Role of salicylic acid in regulating ultraviolet radiation-induced oxidative stress in pepper leaves

Mahdavian, Kobra; Ghorbanli, M; Kalantari, Khosrow Manouchehri

doi:10.1134/s1021443708040195

Cited by 41 publications

(25 citation statements)

References 25 publications

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“…Defense responses after UV exposure always involve an oxidative burst caused by the ROS (Mahdavian et al, 2008a;Proch azkov a and Wilhelmov a, 2007). It was shown in this study that UV-C and resveratrol could induce increased ROS accumulation in plants (Fig.…”

Section: Discussionmentioning

confidence: 99%

Changes of resveratrol and antioxidant enzymes during UV-induced plant defense response in peanut seedlings

Tang

Zhan

Yang

et al. 2010

Journal of Plant Physiology

104

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Section: Discussionmentioning

confidence: 99%

Changes of resveratrol and antioxidant enzymes during UV-induced plant defense response in peanut seedlings

Tang

Zhan

Yang

et al. 2010

Journal of Plant Physiology

104

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“…Generation of ROS, in particular H 2 O 2 , has been reported following exposure to UV‐C radiation at high single dosages or repeated exposure (Mahdavian et al . ; Tang et al . ).…”

Section: Discussionmentioning

confidence: 99%

Sub‐lethal UV‐C radiation induces callose, hydrogen peroxide and defence‐related gene expression in Arabidopsis thaliana

2014

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Exposure of plants to UV-C irradiation induces gene expression and cellular responses that are commonly associated with wounding and pathogen defence, and in some cases can lead to increased resistance against pathogen infection. We examined, at a physiological, molecular and biochemical level, the effects of and responses to, sub-lethal UV-C exposure on Arabidopsis plants when irradiated with increasing dosages of UV-C radiation. Following UV-C exposure plants had reduced leaf areas over time, with the severity of reduction increasing with dosage. Severe morphological changes that included leaf glazing, bronzing and curling were found to occur in plants treated with the 1000 J·m(-2) dosage. Extensive damage to the mesophyll was observed, and cell death occurred in both a dosage- and time-dependent manner. Analysis of H₂O₂ activity and the pathogen defence marker genes PR1 and PDF1.2 demonstrated induction of these defence-related responses at each UV-C dosage tested. Interestingly, in response to UV-C irradiation the production of callose (β-1,3-glucan) was identified at all dosages examined. Together, these results show plant responses to UV-C irradiation at much lower doses than have previously been reported, and that there is potential for the use of UV-C as an inducer of plant defence.

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“…It has also been shown that SA promotes tolerance to UV; NahG‐expressing Arabidopsis (with low SA levels) show increased sensitivity to UV (Besteiro et al. , 2011) and application of SA to some plants has been shown to increase UV‐induced antioxidant capacity (Mahdavian et al. , 2008).…”

Section: Discussionmentioning

confidence: 99%

The Mediator subunit SFR6/MED16 controls defence gene expression mediated by salicylic acid and jasmonate responsive pathways

et al. 2012

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Summary Arabidopsis SENSITIVE TO FREEZING6 (SFR6) controls cold‐ and drought‐inducible gene expression and freezing‐ and osmotic‐stress tolerance. Its identification as a component of the MEDIATOR transcriptional co‐activator complex led us to address its involvement in other transcriptional responses. Gene expression responses to Pseudomonas syringae, ultraviolet‐C (UV‐C) irradiation, salicylic acid (SA) and jasmonic acid (JA) were investigated in three sfr6 mutant alleles by quantitative real‐time PCR and susceptibility to UV‐C irradiation and Pseudomonas infection were assessed. sfr6 mutants were more susceptible to both Pseudomonas syringae infection and UV‐C irradiation. They exhibited correspondingly weaker PR (pathogenesis‐related) gene expression than wild‐type Arabidopsis following these treatments or after direct application of SA, involved in response to both UV‐C and Pseudomonas infection. Other genes, however, were induced normally in the mutants by these treatments. sfr6 mutants were severely defective in expression of plant defensin genes in response to JA; ectopic expression of defensin genes was provoked in wild‐type but not sfr6 by overexpression of ERF5. SFR6/MED16 controls both SA‐ and JA‐mediated defence gene expression and is necessary for tolerance of Pseudomonas syringae infection and UV‐C irradiation. It is not, however, a universal regulator of stress gene transcription and is likely to mediate transcriptional activation of specific regulons only.

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Role of salicylic acid in regulating ultraviolet radiation-induced oxidative stress in pepper leaves

Cited by 41 publications

References 25 publications

Changes of resveratrol and antioxidant enzymes during UV-induced plant defense response in peanut seedlings

Changes of resveratrol and antioxidant enzymes during UV-induced plant defense response in peanut seedlings

Sub‐lethal UV‐C radiation induces callose, hydrogen peroxide and defence‐related gene expression in Arabidopsis thaliana

The Mediator subunit SFR6/MED16 controls defence gene expression mediated by salicylic acid and jasmonate responsive pathways

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