Xanthomonas translucens commandeers the host rate-limiting step in ABA biosynthesis for disease susceptibility.
Proc Natl Acad Sci U S A
; 116(42): 20938-20946, 2019 10 15.
Article
en En
| MEDLINE
| ID: mdl-31575748
ABSTRACT
Plants are vulnerable to disease through pathogen manipulation of phytohormone levels, which otherwise regulate development, abiotic, and biotic responses. Here, we show that the wheat pathogen Xanthomonas translucens pv. undulosa elevates expression of the host gene encoding 9-cis-epoxycarotenoid dioxygenase (TaNCED-5BS), which catalyzes the rate-limiting step in the biosynthesis of the phytohormone abscisic acid and a component of a major abiotic stress-response pathway, to promote disease susceptibility. Gene induction is mediated by a type III transcription activator-like effector. The induction of TaNCED-5BS results in elevated abscisic acid levels, reduced host transpiration and water loss, enhanced spread of bacteria in infected leaves, and decreased expression of the central defense gene TaNPR1 The results represent an appropriation of host physiology by a bacterial virulence effector.
Palabras clave
Texto completo:
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Banco de datos:
MEDLINE
Asunto principal:
Enfermedades de las Plantas
/
Reguladores del Crecimiento de las Plantas
/
Triticum
/
Xanthomonas
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Ácido Abscísico
Idioma:
En
Año:
2019
Tipo del documento:
Article