Damage and protection of the photosynthetic apparatus from UV-B radiation. II. Effect of quercetin at different pH

Dobrikova, Anelia G.; Аpostolova, Emilia

doi:10.1016/j.jplph.2015.06.008

Cited by 33 publications

(19 citation statements)

References 53 publications

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“…Enhanced chemiluminescence studies haves shown antioxidant role of flavonoids and other polyphenols found in tea [47]. Some recent studies also support the finding that QR has also been shown to suppress toxicity and oxidative stress in vivo and in vitro [48–52]. …”

Section: Discussionmentioning

confidence: 89%

Hepatoprotective effect of Quercetin supplementation against Acrylamide-induced DNA damage in wistar rats

Ansar

Siddiqi

Zargar

et al. 2016

BMC Complement Altern Med

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BackgroundQuercetin (QR), is a polyphenolic flavonoid compound which is found in large amounts in certain foods, and protects against oxidative stress. The current study was conducted to determine whether Quercetin can possibly exert hepatoprotective and antioxidant activity against acrylamide (ACR) induced toxicity in rats.MethodsFour groups of Wistar rats consisting of six rats each: (i) control group; (ii) ACR treated group (50 mg/kg bw); (iii) QR group: rats were treated with QR (10 mg/kg bw); (iv) QR (10 mg/kg bw) was given i.p. for 5 days followed by ACR (50 mg/kg bw) on 5th day (single dose).ResultsACR caused an elevation in 8-OH guanosine level and a reduction in Glutahione S-transferase (GST) activity. Administration of QR significantly protected liver tissue against hepatotoxic effect of acrylamide from amelioration of the marker enzyme (p < 0.05) and DNA damage (p < 0.01) as evident by comet assay and, besides some indices of histopathological alterations.ConclusionIt is concluded that QR could protect the liver against DNA damage induced by ACR probably is thus capable of ameliorating ACR-induced changes in the rat livers.

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Section: Discussionmentioning

confidence: 89%

Hepatoprotective effect of Quercetin supplementation against Acrylamide-induced DNA damage in wistar rats

Ansar

Siddiqi

Zargar

et al. 2016

BMC Complement Altern Med

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“…This place of occurrence suggests its role in regulating and limiting the intensity of light available to the plant [15]. Quercetin plays an important role in the process of protecting plants against the effects of stress such as: UV radiation or osmotic stress, as has been confirmed in numerous studies [16][17][18]. In osmotic stress, glycosidic derivatives of flavonoids play a significant role in the osmoregulation process.…”

Section: Introductionmentioning

confidence: 79%

The Effect of Exogenous Application of Quercetin Derivative Solutions on the Course of Physiological and Biochemical Processes in Wheat Seedlings

Jańczak-Pieniążek

Migut

Piechowiak

et al. 2021

IJMS

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Quercetin, classified as a flavonoid, is a strong antioxidant that plays a significant role in the regulation of physiological processes in plants, which is particularly important in the case of biotic and abiotic stresses. The study investigated the effect of the use of potassium quercetin solutions in various concentrations (0.5%, 1.0%, 3.0% and 5.0%) on the physiological and biochemical properties of wheat seedlings. A pot experiment was carried out in order to determine the most beneficial dose of this flavonoid acting as a bio-stimulant for wheat plants. Spraying with quercetin derivative solutions was performed twice, and physiological measurements (chlorophyll content and fluorescence as well as gas exchange) were carried out on the first and seventh days after each application. The total phenolic compounds content and the total antioxidant capacity were also determined. It was shown that the concentrations of potassium quercetin applied have a stimulating effect on the course of physiological processes. In the case of most of the tested physiological parameters (chlorophyll content and fluorescence and gas exchange) and the total antioxidant capacity, no significant differences were observed in their increase as a result of application with concentrations of 3.0 and 5.0%. Therefore, the beneficial effect of quercetin on the analysed parameters is already observed when spraying with a concentration of 3.0%.

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“…Interestingly, the Chlamydomonas nuclear NAC2 is among the UV-B-induced genes in our transcriptomic analysis (2.5-fold), and its product, the chloroplast TPR-like NAC2 protein, is important for psbD mRNA stability (Boudreau et al, 2000). Also, it is possible that UV-B-induced secondary metabolites interact with thylakoid membranes and promote efficient damage repair (Dobrikova and Apostolova, 2015;Järvi et al, 2015). However, these and several other mechanisms can be envisaged and need to await experimental verification.…”

Section: Uv-b Acclimation and Tolerance In Chlamydomonasmentioning

confidence: 93%

UV-B Perception and Acclimation in Chlamydomonas reinhardtii

et al. 2016

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Plants perceive UV-B, an intrinsic component of sunlight, via a signaling pathway that is mediated by the photoreceptor UV RESISTANCE LOCUS8 (UVR8) and induces UV-B acclimation. To test whether similar UV-B perception mechanisms exist in the evolutionarily distant green alga Chlamydomonas reinhardtii, we identified Chlamydomonas orthologs of UVR8 and the key signaling factor CONSTITUTIVELY PHOTOMORPHOGENIC1 (COP1). Cr-UVR8 shares sequence and structural similarity to Arabidopsis thaliana UVR8, has conserved tryptophan residues for UV-B photoreception, monomerizes upon UV-B exposure, and interacts with Cr-COP1 in a UV-B-dependent manner. Moreover, Cr-UVR8 can interact with At-COP1 and complement the Arabidopsis uvr8 mutant, demonstrating that it is a functional UV-B photoreceptor. Chlamydomonas shows apparent UV-B acclimation in colony survival and photosynthetic efficiency assays. UV-B exposure, at low levels that induce acclimation, led to broad changes in the Chlamydomonas transcriptome, including in genes related to photosynthesis. Impaired UV-B-induced activation in the Cr-COP1 mutant hit1 indicates that UVR8-COP1 signaling induces transcriptome changes in response to UV-B. Also, hit1 mutants are impaired in UV-B acclimation. Chlamydomonas UV-B acclimation preserved the photosystem II core proteins D1 and D2 under UV-B stress, which mitigated UV-B-induced photoinhibition. These findings highlight the early evolution of UVR8 photoreceptor signaling in the green lineage to induce UV-B acclimation and protection.

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Damage and protection of the photosynthetic apparatus from UV-B radiation. II. Effect of quercetin at different pH

Cited by 33 publications

References 53 publications

Hepatoprotective effect of Quercetin supplementation against Acrylamide-induced DNA damage in wistar rats

Hepatoprotective effect of Quercetin supplementation against Acrylamide-induced DNA damage in wistar rats

The Effect of Exogenous Application of Quercetin Derivative Solutions on the Course of Physiological and Biochemical Processes in Wheat Seedlings

UV-B Perception and Acclimation in Chlamydomonas reinhardtii

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