Multiple functional roles of flavonoids in photoprotection

Agati, Giovanni; Tattini, Massimiliano

doi:10.1111/j.1469-8137.2010.03269.x

Cited by 681 publications

(536 citation statements)

References 97 publications

(160 reference statements)

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“…Those results validate the hypothesis stating that anthocyanins play an important role in protecting plants against excessive visible light or UV-B radiation (Burchard et al 2000;Gould 2004;Agati and Tattini 2010;Fallovo et al 2011).…”

Section: Discussionsupporting

confidence: 77%

“…The differences in flavone and flavonol concentrations in plants exposed to various light intensities can probably be attributed to the roles played by those compounds in epidermis and mesophilic cells (Agati and Tattini 2010). There is evidence that the levels of epidermal flavonoids increase under exposure to UV-B irradiation, whereas the con-*Further details about the Electronic Supplementary Material (ESM) can be found at the end of the article.…”

Section: Discussionmentioning

confidence: 99%

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Enhanced light intensity increases flavonol and anthocyanin concentrations but reduces flavone levels in the cotyledons of common buckwheat seedlings

Dębski

Wiczkowski

Szawara-Nowak

et al. 2017

Cereal Research Communications

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The effects of two light intensities on the concentration of several flavonoids were investigated in the cotyledons of common buckwheat seedlings. The study was performed on four days old seedlings of cvs. Hruszowska, Panda, Kora and Red Corolla. One group of seedlings was grown under exposure to 180 ± 20 μmol • m -2 • s -1 photosynthetically active radiation, whereas the other group was exposed to 360 ± 20 μmol • m -2 • s -1 . The experiment lasted 5 days. The results revealed that light intensity induces changes in the levels of flavonols and flavones. Increased light intensity contributed to a decrease in the concentrations of all flavone C-glucosides: orientin (luteolin-8-C-glucoside) and iso-orientin (luteolin-6-C-glucoside), and apigenin: vitexin (apigenin-8-C-glucoside) and iso-vitexin (apigenin-6-C-glucoside). Simultaneously, a substantial increase in the content of flavonols, i.e. quercetin O-glycosides, was found. To the best of our knowledge, this is the first evidence to demonstrate the contrary responses of plant flavonols and flavones to light intensity. The content of anthocyanin also increased under exposure to higher light intensity. Our results indicate that quercetin O-glycosides can play a similar role to anthocyanins in the cotyledons of common buckwheat seedlings. Results of correlation analysis indicate that the increase in flavonol and anthocyanin concentrations in response to higher light intensity is maintained through reduced accumulation of flavones and proanthocyanidins.

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Section: Discussionsupporting

confidence: 77%

Section: Discussionmentioning

confidence: 99%

Enhanced light intensity increases flavonol and anthocyanin concentrations but reduces flavone levels in the cotyledons of common buckwheat seedlings

Dębski

Wiczkowski

Szawara-Nowak

et al. 2017

Cereal Research Communications

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“…Their concentrations fluctuate greatly in response to cellular circumstances such as high-light stress, especially UV-B light, and biotic stress during the defense against herbivores and pathogens (Harborne and Williams, 2000;Peters and Constabel, 2002;Agati and Tattini, 2010;Løvdal et al, 2010;Samanta et al, 2011;Wu et al, 2012) or abiotic stresses such as mineral nutrient depletion (Watanabe et al, 2010). Anthocyanin accumulation occurs in senescing leaves prior to chlorophyll breakdown (Feild et al, 2001).…”

