Abstract:
:Salicylic acid (SA) is an essential defence hormone in plants. Upon pathogen infection, induced biosynthesis of SA is mediated by Isochorismate synthase 1 (ICS1), whose gene transcription is controlled mainly through two redundant transcription factors, SAR Deficient 1 (SARD1) and Calmodulin-binding protein 60-like g (CBP60g). Although these master transcription factors regulate not only positive, but also negative regulators of immunity, how they control signaling events downstream of different immune receptors is unclear. Using autoimmune mutants activating immunity mediated by different receptors we show that, although the sard1 cbp60g double mutant almost fully suppresses the activation of defence mediated by suppressor of npr1-1, constitutive 2 (snc2), it strikingly enhances snc1, which carries a gain-of-function mutation in an intracellular nucleotide-binding leucine-rich repeat (NLR) immune receptor. This negative regulation of immunity is achieved through the transcriptional regulation of negative regulators, such as Nudix hydrolase homolog 6 (NUDT6). Our study highlights the diverse roles, especially the negative ones, in the regulation of plant immunity by the two master immune transcription factors SARD1 and CBP60g.
journal_name
J Integr Plant Bioljournal_title
Journal of integrative plant biologyauthors
Sun T,Liang W,Zhang Y,Li Xdoi
10.1111/jipb.12698subject
Has Abstractpub_date
2018-11-01 00:00:00pages
1023-1027issue
11eissn
1672-9072issn
1744-7909journal_volume
60pub_type
信件abstract::Plants have evolved a large number of transcription factors (TF), which are enriched among duplicate genes, highlighting their roles in complex regulatory networks. The APETALA2/EREBP-like genes constitute a large plant TF family and participate in development and stress responses. To probe the conservation and diverg...
journal_title:Journal of integrative plant biology
pub_type: 杂志文章
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journal_title:Journal of integrative plant biology
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journal_title:Journal of integrative plant biology
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journal_title:Journal of integrative plant biology
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