UV-B as an environmental factor in plant life: stress and regulation

Rozema, J.; Staaij, J. van de; Björn, Lars Olof; Caldwell, Martyn M.

doi:10.1016/s0169-5347(96)10062-8

Cited by 623 publications

(462 citation statements)

References 42 publications

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“…Under these conditions the photosynthetic machinery is certainly among the primary targets of UV-B. However, under field conditions, the effects of the full solar spectrum on plant growth do not always reflect decrease in photosynthesis [48]. In this way, a model centered on chloroplast oxidant-antioxidant balance might not translate to environmentally relevant conditions.…”

Section: Discussionmentioning

confidence: 99%

UV-B effects on leaves—Oxidative stress and acclimation in controlled environments

2016

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As the steady decline in the Earth's stratospheric ozone layer and parallel increase in solar ultraviolet-B (UV-B: 280-315 nm) has come to an end, the focus of plant UV research has been shifted from regarding UV-B as threatening plant life to recognizing it as a regulatory factor. While UV-B photoreceptor mediated signaling is increasingly understood, the role of UV-B inducible reactive oxygen species is still to be explored. Earlier experiments with high UV-B irradiation doses and isolated thylakoid membranes demonstrated the potential of UV-B to trigger oxidative stress.However, under realistic UV conditions pro-oxidants cannot be reliably traced in more complex biological samples possessing an array of antioxidant defenses. In the absence of direct experimental evidence we must rely on indications and propose hypotheses on how and whether pro-oxidants, such as reactive oxygen species contribute to acclimative responses. Here we briefly review how a balance between pro-oxidants and antioxidants is affected by UV-B in whole plant experiments performed in controlled environments. A working hypothesis is proposed in which the extents of UVinduced peroxidase and superoxide dismutase activations affect the success of acclimation to UV-B.

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Section: Discussionmentioning

confidence: 99%

UV-B effects on leaves—Oxidative stress and acclimation in controlled environments

2016

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“…Light is an environmental signal that may induce biosynthesis of plant phenolic compounds (Grand et al 1982, Douglas 1996, Rozema et al 1997, presumably because of their UV-filtration action (Rozema et al 1997, Gitz et al 2004, as well as it is essential for driving photosynthesis and other key metabolic pathways (Thum et al 2003).…”

Section: Introductionmentioning

confidence: 99%

“…For example, it is not clear whether the dynamics of the import of Ca 2' is due to alterations of the xylem pathway in the fruitstalk or in the berry itself. In view of the specific role that some compounds have in providing the building blocks for the xylem conduits (Douglas 1996, Rozema et al 1997, Boerjan et al 2003, valuable information may plausibly be drawn from the determination of phenolics in the fruitstalk and in the berry. For these reasons, the present study was designed to determine whether differences in phenolic content between sun-exposed and artificially shaded fruits are present by separately investigating berries and fruitstalks during fruit development.…”

Section: Introductionmentioning

confidence: 99%

Phenolic compounds in young developing kiwifruit in relation to light exposure: Implications for fruit calcium accumulation

Montanaro

Treutter²,

Xiloyannis

2007

Journal of Plant Interactions

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The interaction between light availability and the biosynthesis of phenolic compounds in fruit of kiwifruit (Actinidia deliciosa var. deliciosa , C.F. Liang et A. R. Ferguson) was investigated. Fruits were exposed either to natural light or were artificially shaded while growing on mature vines and were analysed weekly during the first 11 weeks of development. Phenols were identified and quantified by using High Performance Liquid Chromatography (HPLC). Results showed that the predominant phenolic compounds were hydroxycinnamic acids (HCAs), flavonols and the flavan 3-ol epicatechin. Calcium (Ca 2' ), the main mineral nutrient involved in fruit quality was also determined. Light significantly increased the accumulation of both phenols and Ca 2' into the fruit. This work expands the list of known phenolics in kiwifruit and provides a possible explanation for the seasonal pattern of Ca 2' import into the fruit. Results on light Áphenol interaction being apparently beneficial for fruit Ca 2' accumulation, suggest that accurate canopy management could enhance fruit quality.

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“…The levels of solar UV-B radiation on earth vary markedly with the latitude, altitude, season and time of the day [ 1 ]. Plants distributed along lower latitudes or higher elevations, where UV-B radiation is higher, possess more pronounced adaptive mechanisms than those from higher latitudes and/or lower elevations [ 2 ].…”

mentioning

confidence: 99%

“…In plants UV-B radiation has a pronounced damaging effect on DNA, membranes and photosynthetic processes [ 1 ]. Damages affecting photosynthesis concern mainly PSII, the manganese cluster of the water splitting complex, disruption of thylakoid membranes, reduction of chlorophyll content, disturbance of membrane permeability, reduction of the activity and amount of Rubisco and other enzymes [ 1,2,4 ]. In addition, it has also been reported that PSII, in respect to its location, demonstrates different sensitivity towards UV-B radiation, the grana situated PSII being more sensitive than the stroma situated ones [ 5 ].…”

mentioning

confidence: 99%

Sensitivity of two Ecotypes of Arabidopsis thaliana (Cvi and Te) towards UV‑B Irradiation

Velitchkova¹,

Stanoeva²,

Popova³

2013

Proceeding BAS

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The susceptibility of Arabidopsis thaliana towards the detrimental effect of UV-B irradiation was investigated using two ecotypes, Cvi and Te. The effect of UV-B treatment on primary photosynthetic reactions -energy interaction between the main pigment-protein complexes and oxygen evolution, was evaluated at low (4 • C) and at room (22 • C) temperature. UV-B-induced alterations of investigated photosynthetic reactions are better expressed at 22 • C than at 4 • C for Cvi. For Te ecotype the energy interaction was suppressed to higher extent at 22 • C, while oxygen evolving activity was affected similarly at both temperatures. At low and room temperature, the energy interaction in the complex PSII-core antenna is affected stronger by UV-B treatment than the energy distribution between both photosystems, as revealed by fluorescence ratios of 77 K spectra. The results presented indicate that the Arabidopsis thaliana ecotype Cvi (Cape Verde Islands) is less affected by UV-B irradiation in respect to the investigated primary photosynthetic reactions than the ecotype Te (Finland).

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UV-B as an environmental factor in plant life: stress and regulation

Cited by 623 publications

References 42 publications

UV-B effects on leaves—Oxidative stress and acclimation in controlled environments

UV-B effects on leaves—Oxidative stress and acclimation in controlled environments

Phenolic compounds in young developing kiwifruit in relation to light exposure: Implications for fruit calcium accumulation

Sensitivity of two Ecotypes of Arabidopsis thaliana (Cvi and Te) towards UV‑B Irradiation

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