A5014084653- Legume Nitrogen Fixing Symbiosis
- Agronomic Practices and Intercropping Systems
- Plant nutrient uptake and metabolism
- Plant Stress Responses and Tolerance
- Plant Molecular Biology Research
- Cassava research and cyanide
- Nematode management and characterization studies
- Plant Water Relations and Carbon Dynamics
- Plant responses to elevated CO2
- Plant-Microbe Interactions and Immunity
- Postharvest Quality and Shelf Life Management
- Plant Gene Expression Analysis
- Coastal wetland ecosystem dynamics
- Polymer-Based Agricultural Enhancements
- Genetic Mapping and Diversity in Plants and Animals
- Plant biochemistry and biosynthesis
- Plant Surface Properties and Treatments
- Potato Plant Research
Laboratoire des Symbioses Tropicales et Méditerranéennes
2017-2024
Centre de Coopération Internationale en Recherche Agronomique pour le Développement
2020-2024
Institut de Recherche pour le Développement
2020-2024
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2020-2024
Plant Health Institute de Montpellier
2022-2024
Université de Montpellier
2023-2024
Centre Occitanie-Montpellier
2022-2024
Institut Agro Montpellier
2023-2024
Institut de Biologie Intégrative de la Cellule
2023
Centre National de la Recherche Scientifique
2015-2023
Abstract Land plant aerial organs are covered by a hydrophobic layer called the cuticle that serves as waterproof barrier protecting plants against desiccation, ultraviolet radiation, and pathogens. Cuticle consists of cutin matrix well cuticular waxes in which very-long-chain (VLC) alkanes major components, representing up to 70% total wax content Arabidopsis (Arabidopsis thaliana) leaves. However, despite its involvement formation, alkane-forming pathway is still largely unknown. To...
Abstract Growth and carbon (C) fluxes are severely altered in plants exposed to soil water deficit. Correspondingly, it has been suggested that under deficit suffer from C shortage. In this study, we test hypothesis Arabidopsis (Arabidopsis thaliana) by providing an overview of the responses growth, balance, metabolites, enzymes central metabolism, a set sugar-responsive genes sustained The results show drought, rosette relative expansion rate is decreased more than photosynthesis, leading...
The phosphatase ABI2 enables plants to efficiently uptake and respond changes in nitrogen availability.
High temperature (HT) and water deficit (WD) are frequent environmental constraints restricting plant growth productivity. These stresses often occur simultaneously in the field, but little is known about their combined impacts on growth, development physiology. We evaluated responses of 10 Arabidopsis thaliana natural accessions to prolonged elevated air (30 °C) soil WD applied separately or combination. Plant was significantly reduced under both combination even more detrimental...
Abstract Among legumes (Fabaceae) capable of nitrogen-fixing nodulation, several Aeschynomene spp. use a unique symbiotic process that is independent Nod factors and infection threads. They are also distinctive in developing root stem nodules with photosynthetic bradyrhizobia. Despite the significance these features, their understanding remains limited. To overcome such limitations, we conduct genetic studies nodulation evenia , supported by development genome sequence for A. transcriptomic...
Legume plants can acquire mineral nitrogen (N) either through their roots or via a symbiotic interaction with N-fixing rhizobia bacteria housed in root nodules. To identify shoot-to-root systemic signals acting Medicago truncatula at N deficit satiety, were grown split-root experimental design which high low was provided to half of the system, allowing analysis pathways independently any local response. Among plant hormone families analyzed, cytokinin trans-zeatin accumulated satiety....
Variation in leaf development caused by water deficit was analysed 120 recombinant inbred lines derived from two Arabidopsis thaliana accessions, Ler and An-1. Main effect quantitative trait loci (QTLs) QTLs epistatic interactions were mapped for the responses of rosette area, number 6 area to deficit. An interaction between affected response whole individual but only with effects well-watered condition. A second controlled specific These validated generating phenotyping new appropriate...
The establishment of the rhizobium-legume symbiosis is generally based on plant perception Nod factors (NFs) synthesized by bacteria. However, some Bradyrhizobium strains can nodulate certain legume species, such as Aeschynomene spp. or Glycine max, independently NFs, and via two different processes that are distinguished necessity not a type III secretion system (T3SS). ErnA first known effector (T3E) triggering nodulation in indica. In this study, collection 196 sequenced was tested A....
