The TGA Transcription Factors from Clade II Negatively Regulate the Salicylic Acid Accumulation in Arabidopsis

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dc.contributor.authorFonseca, Alejandro
dc.contributor.authorUrzua, Tomas
dc.contributor.authorJelenska, Joanna
dc.contributor.authorSbarbaro, Christopher
dc.contributor.authorSeguel, Aldo
dc.contributor.authorDuarte, Yorley
dc.contributor.authorGreenberg, Jean T.
dc.contributor.authorHoluigue, Loreto
dc.contributor.authorBlanco-Herrera, Francisca
dc.contributor.authorHerrera-Vasquez, Ariel
dc.date.accessioned2025-01-20T21:01:54Z
dc.date.available2025-01-20T21:01:54Z
dc.date.issued2022
dc.description.abstractSalicylic acid (SA) is a hormone that modulates plant defenses by inducing changes in gene expression. The mechanisms that control SA accumulation are essential for understanding the defensive process. TGA transcription factors from clade II in Arabidopsis, which include the proteins TGA2, TGA5, and TGA6, are known to be key positive mediators for the transcription of genes such as PR-1 that are induced by SA application. However, unexpectedly, stress conditions that induce SA accumulation, such as infection with the avirulent pathogen P. syringae DC3000/AvrRPM1 and UV-C irradiation, result in enhanced PR-1 induction in plants lacking the clade II TGAs (tga256 plants). Increased PR-1 induction was accompanied by enhanced isochorismate synthase-dependent SA production as well as the upregulation of several genes involved in the hormone's accumulation. In response to avirulent P. syringae, PR-1 was previously shown to be controlled by both SA-dependent and -independent pathways. Therefore, the enhanced induction of PR-1 (and other defense genes) and accumulation of SA in the tga256 mutant plants is consistent with the clade II TGA factors providing negative feedback regulation of the SA-dependent and/or -independent pathways. Together, our results indicate that the TGA transcription factors from clade II negatively control SA accumulation under stress conditions that induce the hormone production. Our study describes a mechanism involving old actors playing new roles in regulating SA homeostasis under stress.
dc.fuente.origenWOS
dc.identifier.doi10.3390/ijms231911631
dc.identifier.eissn1422-0067
dc.identifier.urihttps://doi.org/10.3390/ijms231911631
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/92977
dc.identifier.wosidWOS:000867732700001
dc.issue.numero19
dc.language.isoen
dc.revistaInternational journal of molecular sciences
dc.rightsacceso restringido
dc.subjectsalicylic acid
dc.subjectTGA transcription factors
dc.subjectPseudomonas syringae
dc.subjectAvrRPM1
dc.subjectUV-C
dc.subjecttga256
dc.subjectPR-1
dc.subjectpathogenesis-related 1
dc.subject.ods02 Zero Hunger
dc.subject.ods13 Climate Action
dc.subject.odspa02 Hambre cero
dc.subject.odspa13 Acción por el clima
dc.titleThe TGA Transcription Factors from Clade II Negatively Regulate the Salicylic Acid Accumulation in Arabidopsis
dc.typeartículo
dc.volumen23
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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