Phosphate-induced resistance to pathogen infection in Arabidopsis.
Arabidopsis thaliana
Colletotrichum higginsianum
PHOSPHATE 2
Plectosphaerella cucumerina
immune response
jasmonic acid (JA)
microRNA399 (miR399)
phosphate (Pi)
reactive oxygen species (ROS)
salicylic acid (SA)
Journal
The Plant journal : for cell and molecular biology
ISSN: 1365-313X
Titre abrégé: Plant J
Pays: England
ID NLM: 9207397
Informations de publication
Date de publication:
04 2022
04 2022
Historique:
revised:
30
12
2021
received:
13
02
2021
accepted:
17
01
2022
pubmed:
22
1
2022
medline:
29
4
2022
entrez:
21
1
2022
Statut:
ppublish
Résumé
In nature, plants are concurrently exposed to a number of abiotic and biotic stresses. Our understanding of convergence points between responses to combined biotic/abiotic stress pathways remains, however, rudimentary. Here we show that MIR399 overexpression, loss-of-function of PHOSPHATE2 (PHO2), or treatment with high phosphate (Pi) levels is accompanied by an increase in Pi content and accumulation of reactive oxygen species (ROS) in Arabidopsis thaliana. High Pi plants (e.g., miR399 overexpressors, pho2 mutants, and plants grown under high Pi supply) exhibited resistance to infection by necrotrophic and hemibiotrophic fungal pathogens. In the absence of pathogen infection, the expression levels of genes in the salicylic acid (SA)- and jasmonic acid (JA)-dependent signaling pathways were higher in high Pi plants compared to wild-type plants grown under control conditions, which is consistent with increased levels of SA and JA in non-infected high Pi plants. During infection, an opposite regulation in the two branches of the JA pathway (ERF1/PDF1.2 and MYC2/VSP2) occurs in high Pi plants. Thus, while pathogen infection induces PDF1.2 expression in miR399 OE and pho2 plants, VSP2 expression is downregulated by pathogen infection in these plants. This study supports the notion that Pi accumulation promotes resistance to infection by fungal pathogens in Arabidopsis, while providing a basis to better understand interactions between Pi signaling and hormonal signaling pathways for modulation of plant immune responses.
Identifiants
pubmed: 35061924
doi: 10.1111/tpj.15680
pmc: PMC9303409
doi:
Substances chimiques
Arabidopsis Proteins
0
Cyclopentanes
0
Oxylipins
0
Phosphates
0
Salicylic Acid
O414PZ4LPZ
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
452-469Informations de copyright
© 2022 The Authors. The Plant Journal published by Society for Experimental Biology and John Wiley & Sons Ltd.
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