Abstract Intensive research on nitrogen-fixing symbiosis in two model legumes has uncovered the molecular mechanisms, whereby rhizobial Nod factors activate a plant symbiotic signaling pathway that controls infection and nodule organogenesis. In contrast, so-called Nod-independent found between Aeschynomene evenia photosynthetic bradyrhizobia, which does not involve factor recognition nor thread formation, is less well known. To gain knowledge how established, we conducted phenotypic...
Legumes have the ability to establish a nitrogen-fixing symbiosis with soil rhizobia that they house in specific organs, nodules. In most rhizobium-legume interactions, nodulation occurs on root. However, certain tropical legumes growing wetlands possess unique trait: capacity form rhizobia-harbouring nodules stem. Despite originality of stem process, its occurrence and diversity waterlogging-tolerant remains underexplored, impeding comprehensive analysis genetics biology. Here, we aimed at...
Some Bradyrhizobium strains nodulate certain Aeschynomene species independently of Nod factors, but thanks to their type III secretion system (T3SS). While different T3 effectors triggering nodulation (ErnA and Sup3) have been identified, the plant signalling pathways they activate remain unknown. Here, we explored intraspecies variability in T3SS-triggered within evenia investigated transcriptomic responses that occur during this symbiosis. Furthermore, having effector sets were tested on...
Abstract Legumes establish symbiotic interactions with nitrogen-fixing rhizobia that are accommodated in root-derived organs known as nodules. Rhizobial recognition triggers a plant signaling pathway activates 2 coordinated processes: infection and nodule organogenesis. How these processes orchestrated legume species utilizing intercellular lateral root base nodulation remains elusive. Here, we show Aeschynomene evenia OROSOMUCOID PROTEIN 1 (AeORM1), key regulator of sphingolipid...
Legumes in the tribe Fabeae form nitrogen-fixing root nodules resulting from symbiotic interaction with soil bacteria Rhizobium leguminosarum symbiovar viciae (Rlv). These are all potential symbionts of hosts but display variable competitiveness to (CFN) when co-inoculated mixture. Because CFN and nitrogen-fixation capacity behave generally as genetically independent traits, efficiency symbiosis is often suboptimal legumes exposed natural bacterial populations present soil. A core collection...
Abstract Many plants interact symbiotically with arbuscular mycorrhizal (AM) fungi to enhance inorganic phosphorus uptake, and legumes also develop a nodule symbiosis rhizobia for nitrogen acquisition. Establishment functioning of both symbioses rely on common plant signaling pathway activated by structurally related Myc- Nod-factors. Recently, SPARK Receptor-like-Kinase (RLK)/Receptor-like Cytoplasmic Kinase (RLCK) complex was shown be essential AM in monocot dicot plants. Here, we show...
In mature symbiotic root nodules, differentiated rhizobia fix atmospheric dinitrogen and provide ammonium to fulfill the plant nitrogen (N) demand. The enables this process by providing photosynthates nodules. symbiosis is adjusted whole N demand thanks systemic signaling controlling nodule development. Symbiotic plants under deficit stimulate expansion activate senescence satiety. Besides, nodules are highly sensitive drought. Here, we used split-root systems characterize responses of a...
Abstract Among legumes (Fabaceae) capable of nitrogen-fixing nodulation, several Aeschynomene spp. use a unique symbiotic process that is independent Nod factors and infection threads. They are also distinctive in developing root stem nodules with photosynthetic bradyrhizobia. Despite the significance these features, their understanding remains limited. To overcome such limitations, we conducted genetic studies nodulation evenia , supported by development genome sequence for A....
Abstract As an adaptation to flooding, few legume species have the original ability develop nitrogen-fixing nodules on stem. By surveying wetlands of Madagascar, we found a large occurrence and diversity stem nodulation in Aeschynomene Sesbania legumes. They represent opportunities investigate different modalities symbiosis
Abstract Legumes are able to establish symbiotic interactions with nitrogen-fixing rhizobia that accomodated in root-derived organs, the nodules. Rhizobia recognition triggers a plant signalling pathway activating two coordinated processes: infection and nodule organogenesis. How these orchestrated legumes species utilizing intercellular lateral root-base nodulation remain elusive. Here, we show Aeschynomene evenia OROSOMUCOID PROTEIN 1 (AeORM1), key regulator of sphingolipid biosynthesis,...