NPR1-independent activation of immediate early salicylic acid-responsive genes in <i>Arabidopsis</i>

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dc.contributor.authorUquillas, C
dc.contributor.authorLetelier, I
dc.contributor.authorBlanco, F
dc.contributor.authorJordana, X
dc.contributor.authorHoluigue, L
dc.date.accessioned2025-01-21T01:08:28Z
dc.date.available2025-01-21T01:08:28Z
dc.date.issued2004
dc.description.abstractSalicylic acid (SA) is a key signal for the activation of defense genes in response to stress. The activation of late defense genes by SA, such as PR-1, involves the participation of the NPR1 protein. This protein acts as coactivator of the TGA factors that recognize as-1-like elements in the PR-1 promoter. Considering that functional as-1-like elements are also found in the promoter of SA- and auxin-responsive immediate early genes, we tested the hypothesis that NPR1 is also required for activation of these genes. The expression of the immediate early genes glutathione Stransferase (GST6) and glucosyltransferase (EIGT) was studied in npr1 mutant and wild-type Arabidopsis plants. In the npr1 mutant background, SA and 2,4-dichlorophenoxyacetic acid were unable to promote transcription of PR-1 but effectively stimulated the expression of GST6 and EIGT. Furthermore, increased binding of proteins to the GST6 as-1-like promoter element was detected in nuclear extracts from npr1 and wild-type plants after treatment with SA. In summary, these results indicate that activation of immediate early genes by SA proceeds through an NPRI-independent pathway. Therefore, we propose that activation by SA of immediate early and late genes occur by different mechanisms.
dc.fuente.origenWOS
dc.identifier.eissn1943-7706
dc.identifier.issn0894-0282
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96473
dc.identifier.wosidWOS:000220329300004
dc.issue.numero1
dc.language.isoen
dc.pagina.final42
dc.pagina.inicio34
dc.revistaMolecular plant-microbe interactions
dc.rightsacceso restringido
dc.subject.ods02 Zero Hunger
dc.subject.ods13 Climate Action
dc.subject.odspa02 Hambre cero
dc.subject.odspa13 Acción por el clima
dc.titleNPR1-independent activation of immediate early salicylic acid-responsive genes in <i>Arabidopsis</i>
dc.typeartículo
dc.volumen17
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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