Analysis of saponin composition and comparison of the antioxidant activity of various parts of the quinoa plant (<i>Chenopodium quinoa</i> Willd.)

Lim, Jeong Gyu; Park, Hyun‐Mee; Yoon, Ki Sun

doi:10.1002/fsn3.1358

Cited by 87 publications

(70 citation statements)

References 29 publications

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“…The effect of soaking, dehulling and germinating was also investigated, and a lower TPC was found in soaked and dehulled seeds, while an almost three-fold increase in TPC occurred in germinated seeds. The lowest TPC value (14.37 mg GAE 100 g −1 dm) among quinoa seeds from Asia was found in quinoa samples grown in Korea (Table 2) [20].…”

Section: Quantitation Of Phenolic Compounds By Spectrophotometric Assaysmentioning

confidence: 92%

“…As for quinoa grown in Asian countries, it was not possible to define a range for flavonoid content, as different flavonoids were used as standards for the calibration. Lim et al reported 45.88 mg Rutin Equivalent (RE) 100 g −1 dm for TFC in seeds from Korean crops (Table 2) [20]. Both free and bound flavonoids were reported for samples from China (Table 2) [16,18], but these values are not comparable since rutin and quercetin were used as standards for the calibration.…”

Section: Quantitation Of Phenolic Compounds By Spectrophotometric Assaysmentioning

confidence: 99%

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Functional Components and Anti-Nutritional Factors in Gluten-Free Grains: A Focus on Quinoa Seeds

Melini¹,

Melini²

2021

Foods

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Quinoa (Chenopodium quinoa Willd.) has recently received increasing interest from both scientists and consumers due to its suitability in gluten-free diets, its sustainability, and its claimed superfood qualities. The aim of this paper is to systematically review up-to-date studies on quinoa functional components and anti-nutritional factors, in order to define a baseline for food scientists approaching the investigation of quinoa phytochemicals and providing evidence for the identification of healthier sustainable foods. State of the art evaluations of phytochemical contents in quinoa seeds were obtained. It emerged that phenolic compounds are the most investigated functional components, and spectrophotometric methods have been mostly applied, despite the fact that they do not provide information about single components. Saponins are the most studied among anti-nutritional factors. Betalains, tannins, and phytoecdysteroids have been poorly explored. Information on factors affecting the phytochemical content at harvesting, such as quinoa ecotypes, crop geographical location and growing conditions, are not always available. A comprehensive characterization, encompassing several classes of functional components and anti-nutritional factors, is mainly available for quinoa varieties from South America. However, defining a standard of quality for quinoa seeds is still challenging and requires a harmonization of the analytical approaches, among others.

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Section: Quantitation Of Phenolic Compounds By Spectrophotometric Assaysmentioning

confidence: 92%

Section: Quantitation Of Phenolic Compounds By Spectrophotometric Assaysmentioning

confidence: 99%

Functional Components and Anti-Nutritional Factors in Gluten-Free Grains: A Focus on Quinoa Seeds

Melini¹,

Melini²

2021

Foods

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“…Quinoa contains abundant bioactive substances including saponins, polyphenols and avonoids (Alvarez-Jubete et al 2010). These secondary metabolites accumulate richly in roots (Lim et al 2020). In our research, transgenic hairy roots produced betacyanins due to the expression of the genes from pX11, which will be ideal approach for commercially production of nutritious betacyanins from quinoa hairy roots.…”

Section: Discussionmentioning

confidence: 94%

The Establishment of Two Efficient Transformation Systems in Quinoa

Wang

Zhang

Dai

et al. 2021

Preprint

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Quinoa (Chenopodium quinoa Willd.) provides a gluten-free food with abundant nutrition and is potential to become a major crop in future. Quinoa has a lot of unique features including the high tolerance to multiple stresses, of which the underlying mechanisms may help improve other crops. Genetic manipulation will provide powerful tools to investigate the function of key genes in regulation of quinoa development and stress responses, which will further improve quinoa planting in the fields. However, the efficient transformation system for quinoa has not been well developed yet. Here, we established two rapid and efficient transformation systems for quinoa by using hairy root and leaf agroinfiltration, which provide useful tools for quick analyses of genes function in quinoa. Hairy roots were obtained from three types of explants, including cotyledon-nod with hypocotyl, cotyledon itself, and hypocotyl pieces. Interestingly, explants of cotyledon-nod with hypocotyl showed the highest transformation efficiency at 67.9%, and cotyledon displayed medium efficiency at 42.2%, while hypocotyl with the lowest at 31.6%. We also obtained transgenic quinoa roots successfully in-vivo, which showed low efficiency, but this provides a potential method to test gene function in live plants. By using young leaves for agroinfiltration, direct injection showed a better transgenic effect compared with vacuum penetration. Overall, the transformation systems using both hairy root and leaf agroinfiltration provide efficient and convenient ways to manipulate and analyse gene functions in quinoa.

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“…The content of total phenolic compounds in extracts was determined by the coloration method (Lim et al., 2020; Xie et al., 2019). 1.0 ml of DRE was mixed with 1 ml of foline‐phenol solvent.…”

Section: Methodsmentioning

confidence: 99%

“…The content of total phenolic compounds in extracts was determined by the coloration method (Lim et al, 2020;Xie et al, 2019).…”

Section: Quantitative Analyses Of Biologically Active Compounds In Drementioning

confidence: 99%

Hypoglycemic effect of Taraxacum officinale root extract and its synergism with Radix Astragali extract

Chai

Guo

et al. 2021

Food Science & Nutrition

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Taraxacum officinale (dandelion) and Radix Astragali are traditional medicinal and edible plants with high nutritional value. In this study, the synergistic hypoglycemic effect of DRE and Radix Astragali extract (RAE) was evaluated. Our results showed that water extract of dandelion (DRE‐w), mainly containing polysaccharides (63.92 ± 1.82 mg/g), total flavonoid (2.57 ± 0.06 mg/g), total phenolic compounds (8.93 ± 0.34 mg/g), and saponins (0.54 ± 0.05 mg/g), exhibited significantly inhibitory effect on α‐glucosidase and α‐amylase. DRE‐w and RAE had synergistic hypoglycemic effect; we found that DRE‐w and its combination with RAE could relieve the state of insulin resistance in IR‐HepG2 cells. The combination could more significantly increase the glucose consumption and intracellular glycogen content, and improve the activity of hexokinase and pyruvate kinase in IR‐HepG2 cells. In summary, DRE and its combination with RAE can be developed as the drugs or functional foods for diabetes prevention and treatment.

show abstract

Analysis of saponin composition and comparison of the antioxidant activity of various parts of the quinoa plant (Chenopodium quinoa Willd.)

Cited by 87 publications

References 29 publications

Functional Components and Anti-Nutritional Factors in Gluten-Free Grains: A Focus on Quinoa Seeds

Functional Components and Anti-Nutritional Factors in Gluten-Free Grains: A Focus on Quinoa Seeds

The Establishment of Two Efficient Transformation Systems in Quinoa

Hypoglycemic effect of Taraxacum officinale root extract and its synergism with Radix Astragali extract

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