Defence strategies adopted by the medicinal plant Coleus forskohlii against supplemental ultraviolet-B radiation: Augmentation of secondary metabolites and antioxidants

Takshak, Swabha; Agrawal, Shashi Bhushan

doi:10.1016/j.plaphy.2015.09.018

Cited by 77 publications

(49 citation statements)

References 56 publications

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“…At 75 DAG, minimum increase in MDA was observed due to eUV‐B which could be because of higher inductions of antioxidative enzymes such as APX, CAT, and SOD involved in detoxification of ROS. The results of this study are in agreement to other findings obtained in Linum usitatissimum , Helianthus annuus , Withania somnifera, and Coleus forskohlii . Disturbance in membrane integrity could be an important reason for the decline of various pigments.…”

Section: Discussionsupporting

confidence: 92%

“…Ingestion of tannins can have strong negative effects on herbivorous insects, for example, a reduced efficiency in nutrient absorption (44) thus plant loses its forage quality (45). Another metabolite, ascorbic acid which is a nonenzymatic antioxidant, also showed slight increment under elevated exposure at all the three growth stages to mitigate the harmful free radicals, although lower percent increase was found which could be due to higher increase in APX activity, as it utilizes ascorbic acid as substrate (40,46).…”

Section: Discussionmentioning

confidence: 99%

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Heteropogon contortus BL‐1 (Pilli Grass) and Elevated UV‐B Radiation: The Role of Growth, Physiological, and Biochemical Traits in Determining Forage Productivity and Quality

Hamid

Singh

Agrawal

et al. 2018

Photochem & Photobiology

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Exposure to elevated UV-B (eUV-B) is well known for its phytotoxicity, although studies made with UV-B exposure and its impact on grasses are limited especially from tropical countries including India. In this study, responses of a valuable grass species, Heteropogon contortus BL-1, were assessed under eUV-B (over ambient UV-B) at different growth stages. Damage caused by eUV-B was observed in the form of membrane damage and loss of pigments at early stages of growth, whereas tannin, phenol, and protein contents showed their increments at all the growth stages, to overcome the imposed stress. Reducing sugar showed its decline at all the growth stages, whereas starch and sucrose contents were higher mostly at later ages of plant growth. eUV-B caused a marked variations in anatomical structures with increase of mesophyll and spongy parenchymatous cells in leaves to reduce severity of irradiation, to maintain the growth and productivity. The study also highlights the significant negative influence of eUV-B on the growth of H. contortus BL-1 and its adaptive strategy to minimize the negative impacts. With the progression of age, plants although adopted to UV-B stress with maintenance of productivity, but palatability of forage was affected due to increment of tannin content.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Heteropogon contortus BL‐1 (Pilli Grass) and Elevated UV‐B Radiation: The Role of Growth, Physiological, and Biochemical Traits in Determining Forage Productivity and Quality

Hamid

Singh

Agrawal

et al. 2018

Photochem & Photobiology

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“…Following this initial incubation, 1 ml of 8.5 m m sulphanilamide and 1 ml of 3 m m α‐naphthylamine were added to the solution, which was then maintained at 25°C in darkness for 60 min. The absorbance of the solution was measured at 530 nm, and the O 2 .− content was calculated based on a graph prepared using potassium nitrite (KNO 2 ) as a standard (Takshak & Agrawal, ). Meanwhile, H 2 O 2 contents were measured according to the method of Su et al.…”

Section: Methodsmentioning

confidence: 99%

“…The absorbance of the solution was measured at 530 nm, and the O 2 . − content was calculated based on a graph prepared using potassium nitrite (KNO 2 ) as a standard (Takshak & Agrawal, 2015).…”

