UV-B damage and protection at the molecular level in plants

Strid, Åke; Chow, Wah Soon; Anderson, Jan M.

doi:10.1007/bf00014600

Cited by 367 publications

(192 citation statements)

References 82 publications

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“…However, the Arabidopsis studies suggest that phenylpropanoids may not only act as filters of harmful UV radiation but also help to prevent active oxygen-mediated toxicity. These are, in fact, complementary roles, since UV irradiation is known to enhance free radical production in plants (Strid, Chow & Anderson 1994). …”

Section: Discussionmentioning

confidence: 99%

Seasonal differences in foliar content of chlorogenic acid, a phenylpropanoid antioxidant, in Mahonia repens

Grace

Logan

Adams

1998

Plant Cell & Environment

121

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To assess the possible physiological function of chlorogenic acid (CGA, 3-O-caffeoylquinic acid) in vivo, we characterized the free radical scavenging properties of pure phenylpropanoids and leaf extracts against two free radicals, superoxide and the 2,2'-azinobis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) radical cation. CGA was found to be a highly efficient scavenger of these free radicals, surpassing the activity of all other phenylpropanoids tested, as well as the 'classical' antioxidant ascorbate. Seasonal differences in the leaf content of CGA were examined in field populations of the broadleaf evergreen ). Sun-acclimated, but not shade-acclimated, leaves also produced high levels of anthocyanins in winter, suggesting a simultaneous increase in carbon flow through the phenylpropanoid and flavonoid pathways in response to high light and seasonal low temperature stress. In summer, high light-acclimated leaves contained ≈ 2-fold less CGA than in winter, whereas CGA levels were similar between seasons in shaded leaves. Consistent with the strong scavenging capacity of CGA measured in vitro, a linear correlation was observed between CGA content and the antioxidant activity of leaf extracts in both scavenging assays. On the basis of these results, we propose that CGA is a powerful hydrogen-donating antioxidant that may play an important role in mitigating the effects of oxidative stress in plants.

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Section: Discussionmentioning

confidence: 99%

Seasonal differences in foliar content of chlorogenic acid, a phenylpropanoid antioxidant, in Mahonia repens

Grace

Logan

Adams

1998

Plant Cell & Environment

121

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“…For example, the xanthophyll pigment cycle decreases the quantum yield of PS II by increasing heat dissipation (Demmig-Adams and Adams 1992). The mechanisms of UVR inhibition of photosynthesis are comparable to those for high PAR with the addition of causing decreased activity of Rubisco, the primary carbon fixation enzyme (Strid et al 1994;Bischof et al 2000a). Many plants and algae use strategies to minimize photoinhibition.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of freshwater macrophytes to UV radiation: relationship to depth zonation in an oligotrophic New Zealand lake

Rae¹,

Hanelt

Hawes³

2001

Mar. Freshwater Res.

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Abstract. The ultraviolet radiation (UVR) responses of photosynthesis by two freshwater vascular plants, Potamogeton cheesemanii and Isoetes alpinus, and the characean algae Chara fibrosa and C. corallina in Lake Coleridge, New Zealand, were investigated. Experiments comprised 4-5 h of exposure to different UV wavelengths followed by 17 h of recovery in low light. Photosynthetic competence was assessed by pulse-amplitude-modulated fluorometry. The four species showed different sensitivities to UVR, which were consistent with their upper depth limits. The shallowest-growing species, P. cheesemanii, was uninhibited by UVR, whereas after 5 h of exposure to UVR, inhibition of 15%, 38% and 48% was measured for I. alpinus, C. fibrosa and C. corallina collected from 4 m, 6.2 m and 16.5 m, respectively. Not all plants recovered fully from UVR inhibition. Plants from upper and lower depths of their growth range did not generally differ in inhibition sustained or ability to recover photosynthesis. The species with greatest tolerance of UVR also contained the highest concentrations of UVR-absorbing pigments. Freshwater macrophytes have differing abilities to tolerate UVR exposure through repair and/or protection strategies and these may be related to their vertical zonation.

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“…Also, SOD expression was not affected by UV-B radiation in Nicotiana plumbaginifolia L. (Willekens et al, 1994), but was decreased in Pisum sativum (Strid et al, 1994). In a field study, supplemental UV-B increased SOD activity in wheat and mung bean (Agrawal and Rathore, 2007).…”

Section: The Antioxidant Defense Systemmentioning

confidence: 99%

“…The inhibition effect on plant growth and development was mainly due to enhanced oxidative stress caused by UV radiation (Jansen et al, 1998). It has also been reported that UV-B can promote the formation of lipid oxidation products, destroy the natural lipid soluble antioxidants (Salmon et al, 1990), and induce the expression of the genes which encode for antioxidants (Strid et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

Advances in Crop Responses to Enhanced Uv-B Radiation

Li¹

2016

Appl Ecol Env Res

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The increased ultraviolet-B (UV-B) radiation (280-320 nm) on the Earth's surface is one of the most important concerns of global change. This concern is primarily because increased UV-B radiation has been unambiguously shown to be responsible for the majority of harmful effects on aquatic as well as terrestrial organisms, and thus influence ecological interactions. For the past 4 plus decades, many studies have been conducted on the damaging effects of elevated UV-B radiation on plants. These studies have shown a diverse range of responses to UV-B radiation, and might be in general arbitrarily divided into two classes, photomorphogenic and stress responses at the morphological, physiological, biochemical and molecular levels. Crop plants evolved different adaptive or defensive mechanisms to UV-B radiation, including accumulation of UV-absorbing sunscreens, production of enzymatic and non-enzymatic antioxidants, changes of phytohormones or activation of DNA-repairing enzymes. A diagram illustrating the general responses of UV-B radiation and complexity of the interactions among factors was developed. Three urgent specific researches are proposed, which might provide opportunities for genetic engineering and possibility of breeding to deal with potential crop yield reductions due to elevated UV-B in agricultural systems, and thus will play a major role in determining the crops future.

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UV-B damage and protection at the molecular level in plants

Cited by 367 publications

References 82 publications

Seasonal differences in foliar content of chlorogenic acid, a phenylpropanoid antioxidant, in Mahonia repens

Seasonal differences in foliar content of chlorogenic acid, a phenylpropanoid antioxidant, in Mahonia repens

Sensitivity of freshwater macrophytes to UV radiation: relationship to depth zonation in an oligotrophic New Zealand lake

Advances in Crop Responses to Enhanced Uv-B Radiation

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