Microbe-induced coordination of plant iron-sulfur metabolism enhances high-light-stress tolerance of Arabidopsis  

作　　者：Kirti Shekhawat Alaguraj Veluchamy Anam Fatima Gabriel X.García-Ramírez Jean-Philippe Reichheld Olga Artyukh Katja Fröhlich Alexander Polussa Sabiha Parween Arun Prasanna Nagarajan Naganand Rayapuram Heribert Hirt 

机构地区：[1]Biological and Environmental Sciences and Engineering Division,King Abdullah University of Science and Technology(KAUST),23955-6900 Thuwal,Saudi Arabia [2]Department of Computational Biology,St.Jude Children’s Research Hospital,Danny Thomas Place,Memphis,TN 38105,USA [3]Max Planck Institute for Plant Breeding Research,50829 Cologne,Germany [4]Laboratoire Génome et Développement des Plantes,UniversitéPerpignan Via Domitia,66860 Perpignan,France [5]Laboratoire Génome et Développement des Plantes,CNRS,66860 Perpignan,France [6]The Forest School,Yale School of the Environment,Yale University,New Haven,CT 06520,USA

出　　处：《Plant Communications》2024年第11期83-98,共16页植物通讯（英文）

基　　金：King Abdullah University of Science and Technology(KAUST)base fund for H.H.no.BAS/1/1062-01-01.J.-P.R.was supported by the Agropolis Fondation(Flagship Project CalClim grant no.1802-002).

摘　　要：High-light stress strongly limits agricultural production in subtropical and tropical regions owing to photo-oxidative damage,decreased growth,and decreased yield.Here,we investigated whether beneficial mi-crobes can protect plants under high-light stress.We found that Enterobacter sp.SA187(SA187)supports the growth of Arabidopsis thaliana under high-light stress by reducing the accumulation of reactive oxygen species and maintaining photosynthesis.Under high-light stress,SA187 triggers dynamic changes in the expression of Arabidopsis genes related to fortified iron metabolism and redox regulation,thereby enhancing the antioxidative glutathione/glutaredoxin redox system of the plant.Genetic analysis showed that the enhancement of iron and sulfur metabolism by SA187 is coordinated by ethylene signaling.In sum-mary,beneficial microbes could be an effective and inexpensive means of enhancing high-light-stress tolerance in plants.

关 键 词：high-light stress beneficial plant-microbe interaction redox regulation glutaredoxins ethylene signaling 

分 类 号：Q945.78[生物学—植物学]