Section: Analysis Of Reactive Oxygen Speciesmentioning

confidence: 99%

The phenylpropanoid pathway affects apple fruit resistance to Botrytis cinerea

Liu

et al. 2017

Journal of Phytopathology

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Apple fruits are rich in phenolic compounds that may enhance resistance to grey mould disease caused by Botrytis cinerea. Using Malus domestica Borkh. cultivars Fuji and Qinguan, we analysed the contents of total phenols, total flavonoids, eight individual phenolic compounds, H2O2 and O2.− as well as the activities of key enzymes in the phenylpropanoid pathway in the flesh of control and B. cinerea‐inoculated fruits. Chlorogenic acid contents increased for a short period in the less susceptible cultivar Qinguan fruits, but decreased in the disease‐susceptible Fuji fruits. Additionally, ferulic acid production was induced in both cultivars in response to B. cinerea. Furthermore, the activities of phenylalanine ammonia lyase, cinnamate 4‐hydroxylase, 4‐coumarate:coenzyme A ligase and cinnamyl alcohol dehydrogenase were differentially induced between the two apple cultivars. Remarkably, the contents of H2O2 and O2.− as well as the activities of enzymes in phenolic metabolism tested in this study were always higher in Qinguan fruits than in Fuji fruits. Our data imply that phenylpropanoid metabolism is closely associated with apple fruit resistance to grey mould disease. These findings may be useful for characterizing the mechanism(s) underlying plant resistance to B. cinerea, with potential implications for the screening of grey mould disease‐resistant apple varieties in breeding programmes.

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“…Tocopherols are the major lipid-soluble antioxidant in the cell antioxidant defence system, nonetheless, the human body is not able to synthesize these substances using its own metabolic pathways, therefore it has to be obtained from the diet (Sýs, Švecová, Švancara, & Metelka, 2017). Tocopherols function as a chain-breaking antioxidant, inhibiting the propagation of lipid peroxidation, preventing lipoproteins and cell membranes from oxidative damage by acting as singlet oxygen quencher and stabilizing chloroplast membranes (Takshak & Agrawal, 2015). Although OS has the highest content in total tocopherols, the amount present in 100 g of fruit only represents around 1% of the Reference Daily Intake (NIH, 2017).…”

Section: Hydrophilic and Lipophilic Compoundsmentioning

confidence: 99%

Extensive profiling of three varieties of Opuntia spp. fruit for innovative food ingredients

Melgar

Pereira

Oliveira

et al. 2017

Food Research International

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A B S T R A C TConsumer interest in the use of natural ingredients is creating a growing trend in the food industry, leading to research into the development of natural products such as colorants, antimicrobials and antioxidant compounds. This work involves an extensive morphological (using physico-chemical assays), chemical (antioxidant activity assays) and microbiological (Gram-positive and negative strains) characterization of prickly peras (Opuntia ficusindica (OFI) var. sanguigna, gialla and Opuntia engelmannii) fruits. Through chromatographic assays, these species have shown interesting contents of hydrophilic (sugars, organic acids and betalains) and lipophilic (tocopherols and fatty acids) compounds. While Opuntia engelmannii exhibited higher content of betacyanins and mucilage, OFI varieties sanguigna and gialla displayed greater organic acid content. The sanguigna variety also showed the highest α-tocopherol content. All this compounds could be the responsible of enhancing the bioactivity of this variety, which can be observed in its antimicrobial potential, tested in the studied strains too. Results revealed that Opuntia spp. could be used as a nutraceutical and/or food additive, maintaining and promoting health and life quality.

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Defence strategies adopted by the medicinal plant Coleus forskohlii against supplemental ultraviolet-B radiation: Augmentation of secondary metabolites and antioxidants

Cited by 77 publications

References 56 publications

Heteropogon contortus BL‐1 (Pilli Grass) and Elevated UV‐B Radiation: The Role of Growth, Physiological, and Biochemical Traits in Determining Forage Productivity and Quality

Heteropogon contortus BL‐1 (Pilli Grass) and Elevated UV‐B Radiation: The Role of Growth, Physiological, and Biochemical Traits in Determining Forage Productivity and Quality

The phenylpropanoid pathway affects apple fruit resistance to Botrytis cinerea

Extensive profiling of three varieties of Opuntia spp. fruit for innovative food ingredients

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