Involvement of auxin pathways in modulating root architecture during beneficial plantmicroorganism interactions
Résumé
A wide variety of microorganisms known to produce auxin and auxin precursors form beneficial relationships with plants and alter host root development. Moreover, other signals produced by microorganisms affect auxin pathways in host plants. However, the precise role of auxin and auxin-signalling pathways in modulating plantmicrobe interactions is unknown. Dissecting out the auxin synthesis, transport and signalling pathways resulting in the characteristic molecular, physiological and developmental response in plants will further illuminate upon how these intriguing inter-species interactions of environmental, ecological and economic significance occur. The present review seeks to survey and summarize the scattered evidence in support of known host root modifications brought about by beneficial microorganisms and implicate the role of auxin synthesis, transport and signal transduction in modulating beneficial effects in plants. Finally, through a synthesis of the current body of work, we present outstanding challenges and potential future research directions on studies related to auxin signalling in plantmicrobe interactions.
Mots clés
arbuscular mycorrhiza
auxin
ectomycorrhiza
endophytes
plant growth-promoting fungi
plant growth-promoting rhizobacteria
plantmicrobe interaction
root development
FUNGUS HEBELOMA-CYLINDROSPORUM
ARBUSCULAR MYCORRHIZAL FUNGUS
PLANT-MICROBE INTERACTIONS
ARABIDOPSIS-THALIANA
PIRIFORMOSPORA-INDICA
SYSTEM ARCHITECTURE
LACCARIA-BICOLOR
PINUS-PINASTER
ECTOMYCORRHIZA FORMATION
PISOLITHUS-TINCTORIUS