Combined effects of cations in fertilizer solution on antioxidant content in red lettuce (<scp><i>Lactuca sativa</i></scp> L.)

Sawatdee, Sopanat; Prommuak, Chattip; Jarunglumlert, Teeraya; Pavasant, Prasert; Flood, Adrian E.

doi:10.1002/jsfa.11106

Cited by 6 publications

(6 citation statements)

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“…Biomass production is a critical characteristic of plant production and is also an indicator of plant health [3]. At harvest time (60 DAS), the leaf and root fresh matter production and the number of leaves were negatively affected by the increasing salinity concentrations in the hydroponic solution (Figures 1 and 2).…”

Section: Resultsmentioning

confidence: 99%

“…These beneficial effects are believed to be due to the presence of phytochemical compounds, defined as bioactive compounds, including polyphenols, carotenoids and vitamins, among others [2]. Since the overproduction of free radicals formed through cell metabolism are involved in the pathogenesis of numerous chronic diseases [3], the protective role of phytochemicals is associated with their antioxidant activity, mainly through their inhibition of the oxidative damage caused by reactive oxygen species (ROS) and reactive nitrogen species (RNS) [4].…”

Section: Introductionmentioning

confidence: 99%

“…Lettuce (Lactuca sativa L.) is a plant species representative of the Asteraceae family. It is an important leafy agricultural product and one of the most popular vegetables worldwide; it is currently consumed in increasing amounts due to its perception as a healthy food [3]. The consumption of lettuce provides an important source of different nutritionally valuable antioxidant substances, such as phenolic compounds (flavonoids and phenolic acids), vitamin C, and fiber contents [5].…”

Section: Introductionmentioning

confidence: 99%

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Salinity Eustress Increases the Biosynthesis and Accumulation of Phenolic Compounds That Improve the Functional and Antioxidant Quality of Red Lettuce

et al. 2022

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The application of different techniques of positive stress (eustress), such as mild and moderate saline stress, could enhance the nutritional and functional attributes of food vegetables. The present study aimed to evaluate the positive effect of salinity as a eustressor on the functional quality of red lettuce growing under hydroponic conditions and subjected to increasing salinity. Red lettuce plants were grown for 60 days and, 45 days after sowing, were subjected to different levels of salinity (0, 50, 100, 150, and 200 mM NaCl). The phenolic compound concentration and antioxidant activity were measured at 7 and 15 days after the application of salinity treatment. Moreover, at harvest, the root and shoot biomass and efficiency of photosystem II were evaluated. Our results showed that the highest phenolic concentration and antioxidant activity were obtained through moderate salt stress (50 mM NaCl) applied for 15 days without affecting the photosynthetic activity and biomass production of lettuce plants. By contrast, when severe salt stress levels (150–200 mM NaCl) were applied, an increase in phenolic compounds was also obtained, but concomitantly with a significant reduction in antioxidant activity and biomass production. The application of moderate stress in red lettuce suggests its potential use as a tool to increase the biosynthesis and accumulation of bioactive secondary metabolites, improving the nutritional characteristics of red lettuce.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Salinity Eustress Increases the Biosynthesis and Accumulation of Phenolic Compounds That Improve the Functional and Antioxidant Quality of Red Lettuce

et al. 2022

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“…2014 ). Changes in mineral element content in different areas also affect the nutritional quality and antioxidant activity of lettuce ( Sawatdee et al . 2021 ).…”