Section: Carbon-based Secondary Metabolites Under the Regulation Of Nmentioning

confidence: 99%

Comprehensive Dissection of Spatiotemporal Metabolic Shifts in Primary, Secondary, and Lipid Metabolism during Developmental Senescence in Arabidopsis

et al. 2013

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Developmental senescence is a coordinated physiological process in plants and is critical for nutrient redistribution from senescing leaves to newly formed sink organs, including young leaves and developing seeds. Progress has been made concerning the genes involved and the regulatory networks controlling senescence. The resulting complex metabolome changes during senescence have not been investigated in detail yet. Therefore, we conducted a comprehensive profiling of metabolites, including pigments, lipids, sugars, amino acids, organic acids, nutrient ions, and secondary metabolites, and determined approximately 260 metabolites at distinct stages in leaves and siliques during senescence in Arabidopsis (Arabidopsis thaliana). This provided an extensive catalog of metabolites and their spatiotemporal cobehavior with progressing senescence. Comparison with silique data provides clues to source-sink relations. Furthermore, we analyzed the metabolite distribution within single leaves along the basipetal sink-source transition trajectory during senescence. Ceramides, lysolipids, aromatic amino acids, branched chain amino acids, and stressinduced amino acids accumulated, and an imbalance of asparagine/aspartate, glutamate/glutamine, and nutrient ions in the tip region of leaves was detected. Furthermore, the spatiotemporal distribution of tricarboxylic acid cycle intermediates was already changed in the presenescent leaves, and glucosinolates, raffinose, and galactinol accumulated in the base region of leaves with preceding senescence. These results are discussed in the context of current models of the metabolic shifts occurring during developmental and environmentally induced senescence. As senescence processes are correlated to crop yield, the metabolome data and the approach provided here can serve as a blueprint for the analysis of traits and conditions linking crop yield and senescence.

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“…Their presence in the walls of epidermal cells is generally associated with UV protection, whereas the presence of mesophyll cells in vacuoles and chloroplasts is linked with reactive oxygen species scavenging [1]. According to many reports, UV-B radiation increases flavonoid levels in young plants [2,19,21,25].…”

Section: Resultsmentioning

confidence: 99%

UV-B radiation increases anthocyanin levels in cotyledons and inhibits the growth of common buckwheat seedlings

Dębski¹,

Szwed²,

Wiczkowski³

et al. 2016

Acta Biologica Hungarica

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The impact of short-term UV-B treatment on the content of individual flavonoids and photosynthetic pigments in cotyledons and the growth of common buckwheat (Fagopyrum esculentum Moench) seedlings was investigated. Seeds of four common buckwheat cultivars were germinated in darkness over a period of 4 days and acclimatized for 2 days under a 16/8 h light/dark photoperiod at 24/18 °C day/night, and exposure to 100-120 μmol • m -2 • s -1 of photosynthetically active radiation (PAR). Seedlings were divided into three batches, including two batches subjected to different doses of UV-B (5 W • m -2 and 10 W • m -2 , one hour per day) for 5 days, and a control group exposed to PAR only. Exposure to UV-B increased anthocyanin levels in the cotyledons of all examined cultivars, it inhibited hypocotyl elongation, but did not affect the content of photosynthetic pigments. Flavone concentrations increased in cv. Red Corolla and Kora, remained constant in cv. Panda and decreased in cv. Hruszowska. Exposure to UV-B decreased rutin levels in cv. Hruszowska, but not in the remaining cultivars. Cultivars Hruszowska, Panda and Kora appeared to be less resistant to UV-B than Red Corolla. Higher resistance to UV-B radiation in Red Corolla can probably be attributed to its higher content of anthocyanins and rutin in comparison with the remaining cultivars.

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Multiple functional roles of flavonoids in photoprotection

Cited by 681 publications

References 97 publications

Enhanced light intensity increases flavonol and anthocyanin concentrations but reduces flavone levels in the cotyledons of common buckwheat seedlings

Enhanced light intensity increases flavonol and anthocyanin concentrations but reduces flavone levels in the cotyledons of common buckwheat seedlings

Comprehensive Dissection of Spatiotemporal Metabolic Shifts in Primary, Secondary, and Lipid Metabolism during Developmental Senescence in Arabidopsis

UV-B radiation increases anthocyanin levels in cotyledons and inhibits the growth of common buckwheat seedlings

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