Abstract:
:Salicylic acid (SA) is a stress-induced hormone involved in the activation of defense genes. Here we analyzed the early genetic responses to SA of wild type and npr1-1 mutant Arabidopsis seedlings, using Complete Arabidopsis Transcriptome MicroArray (CATMAv2) chip. We identified 217 genes rapidly induced by SA (early SAIGs); 193 by a NPR1-dependent and 24 by a NPR1-independent pathway. These two groups of genes also differed in their functional classification, expression profiles and over-representation of cis-elements, supporting differential pathways for their activation. Examination of the expression patterns for selected early SAIGs from both groups indicated that their activation by SA required TGA2/5/6 subclass of transcription factors. These genes were also activated by Pseudomonas syringae pv. tomato AvrRpm1, suggesting that they might play a role in defense against bacteria. This study gives a global idea of the early response to SA in Arabidopsis seedlings, expanding our knowledge about SA function in plant defense.
journal_name
Plant Mol Bioljournal_title
Plant molecular biologyauthors
Blanco F,Salinas P,Cecchini NM,Jordana X,Van Hummelen P,Alvarez ME,Holuigue Ldoi
10.1007/s11103-009-9458-1subject
Has Abstractpub_date
2009-05-01 00:00:00pages
79-102issue
1-2eissn
0167-4412issn
1573-5028journal_volume
70pub_type
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journal_title:Plant molecular biology
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journal_title:Plant molecular biology
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journal_title:Plant molecular biology
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pub_type: 杂志文章,评审
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