Section: Resultsmentioning

confidence: 99%

Phytochemicals and Antioxidant Activities of Red Oak, Red Coral and Butterhead

Jiangseubchatveera

Saechan

Petchsomrit

et al. 2023

tlsr

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Lactuca sativa L. is an economically important vegetable that contains numerous phytochemicals. This study aimed to determine the phytochemicals in three lettuce cultivars (red oak, red coral, and butterhead) and assess their total phenolics, total flavonoids, and antioxidant activities. The dried leaves of each lettuce cultivar were macerated with hexane, ethyl acetate (EtOAc), and 95% ethanol (EtOH). Total phenolics, total flavonoids and antioxidant activities from the three solvent extracts were measured. The phytochemical screening showed that the leaves from the three lettuce cultivars contained flavonoids, hydrolyzable tannins, coumarins, steroids, and phenolic compounds. While the EtOAc fraction of the red coral lettuce showed the highest total phenolic content (9.747 ± 0.021 mg gallic acid equivalent/g) and the hexane fraction of the butterhead lettuce contained the highest flavonoids (7.065 ± 0.005 mg quercetin equivalent/g). In the DPPH (2,2-diphenyl-1-picryl-hydrazyl-hydrate) assay, the EtOAc fraction of the red coral lettuce had the highest antioxidant capacity with an IC50 of 0.277 ± 0.006 mg/mL, whereas, in the ABTS (2,2’-azino-bis(3- ethylbenzothiazoline-6-sulfonic acid)) assay, the 95% EtOH of the red coral lettuce had the highest antioxidant capacity with an IC50 of 0.300 ± 0.002 mg/mL. All three lettuce cultivars contained high levels of phenolic content and flavonoids, which are the source of antioxidant activities. These lettuce cultivars, especially the red coral lettuce, are a potential source of natural antioxidants. Further research on the application of natural antioxidants is required to investigate the therapeutic or the neutraceutical implication of the lettuce cultivars.

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“…8 b). A modified Huett’s nutrient solution (pH 6.8 and EC 1152 µS⋅cm -1 ) [ 83 ] comprising of (mM) nitrogen (N) 8.29, potassium (K) 2.56, calcium (Ca) 1.75, magnesium (Mg) 0.41, phosphorus (P) 0.71, sulfur (S) 0.81, iron (Fe) 0.045, manganese (Mn) 0.004, boron (B) 0.019, zinc (Zn) 0.0023, copper (Cu) 0.00047, and molybdenum (Mo) 0.0001 was applied and adjusted once a week. An experimental room containing four different light treatments was maintained at 22-25 °C throughout the experiment using air conditioners.…”

Section: Methodsmentioning

confidence: 99%

Effect of mixed light emitting diode spectrum on antioxidants content and antioxidant activity of red lettuce grown in a closed soilless system

Sawatdee

Jarunglumlert

Pavasant³

et al. 2023

BMC Plant Biol

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Background Light spectra have been demonstrated to result in different levels of comfort or stress, which affect plant growth and the availability of health-promoting compounds in ways that sometimes contradict one another. To determine the optimal light conditions, it is necessary to weigh the vegetable’s mass against the amount of nutrients it contains, as vegetables tend to grow poorly in environments where nutrient synthesis is optimal. This study investigates the effects of varying light conditions on the growth of red lettuce and its occurring nutrients in terms of productivities, which were determined by multiplying the total weight of the harvested vegetables by their nutrient content, particularly phenolics. Three different light-emitting diode (LED) spectral mixes, including blue, green, and red, which were all supplemented by white, denoted as BW, GW, and RW, respectively, as well as the standard white as the control, were equipped in grow tents with soilless cultivation systems for such purposes. Results Results demonstrated that the biomass and fiber content did not differ substantially across treatments. This could be due to the use of a modest amount of broad-spectrum white LEDs, which could help retain the lettuce’s core qualities. However, the concentrations of total phenolics and antioxidant capacity in lettuce grown with the BW treatment were the highest (1.3 and 1.4-fold higher than those obtained from the control, respectively), with chlorogenic acid accumulation (8.4 ± 1.5 mg g− 1 DW) being particularly notable. Meanwhile, the study observed a high glutathione reductase (GR) activity in the plant achieved from the RW treatment, which in this study was deemed the poorest treatment in terms of phenolics accumulation. Conclusion In this study, the BW treatment provided the most efficient mixed light spectrum to stimulate phenolics productivity in red lettuce without a significant detrimental effect on other key properties.

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Combined effects of cations in fertilizer solution on antioxidant content in red lettuce (Lactuca sativa L.)

Cited by 6 publications

References 81 publications

Salinity Eustress Increases the Biosynthesis and Accumulation of Phenolic Compounds That Improve the Functional and Antioxidant Quality of Red Lettuce

Salinity Eustress Increases the Biosynthesis and Accumulation of Phenolic Compounds That Improve the Functional and Antioxidant Quality of Red Lettuce

Phytochemicals and Antioxidant Activities of Red Oak, Red Coral and Butterhead

Effect of mixed light emitting diode spectrum on antioxidants content and antioxidant activity of red lettuce grown in a closed soilless system

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