Search results for "Bios"

The arbuscular mycorrhizal symbiosis a modulator of cadmium stress

2008

International audience; Ecosystems are submitted to various abiotic stresses, among which heavy metals represent major industrial pollutants. Cadmium (Cd), that has damaging effects on plant metabolism, occurs in agricultural environments through industrial pollution and human activities, including phosphate fertiliser and sewage sludge applications. Metal availability to plants can be modulated by soil microorganisms, such as arbuscular mycorrhizal (AM) fungi. In the present work, Cd effects on the model legume Medicago truncatula inoculated or not with the AM fungus Glomus intraradices have been studied at 3 levels: (1) plant biomass production together with green part chlorophyll quantif…

Could subcellular proteomics of root plastids teach us more about mycorrhizal symbiosis?

2007

International audience; The arbuscular mycorrhizal (AM) symbiosis is a mutualistic association between soil-borne fungi and the roots of most plant species. Involving the bilateral exchange of nutrients, the symbiosis is connected to drastic changes in plant cell organelle morphology and physiology. Root plastids, in particular, are forming extensive, network-like structures covering the main symbiotic interface, i.e., intracellular, highly branched haustorium-like fungal structures called arbuscules. These plastid networks are highly dynamic and are formed and degraded concomitantly with the formation and degradation of arbuscules. By producing basic metabolic building blocks like fatty ac…

Genes encoding transcription factors in Glomus intraradices and their expression at the appressoria stage of arbuscular mycorrhiza interactions

2007

International audience; Molecular pathways governing the life cycle of arbuscular mycorrhizal (AM) fungi and their symbiotic interactions with root tissues are not yet fully understood. Most studies fo fungal responses to host plants have targeted developmental stages before root contact (germinating spores), or after root colonization (intraradical mycelium). We are focusing on the early cell events of appressoria contact with the root surface which are essential to the successful outcome of the AM symbiosis. Recent monitoring of Glomus intraradices gene expression at this stage has revealed differential fungal responses to roots of host and non-host (Myc- mutants) M. truncatula (Seddas et…

Associer biostimulants, SDP, systèmes d’imagerie et de pulvérisation au service de la santé du vignoble

2016

Prod?IPMGEAPSISPEEAINRAUBAGROSUPDOCT; Associer biostimulants, SDP, systèmes d’imagerie et de pulvérisation au service de la santé du vignoble

Contribution of proteomics to arbuscular mycorrhiza in Medicago truncatula

2007

International audience; Because proteins are key effectors of plant responses to environmental cues including recognition, signalling, transport and defence reactions, main interest has been paid to characterize those involved in the establishment and functioning of arbuscular mycorrhizal (AM) symbiosis. In our group, the setting up of high throughput proteomic techniques on the model species, Medicago truncatula, is providing step-by-step a large-scale analysis of AM symbiosis-related proteins. Depending on the symbiotic stage targeted and on the abundance of mycorrhizal material, different proteomic strategies that can be combined with other large-scale approaches (transcriptomic and meta…

Acacias du Sahel : un espoir pour l'agriculture

1994

National audience

Les mycorhizes : la nouvelle révolution verte

2008

National audience

Free-living plant-beneficial microorganisms and soil quality.

2005

CABI Publishing, Wallingford Oxon, UK,

La microdissection laser: une technique d’analyse du profil d’expression génique et protéique des types cellulaires spécifiques de la symbiose mycorh…

2012

A new tool for assessment of biostimulants effects on grapevine

2018

National audience; Despite an increasing interest for the use of biostimulants (BS) in agriculture, methods allowing a precise description of their effects on plants remain rather limited. In the IRIS+ FUI project, two major and highly different worldwide crops, wheat (annual, monocotyledon) and grapevine (perennial, broadleaf) were chosen to deepen our knowledge of such compounds and explore their potential additional interest. One objective was to develop a tool adapted to the screening and study of the impact of a series of BS on the development and physiology of these crops in controlled conditions. We managed to develop such a tool adapted to grapevine herbaceous cuttings. It allows a …