Effects of UV radiation on aquatic ecosystems and interactions with climate change

Photochemical & Photobiological Sciences, Год журнала: 2011, Номер 10(2), С. 242 - 260

Опубликована: Янв. 20, 2011

Язык: Английский

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Anthropogenic pollution of aquatic ecosystems: Emerging problems with global implications

The Science of The Total Environment, Год журнала: 2020, Номер 713, С. 136586 - 136586

Опубликована: Янв. 9, 2020

Язык: Английский

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Ozone depletion and climate change: impacts on UV radiation

Photochemical & Photobiological Sciences, Год журнала: 2011, Номер 10(2), С. 182 - 198

Опубликована: Янв. 20, 2011

Язык: Английский

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A UV-B-specific signaling component orchestrates plant UV protection

Proceedings of the National Academy of Sciences, Год журнала: 2005, Номер 102(50), С. 18225 - 18230

Опубликована: Дек. 5, 2005

UV-B radiation in sunlight has diverse effects on humans, animals, plants, and microorganisms. can cause damage to molecules cells, consequently organisms need protect against repair UV survive sunlight. In low nondamaging levels of stimulate transcription genes involved UV-protective responses. However, remarkably little is known about the underlying mechanisms perception signal transduction. Here we report that Arabidopsis RESISTANCE LOCUS 8 (UVR8) a UV-B-specific signaling component orchestrates expression range with vital functions. Moreover, show UVR8 regulates factor HY5 specifically when plant exposed UV-B. We demonstrate key effector pathway, it required for survival under radiation. sequence similarity eukaryotic guanine nucleotide exchange RCC1, but found activity. UVR8, like located principally nucleus associates chromatin via histones. Chromatin immunoprecipitation showed promoter region, providing mechanistic basis its involvement regulating transcription. conclude defines pathway plants protective gene responses

Язык: Английский

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Dual role of lignin in plant litter decomposition in terrestrial ecosystems

Proceedings of the National Academy of Sciences, Год журнала: 2010, Номер 107(10), С. 4618 - 4622

Опубликована: Фев. 23, 2010

Plant litter decomposition is a critical step in the formation of soil organic matter, mineralization nutrients, and carbon balance terrestrial ecosystems. Biotic mesic ecosystems generally negatively correlated with concentration lignin, group complex aromatic polymers present plant cell walls that recalcitrant to enzymatic degradation serves as structural barrier impeding microbial access labile compounds. Although photochemical has recently been shown be important semiarid ecosystems, chemistry controls on photodegradative losses are not understood. We evaluated importance photodegradation grass cellulose substrates varying levels lignin [cellulose-lignin (CL) substrates] under field conditions. Using wavelength-specific light attenuation filters, we found light-driven mass loss was promoted by both UV visible radiation. The spectral dependence absorption spectrum but cellulose. Field incubations demonstrated increasing reduced biotic decomposition, expected, linearly increased photodegradation. In addition, content CL consistently decreased incubations. conclude dual role affecting depending dominant driver (biotic or abiotic) controlling turnover. Under conditions, preferentially degraded because it acts an effective light-absorbing compound over wide range wavelengths. This mechanistic understanding will allow for more accurate predictions dynamics

Язык: Английский

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Light-controlled flavonoid biosynthesis in fruits

Frontiers in Plant Science, Год журнала: 2014, Номер 5

Опубликована: Окт. 9, 2014

Light is one of the most important environmental factors affecting flavonoid biosynthesis in plants. The absolute dependency light to plant development has driven evolvement sophisticated mechanisms sense and transduce multiple aspects signal. effects can be categorized photoperiod (duration), intensity (quantity), direction quality (wavelength) including UV-light. Recently, new information been achieved on regulation light-controlled fruits, which flavonoids have a major contribution quality. This review focuses different conditions control fruit producing An overview currently known accumulation provided. R2R3 MYB transcription are regulate by differential expression distinct response specific wavelengths. Despite recent advances, many gaps remain understood transduction pathway biosynthesis. A better knowledge these regulatory likely useful for breeding programs aiming modify pattern.

Язык: Английский

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Effects of solar ultraviolet radiation on terrestrial ecosystems. Patterns, mechanisms, and interactions with climate change

Photochemical & Photobiological Sciences, Год журнала: 2011, Номер 10(2), С. 226 - 241

Опубликована: Янв. 20, 2011

Язык: Английский

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Direct and Indirect Effects of Climate Change on Amphibian Populations

Diversity, Год журнала: 2010, Номер 2(2), С. 281 - 313

Опубликована: Фев. 25, 2010

As part of an overall decline in biodiversity, populations many organisms are declining and species being lost at unprecedented rates around the world. This includes amphibians. Although numerous factors affecting amphibian populations, we show potential direct indirect effects climate change on amphibians individual, population community level. Shifts ranges predicted. Changes may affect survival, growth, reproduction dispersal capabilities. Moreover, can alter habitats including vegetation, soil, hydrology. Climate influence food availability, predator-prey relationships competitive interactions which structure. also pathogen-host dynamics greatly how diseases manifested. interact with other stressors such as UV-B radiation contaminants. The among all these complex probably driving some declines extinctions.

Язык: Английский

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Mycosporine-Like Amino Acids: Relevant Secondary Metabolites. Chemical and Ecological Aspects

Marine Drugs, Год журнала: 2011, Номер 9(3), С. 387 - 446

Опубликована: Март 21, 2011

Taxonomically diverse marine, freshwater and terrestrial organisms have evolved the capacity to synthesize, accumulate metabolize a variety of UV-absorbing substances called mycosporine-like amino acids (MAAs) as part an overall strategy diminish direct indirect damaging effects environmental ultraviolet radiation (UVR). Whereas enzymatic machinery synthesize MAAs was probably inherited from cyanobacteria ancestors via endosymbionts hypothesis, metazoans lack this biochemical pathway, but can acquire these compounds by trophic transference, symbiotic or bacterial association. In review we describe structure physicochemical properties MAAs, including recently discovered modern methods used for their isolation identification, updating previous reviews. On basis, metabolism distribution unique class metabolites among marine organism.

Язык: Английский

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Environmental effects of ozone depletion, UV radiation and interactions with climate change: UNEP Environmental Effects Assessment Panel, update 2017

Photochemical & Photobiological Sciences, Год журнала: 2018, Номер 17(2), С. 127 - 179

Опубликована: Фев. 1, 2018

Язык: Английский

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