nodules has ancient origins dating back to the pairing of NLPs with nonsymbiotic hemoglobins in hypoxic conditions.
Article
Plant Sciences
Bochra Kammoun, Etienne-Pascal Journet, Eric Justes, Laurent Bedoussac
Summary: Research suggests that diversifying cropping systems using cereal-legume mixtures is crucial for ensuring food security for the growing global population and mitigating environmental impacts and climate change. Simple variables can be used to estimate grain yield of wheat-legume intercrops under low nitrogen input conditions. Further mechanistic understanding of cultivar responses to interspecific competition is needed for optimal intercropping design and management.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Plant Sciences
Lucie Schroeder, Oliver Rupp, Michael Senkler, Nils Rugen, Natalija Hohnjec, Alexander Goesmann, Helge Kuester, Hans-Peter Braun
Summary: European mistletoe is a hemiparasitic flowering plant with an extremely large genome size. A transcriptome project was conducted to study its gene space, resulting in a database containing sequences of thousands of open reading frames encoding distinct proteins. A new database, VaGs II, was developed by combining data from a summer and winter transcriptome project, and it showed a higher completeness compared to the previous database. The quality of the new database was evaluated by re-analyzing proteome data, which provided new insights into the oxidative phosphorylation system of European mistletoe.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Plant Sciences
Marie-Francoise Jardinaud, Justine Fromentin, Marie-Christine Auriac, Sandra Moreau, Yann Pecrix, Ludivine Taconnat, Ludovic Cottret, Gregoire Aubert, Sandrine Balzergue, Judith Burstin, Sebastien Carrere, Pascal Gamas
Summary: The study reveals that nitrogen-fixing symbiosis recruited two homologous root transcription factors for nodule development, providing a key insight into the coordination of plant and bacterial cell differentiation during this process.
Review
Agronomy
Eric Justes, Laurent Bedoussac, Christos Dordas, Ela Frak, Gaetan Louarn, Simon Boudsocq, Etienne-Pascal Journet, Anastasios Lithourgidis, Chrysanthi Pankou, Chaochun Zhang, Georg Carlsson, Erik Steen Jensen, Christine Watson, Long Li
Summary: Modern agriculture needs to develop transition pathways towards agroecological, resilient, and sustainable farming systems, with diversification of cropping systems such as intercropping playing a key role. The 4C approach helps assess the performance of arable intercropping versus classical sole cropping by understanding the use of abiotic resources.
FRONTIERS OF AGRICULTURAL SCIENCE AND ENGINEERING
(2021)
Article
Agronomy
Gatien N. Falconnier, Anthony Vermue, Etienne-Pascal Journet, Mathias Christina, Laurent Bedoussac, Eric Justes
FIELD CROPS RESEARCH
(2020)