Salicylic Acid and Reactive Oxygen Species in the Activation of Stress Defense Genes

Holuigue, Loreto; Salinas, Paula; Blanco, Francisca; Garretón, Virginia

doi:10.1007/1-4020-5184-0_8

Cited by 19 publications

(23 citation statements)

References 205 publications

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“…Results reported here support an antioxidant role for SA and strengthen previous evidences showing that SA triggers rapid activation of genes with antioxidant and detoxifying activities, through an NPR1-independent pathway (Uquillas et al 2004;Blanco et al 2005;Holuigue et al 2007). Interestingly, in this class of early NPR1-independent SAIGs we detected genes coding for two glutaredoxins (GRXC9 and GRXS13), two glutathione S-transferases (AtGSTU7 and AtGSTF8) and 6 UDP-glycosyl transferase (UGT72B1, UGT75B1, UGT75D1, UGT74F2, UGT73B2, UGT73B1) (Table 3).…”

Section: Discussionsupporting

confidence: 90%

“…Looking for clues to understand SA role in defense to stress, we have focused our attention in the early responses triggered by this hormone. We previously described two pathways for rapid activation of SAIGs; one dependent on the NPR1 coactivator and other independent of it (Uquillas et al 2004;Blanco et al 2005;Holuigue et al 2007). The transcriptomic and expression analyses described in this article further support the existence of these two pathways for rapid activation of SAIGs; one independent of NPR1 used by 14% of these genes, and the other dependent of NPR1 used by the rest of them.…”

Section: Discussionsupporting

confidence: 66%

“…Increasing evidence supports the idea that SA also plays a role in controlling the cellular redox balance at the onset of the SAR (Mou et al 2003;Mateo et al 2006;Holuigue et al 2007). Treatment of Arabidopsis plants with INA produces a biphasic change of cellular redox potential (GSH/GSSG ratio): first a pro-oxidative effect and then an antioxidant effect of the SA analog (Mou et al 2003).…”

Section: Introductionmentioning

confidence: 81%

“…These transferases catalyze the formation of S-glutathionylated and O-glycosylated conjugates of different acceptor molecules. As we previously discussed (Blanco et al 2005;Holuigue et al 2007), these enzymes have been implicated in the detoxification of endogenous and xenobiotic compounds, being good candidates to diminish toxic effects of metabolites (including ROS) in the stress defense reaction (Lim and Bowles 2004;Edwards et al 2005).…”

Section: Discussionmentioning

confidence: 97%

“…The regulation of changes in the cellular redox status is one of the roles recently attributed to SA in pathogeninduced defenses and light acclimatory responses in Arabidopsis (Durrant and Dong 2004;Fobert and Despres 2005;Foyer and Noctor 2005;Mateo et al 2006;Holuigue et al 2007). This regulatory role seems relevant to SA function, considering that this hormone is also produced and required for defense responses to different stressful conditions associated to cellular oxidative stress, such as UV irradiation, ozone exposure and high light (Yalpani et al 1994;Surplus et al 1998;Rao and Davis 1999;Mateo et al 2006;Janda et al 2007).…”

Section: Discussionmentioning

confidence: 99%

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Early genomic responses to salicylic acid in Arabidopsis

et al. 2009

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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.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 66%

Section: Introductionmentioning

confidence: 81%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

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Early genomic responses to salicylic acid in Arabidopsis

et al. 2009

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Overlapping Horizons of Salicylic Acid under Different Stresses

Irfan

Hayat

Wani

et al. 2012

Crop Improvement Under Adverse Conditions

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Suppression of tomato SlGGP aggravates methyl viologen-mediated oxidative stress

Yang¹,

Ma²,

Liu³

et al. 2016

Biol. plant.

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Ascorbate (AsA) is an important antioxidant that can scavenge reactive oxygen species to protect plant cells against oxidative stress. GDP-L-galactose phosphorylase (GGP) is a key enzyme in the AsA biosynthetic pathway. To investigate the functions of GGP in AsA synthesis and oxidative stress tolerance in tomato, antisense lines with reduced expression of GDP-L-galactose phosphorylase gene (SlGGP) were obtained. Photobleaching after treatment of leaf disks with methyl viologen was more severe in transgenic lines compared to wild type (WT) plants. Moreover, compared with WT plants, transgenic plants showed higher content of hydrogen peroxide, superoxide anion, malondialdehyde as well as ion leakage, but lower content of AsA and chlorophylls, ascorbate peroxidase activity, net photosynthetic rate, and maximal photochemical efficiency of photosystem II. Results of real-time quantitative polymerase chain reaction showed that suppression of SlGGP gene in transgenic plants reduced their oxidative stress tolerance.

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Salicylic Acid and Reactive Oxygen Species in the Activation of Stress Defense Genes

Cited by 19 publications

References 205 publications

Early genomic responses to salicylic acid in Arabidopsis

Early genomic responses to salicylic acid in Arabidopsis

Overlapping Horizons of Salicylic Acid under Different Stresses

Suppression of tomato SlGGP aggravates methyl viologen-mediated oxidative stress

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