Mild water deficit increases the contents of bioactive compounds in dropwort

Lee, Ji-Yoon; Oh, Myung‐Min

doi:10.1007/s13580-017-0007-6

Cited by 8 publications

(8 citation statements)

References 35 publications

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“…These factors, in combination, increase crop profit margins coupled with water-saving and can only lead to further mitigation of environmental degradation and sustainable business practices.According toMcKiernan et al (2017) juvenile Eucalyptus globulus can tolerate periods of continuous yet moderate water availability with little impact on concentrations of secondary plant metabolites. On the other hand, increasing water deficits resulted in a decrease in polyphenolic content in S. namaensis, which contrasts with the results recorded byLee and Oh (2017) in their study on the effects of water deficits on the contents of bioactive compounds in Dropwort; the total phenolic contents of all the water deficit treatments increased significantly compared to the controls. A study byGiamperi et al (2012) compared the total content of polyphenolic compounds in eight Salvia spp.…”

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confidence: 99%

Effect of water deficits on the growth and secondary metabolites of Salvia dolomitica Codd. and Salvia namaensis Schinz

Roos

Nchu

2021

Journal of Medicinal Plants for Economic Development

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Background: Salvia dolomitica Codd. and Salvia namaensis Schinz. are indigenous to southern Africa and are used as medicinal plants in folk medicine.Aim: This study aimed to assess the effects of different levels of water deficit treatments on the growth, concentration of secondary metabolites, and anti-Fusarium oxysporum activity of S. dolomitica and S. namaensis.Setting: Experiments were carried out on the Bellville campus of the Cape Peninsula University of Technology, Cape Town.Methods: Four weeks old seedlings of the two species were subjected to 3-, 6-, 9- and 12-day water deficit regimes. Secondary metabolites such as polyphenols, alkaloids, and flavanols were assessed using spectroscopic methods. The anti-fungal activities of crude extracts obtained from plants were evaluated in a micro-dilution bioassay.Results: In all treatments, the plant height, crown width, number of stems and leaves, and fresh and dry weights reduced with increased water deficits. Acetone extracts from all treatments showed anti-fungal activity. However, extracts from the treatment with moderate water deficit (6-day watering interval) recorded significantly (P 0.01) better inhibition of F. oxysporum at the 18 h post incubation than the commercial fungicide, Mancozeb.Conclusion: This research has revealed that mild to moderate water deficit level favours the accumulation of alkaloids in S. dolomitica. Meanwhile, mild to severe water deficit significantly lowered flavanol content in S. namaensis. There was a correlation between the increase in total alkaloid contents and the enhanced anti-fungal activity of extracts of S. dolomitica. The present findings pave the way for optimised cultivation of medicinal plants and development of bioactive natural products.

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confidence: 99%

Effect of water deficits on the growth and secondary metabolites of Salvia dolomitica Codd. and Salvia namaensis Schinz

Roos

Nchu

2021

Journal of Medicinal Plants for Economic Development

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“…Anthocyanins biosynthesis was induced in water-deficient angiosperm evergreen species and dropwort. 22,34 Wheatgrass showed higher phenolics, flavonoids, and vitamin C contents than barley grass did, but not for anthocyanins content.…”

Section: Biochemical Compounds In Barley Grass and Wheatgrass Extractsmentioning

confidence: 89%

“…Drought conditions significantly disrupted the height, weight, and yield of barley grass and wheatgrass. Moreover, drought stress reduces the growth of dropwort 22 and ornamental plants. 10 Wheatgrass showed higher height, weight, and estimated yield than barley grass did, which is likely due to high drought tolerance and crop variation.…”

Section: Growth Parametersmentioning

confidence: 99%

“…9 Drought stress may stimulate the accumulation of biochemical compounds during the germination and initial growth stages of barley grass and wheatgrass by activating the phenylpropanoid pathway and may improve ROS scavenging. Severe drought stress increases the level of phenolics content and flavonoids in rice leaves, buckwheat, dropwort, oleander leaves, and Achillea species, 11,12,22,26 which can scavenge free radicals as well. 30 The vitamin C content was higher in the drought-stressed condition than in control in both barley grass and wheatgrass extracts.…”

