DÍAZ, Francisca; DUSSARRAT, Thomas; CARRASCO-PUGA, Gabriela; COLOMBIE, Sophie; PRIGENT, Sylvain; DECROS, Guillaume; BERNILLON, Stéphane; CASSAN, Cédric; FLANDIN, Amélie; GUERRERO, Pablo; GIBON, Yves; ROLIN, Dominique; CAVIERES, Lohengrin; PÉTRIACQ, Pierre; LATORRE, Claudio; GUTIÉRREZ, Rodrigo

doi:10.1111/nph.19415

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Licence d’utilisation du document

DÍAZ, Francisca
Pontificia Universidad Católica de Valparaíso [PUCV]
Institute of Ecology and Biodiversity and Department of Ecological Sciences
Agencia Nacional de Investigación y Desarrollo [ANID]

DUSSARRAT, Thomas
Pontificia Universidad Católica de Chile [UC]
Biologie du fruit et pathologie [BFP]

CARRASCO-PUGA, Gabriela
Agencia Nacional de Investigación y Desarrollo [ANID]
Pontificia Universidad Católica de Chile [UC]

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Article de revue

Ce document a été publié dans

New Phytologist. 2024, vol. 241, n° 3, p. 1074-1087

Wiley

Résumé en anglais

Summary Plant–plant positive interactions are key drivers of community structure. Yet, the underlying molecular mechanisms of facilitation processes remain unexplored. We investigated the ‘nursing’ effect of Maihueniopsis camachoi , a cactus that thrives in the Atacama Desert between c . 2800 and 3800 m above sea level. We hypothesised that an important protective factor is thermal amelioration of less cold‐tolerant species with a corresponding impact on molecular phenotypes. To test this hypothesis, we compared plant cover and temperatures within the cactus foliage with open areas and modelled the effect of temperatures on plant distribution. We combined eco‐metabolomics and machine learning to test the molecular consequences of this association. Multiple species benefited from the interaction with M. camachoi . A conspicuous example was the extended distribution of Atriplex imbricata to colder elevations in association with M. camachoi (400 m higher as compared to plants in open areas). Metabolomics identified 93 biochemical markers predicting the interaction status of A. imbricata with 79% accuracy, independently of year. These findings place M. camachoi as a key species in Atacama plant communities, driving local biodiversity with an impact on molecular phenotypes of nursed species. Our results support the stress‐gradient hypothesis and provide pioneer insights into the metabolic consequences of facilitation.< Réduire

Mots clés en anglais

Maihueniopsis camachoi

Atacama Desert

eco-metabolomics

facilitation

machine learning

positive interactions

DOI

http://dx.doi.org/10.1111/nph.19415

Project ANR

Développement d'une infrastructure française distribuée pour la métabolomique dédiée à l'innovation - ANR-11-INBS-0010
Centre français de phénomique végétale - ANR-11-INBS-0012

Origine

Importé de hal

Unités de recherche

Biologie du Fruit & Pathologie (BFP) - UMR 1332