|
www.radiofrance.fr/franceculture/podcasts/la-science-cqfd/bioacoustique-vegetale-pas-si-dure-de-la-feuille-4985480
On a observé que les plantes vascularisées étaient capables, en cas de stress hydrique, de produire des ultrasons par cavitation. Que connaît-on des capacités du monde végétal à produire et à recevoir des ondes sonores ? Que se passe-t-il physiologiquement ? Avec
Enjoying beautiful San Francisco and Asilomar, together with exciting science at this year Fungal Genetics meeting. A highlight on the last evening with our own Shantala collecting her best poster prize on stage!
A lire aussi, "Les plantes ne souffrent pas en silence" dans le numero 548, un commentaire écrit avec l'aide de notre équipe: www.pourlascience.fr/sd/biologie-vegetale/les-plantes-ne-souffrent-pas-en-silence-25119.php
From the abstract: Plants use programmed cell death as a potent defense response against biotrophic pathogens that require living host cells to thrive. However, cell death can promote infection by necrotrophic pathogens. This discrepancy creates specific co-evolutionary dynamics in the interaction between plants and necrotrophs. Necrotrophic pathogens produce diverse cell death-inducing effectors that act redundantly on several plant targets and sometimes suppress plant immune responses as an additional function. Plants use surface receptors that recognize necrotrophic effectors to increase quantitative disease resistance, some of which evolved independently in several plant lineages. Co-evolution has shaped molecular mechanisms involved in plant–necrotroph interactions into robust systems, relying on degenerate and multifunctional modules, general-purpose components, and compartmentalized functioning.
Our study on the structural landscape and structural evolution of fungal effectors is out in Nature Communications. Together with Mark Derbyshire from the CCDM at Curtin University, Perth, we compared predicted structures for >4000 secreted proteins produced by Ascomycete fungi of diverse lifestyles. We used in silico mutation scans and ancestral structure reconstruction to reveal patterns of evolution in broadly conserved families of proteins. We found that the evolution of these families oscillate around two trajectories: either changing the conformation of surface loops or building up energetic conflicts without structural change. We expect energetic conflicts in folded proteins to increase the propensity to interact with other proteins, a principle known as energetic frustration. Read the full article here:
Surface frustration re-patterning underlies the structural landscape and evolvability of fungal orphan candidate effectors
This picture appears as image of the month in the INRAE Plant health division newsletter in February (link for authorized readers: intranet.inrae.fr/spe/Communication/Newsletter-SPE/SPEnews/2023/35/Pele-Mele/Microtubules-de-cellules-d-Arabidopsis-thaliana)
It was taken by Ophélie Léger back in 2019 during her work on the role of mechanical signals in plant immunity. The picture shows Arabidopsis microtubules viewed with a confocal microscope. Refers to the paper "Pathogen-derived mechanical cues potentiate the spatio-temporal implementation of plant defense" |
Archives
October 2025
Categories |
RSS Feed