Section: Biochemical Compounds In Barley Grass and Wheatgrass Extractsmentioning

confidence: 99%

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Assessment of biochemical compounds and antioxidant enzyme activity in barley and wheatgrass under water‐deficit condition

et al. 2021

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Wheatgrass and barley grass are freshly sprouted leaves of wheat and barley seeds and are rich sources of phytochemicals. This study was conducted to investigate the effects of drought stress on the biochemical compounds and antioxidant activities of barley grass and wheatgrass extracts. The grass was cultivated in an organic soil growing medium with different levels of drought stress (a control with 100% water holding capacity (WHC), mild drought stress with 75% WHC, moderate drought stress with 50% WHC, and severe drought stress with 25% WHC) in a growth chamber by controlling temperature (20/15 °C, day/ night), light (12/12 h, light/dark; intensity 150 ∼mol m −2 s −1 with quantum dot light-emitting diodes), and relative humidity (60%) for 7 days. The drought stress showed increased levels of biochemical compounds, especially phenolics, flavonoids, and vitamin C, in both barley grass and wheatgrass extracts. The wheatgrass extracts showed 1.38-1.67 times higher phenolics, flavonoids, and vitamin C contents than the barley grass extracts did. The antioxidant (2,2 0 -azino-bis(3-ethylbenzothiazoline-6-sulfonic acid), 2,2-diphenyl-1-picrylhydrazyl radical-scavenging activity, and nitrite-scavenging activity) and antioxidant enzymes (guaiacol peroxidase, catalase, and glutathione reductase) were the highest under severe drought stress in both barley grass and wheatgrass extracts; and the wheatgrass extracts showed 1.20-5.70 times higher antioxidant enzyme activities than the barley grass extracts did. Proper drought-stress treatment of barley grass and wheatgrass may be a convenient and efficient method to increase biochemical compounds and antioxidants in our diet to exploit the related health benefits.

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“…The appropriate limitation of water supply to the root zone can be used as a cultivation technique to produce high-quality crops by promoting the biosynthesis of bioactive compounds without the inhibition of growth. In previous studies, temporary mild water stress did not inhibit the growth of lettuce, water dropwort and tomato, with a simultaneous increase in the content of polyphenolic compounds such as chicoric acid (in lettuce), anthocyanin (in water dropwort) and hydroxycinnamic acid and flavonoids (in tomato), which have antioxidant properties [10][11][12]. In addition, the biosynthesis of secondary metabolites in medicinal plants was also promoted by water deficit stress.…”

Section: Introductionmentioning

confidence: 86%

Determination of Adequate Substrate Water Content for Mass Production of a High Value-Added Medicinal Plant, Crepidiastrum denticulatum (Houtt.) Pak & Kawano

Park

Kim

2020

Agronomy

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The effects of substrate water content on the growth and content of bioactive compounds in Crepidiastrum denticulatum were evaluated. Three-week-old seedlings were subjected to four levels of substrate water content (20%, 30%, 45% and 60%) and maintained for 5 weeks. Growth parameters at 5 weeks of transplanting were significantly higher with the 45% substrate water content treatment than with the other treatments. In addition, photosynthetic rate, stomatal conductance and transpiration rate increased significantly and the highest sap flow rate during the day was observed in 45% substrate water content. Total phenolic content and antioxidant capacity per shoot increased significantly with substrate water content, increasing from 20% to 45% and decreased again at 60%. Antioxidant capacity and total hydroxycinnamic acids (HCAs) content per unit dry weight of plants under the 60% treatment were significantly higher than those under the 45% treatment; however, their content per shoot was the highest under the 45% treatment. Thus, 45% substrate water content is a suitable condition for the growth of C. denticulatum and had positive effects on phenolic content, antioxidant capacity, and HCAs content. These results could be useful for the mass production of high-quality C. denticulatum in greenhouses or plant factories capable of controlling the water content of the root zone.

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Mild water deficit increases the contents of bioactive compounds in dropwort

Cited by 8 publications

References 35 publications

Effect of water deficits on the growth and secondary metabolites of Salvia dolomitica Codd. and Salvia namaensis Schinz

Effect of water deficits on the growth and secondary metabolites of Salvia dolomitica Codd. and Salvia namaensis Schinz

Assessment of biochemical compounds and antioxidant enzyme activity in barley and wheatgrass under water‐deficit condition

Determination of Adequate Substrate Water Content for Mass Production of a High Value-Added Medicinal Plant, Crepidiastrum denticulatum (Houtt.) Pak & Kawano

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