Effects of UV-B radiation on total phenolic, flavonoid and hypericin contents in<i>Hypericum retusum</i>Aucher grown under<i>in vitro</i>conditions

Namli, Sureyya; Işıkalan, Çiğdem; Akbaş, Filiz; Toker, Zuhal; Tilkat, Engin

doi:10.1080/14786419.2014.940588

Cited by 19 publications

(13 citation statements)

References 24 publications

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“…In our study, UV‐B stress dramatically changed the related enzyme activities and caused significant accumulation of vitamin C, phenolics and flavonoids in mung bean sprouts. Our results are in agreement with those of the previous studies, which reported that UV‐B stress can increase the content of vitamin C, phenolics and flavonoids in buckwheat sprouts (Tsurunaga et al ., ), fruit of the tomato (Castagna et al ., ), wheat (Agrawal & Rathore, ) and hypericum (Namli et al ., ).…”

Section: Discussionmentioning

confidence: 97%

Effects of UV‐B on vitamin C, phenolics, flavonoids and their related enzyme activities in mung bean sprouts (Vigna radiata)

Wang

Gui

Xue

et al. 2017

Int J of Food Sci Tech

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In this study, ultraviolet‐B radiation (UV‐B) was used to effect the accumulation of vitamin C, phenolics and flavonoids in mung bean sprouts. Results indicate that the content of vitamin C and flavonoids increased during the initial period, and after a brief decline, reached peak levels of 25.29 ± 1.02 mg/100 g FW and 726.67 ± 7.35 mg/100 g DW, respectively, at 2.5 h (1.845 kJ m−2), while the peak levels of the phenolics were 10741.33 ± 68.04 mg/100 g DW. The thiobarbituric acid reactive substances (TBARS) content decreases with the increase in irradiation time. The activities of the related enzymes, including phenylalanine ammonia‐lyase (PAL), L‐galactono‐1, 4‐lactone dehydrogenase (GalLDH), peroxidase (POD), polyphenol oxidase (PPO) and chalcone isomerase (CHI) were determined, which showed strong correlations with the change in the content of vitamin C, phenolics and flavonoids. In conclusion, the accumulation of vitamin C, phenolics and flavonoids in mung bean sprouts can be promoted by a low‐dose UV‐B irradiation.

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Section: Discussionmentioning

confidence: 97%

Effects of UV‐B on vitamin C, phenolics, flavonoids and their related enzyme activities in mung bean sprouts (Vigna radiata)

Wang

Gui

Xue

et al. 2017

Int J of Food Sci Tech

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“…The biosynthesis of flavonoid and the expression levels of related genes are regulated by phytochrome, cryptochrome, phototropin, and UV-B photoreceptors [43,44]. For example, flavonoid biosynthesis was suppressed by increasing the amount of far-red light of phytochrom [45], whereas UV-A / blue light induction of the flavonoids biosynthesis was mediated principally by cryptochrome [44], in addition, the biosynthesis of flavonoids and the expression levels of related genes are induced most effectively by UV-B light [46,47]. In fact, a white light source that contains all these wavelengths is usually used to induce flavonoid biosynthesis.…”

Section: Discussionmentioning

confidence: 95%

Effects of light on in vitro fiber development and flavonoid biosynthesis in green cotton (Gossypium hirsutum)

et al. 2016

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As an environmental factor, light influences the physiological functions and secondary metabolism of plants. However, the role of light in cotton fiber development and pigment biosynthesis has not yet been thoroughly explored. In this study, ovules of green cotton were cultured in vitro under dark and light conditions, and fiber and ovule growth parameters as well as fiber carbohydrate and cellulose contents and the expression of genes related to fiber development were investigated to elucidate the effect of light on fiber development. In addition, to investigate the effect of light on fiber pigment biosynthesis, the fiber flavonoid content and related gene expression were determined. The results demonstrated that the fiber length and the expression levels of fiber elongation genes under light culture were significantly lower than under dark culture, however, the ovule and fiber weight were significantly higher than under dark culture. The fiber developed under light culture had higher carbohydrate concentrations and carbohydrate transformation rate than under dark culture. Additionally, light culture exhibited higher cellulose contents and expression levels of cellulose biosynthesis genes compared with dark culture. In contrast, the pattern of the effect of light on flavonoid biosynthesis differed from that for cellulose biosynthesis. At 10 DAC (days after culture) and 20 DAC, the flavonoid contents and the expression levels of genes related to flavonoid biosynthesis were lower than under dark culture. However, the flavonoid contents and gene expression levels observed at 30 DAC and 40 DAC were higher in the light culture than in the dark culture. These results suggested that light hindered fiber elongation, but promoted carbohydrate accumulation and carbohydrate transformation, which resulted in fiber weight gain and increased cellulose accumulation in fibers. In addition, light inhibited flavonoid biosynthesis at early stage of fiber development, but promoted it at later stages. These findings provide the basis for intensive study of fiber development and flavonoids biosynthesis in green cotton.

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“…Thus, Agati et al ( 2013 ) concluded that UV-B photoprotection is just one of the essential functions of fl avonoids which have several other myriad roles in plant growth regulation. Namli et al ( 2014 ) observed an increase in the total fl avonoids, phenolics , and hypericin content in the in vitro cultures of Hypericum retusum var. During such stress, there is a burst in reactive oxygen species (ROS) production, resulting in various damages which we have discussed before.…”

Section: Flavonoidsmentioning

confidence: 87%

“…However, the most important functions of fl avonoids arise when the plants face UV-B stress. When the cultured plantlets were exposed to UV-B rays for 15, 30, 45, and 60 min, the highest total phenolics, fl avonoids, and hypericin accumulation (43.17 ± 0.8; 35.09 ± 0.8; 2.7 ± 0.05 mg g −1 , respectively) was achieved at 45 min of UV-B exposure, whereas the contents of these metabolites in the naturally grown plants were 23.33 ± 0.9, 18.62 ± 0.3, and 1.6 ± 0.01 mg g −1 respectively (Namli et al 2014 ). Koyama et al ( 2012 ) reported a decrease in the fl avonol content in the skin of grape berries (under UV shield).…”

Section: Flavonoidsmentioning

confidence: 98%

Plant Hormones under Challenging Environmental Factors

Ahammed¹,

Yu²

2016

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Effects of UV-B radiation on total phenolic, flavonoid and hypericin contents inHypericum retusumAucher grown underin vitroconditions

Cited by 19 publications

References 24 publications

Effects of UV‐B on vitamin C, phenolics, flavonoids and their related enzyme activities in mung bean sprouts (Vigna radiata)

Effects of UV‐B on vitamin C, phenolics, flavonoids and their related enzyme activities in mung bean sprouts (Vigna radiata)

Effects of light on in vitro fiber development and flavonoid biosynthesis in green cotton (Gossypium hirsutum)

Plant Hormones under Challenging Environmental Factors

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