Nontargeted Analysis Using Ultraperformance Liquid Chromatography–Quadrupole Time-of-Flight Mass Spectrometry Uncovers the Effects of Harvest Season on the Metabolites and Taste Quality of Tea (Camellia sinensis L.)

Journal of Agricultural and Food Chemistry, Journal Year: 2015, Volume and Issue: 63(44), P. 9869 - 9878

Published: Oct. 23, 2015

The chemical composition and taste quality of tea fluctuate seasonally. However, the compounds responsible for seasonal variation metabolic pattern are far from clear. This study compared metabolite profiles green teas nine varieties that were plucked in spring, summer, autumn by using ultraperformance liquid chromatography–quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF/MS) on a reversed phase column. A multivariate analysis indicated distinct differences among phenotypes harvested different seasons. Heat-map pathway demonstrated flavan-3-ols, theasinensins, procyanidins, quercetin-O-glycosides, apigenin-C-glycosides, amino acids exhibited sharp fluctuations. An equivalent quantification tastes showed summer teas, bitterness astringency significantly elevated, whereas umami declined. Metabolite content comparisons partial least-squares suggested several flavonoids mainly variations quality.

Language: Английский

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Flavonoids and Phenolic Acids from Oregano: Occurrence, Biological Activity and Health Benefits

Plants, Journal Year: 2017, Volume and Issue: 7(1), P. 2 - 2

Published: Dec. 26, 2017

Several herb species classified as oregano have been widely used in folk medicine to alleviate inflammation-related diseases, respiratory and digestive disorders, headaches, rheumatism, diabetes others. These potential health benefits are partially attributed the phytochemical compounds such flavonoids (FL) phenolic acids (PA). Flavonoids among most abundant studied phytochemicals species. Epidemiological, vitro vivo experiments related long-term consumption of dietary FL PA with a decreased risk incidence chronic diseases. The aim this manuscript is summarize latest studies on identification distribution from their antioxidant, anti-inflammatory anti-cancer benefits.

Language: Английский

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Benefits of Condensed Tannins in Forage Legumes Fed to Ruminants: Importance of Structure, Concentration, and Diet Composition

Crop Science, Journal Year: 2018, Volume and Issue: 59(3), P. 861 - 885

Published: Nov. 29, 2018

Condensed tannins (CTs) account for up to 20% of the dry matter in forage legumes used as ruminant feeds. Beneficial animal responses CTs have included improved growth, milk and wool production, fertility, reduced methane emissions ammonia volatilization from dung or urine. Most important is ability such forages combat effects gastrointestinal parasitic nematodes. Inconsistent were initially attributed concentration diet, but recent research has highlighted importance their molecular structures, well concentration, also composition diet containing CTs. The CT structural traits cannot be underestimated. Interdisciplinary key unraveling relationships between bioactivities will enable future on‐farm exploitation these natural plant compounds. Research needed provide breeders with guidelines screening tools optimize traits, both whole diet. In addition, improvements are competitiveness agronomic CT‐containing our understanding options inclusion diets. Farmers need varieties that competitive mixed swards predictable bioactivities. This review covers results multidisciplinary on sainfoin ( Onobrychis Mill. spp.) provides an overview current developments several other tanniniferous forages. Tannin chemistry now being linked agronomy, breeding, nutrition, parasitology. past decade yielded considerable progress generated more questions—an enviable consequence new knowledge!

Language: Английский

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The Multifunctional Roles of Polyphenols in Plant-Herbivore Interactions

International Journal of Molecular Sciences, Journal Year: 2021, Volume and Issue: 22(3), P. 1442 - 1442

Published: Feb. 1, 2021

There is no argument to the fact that insect herbivores cause significant losses plant productivity in both natural and agricultural ecosystems. To counter this continuous onslaught, plants have evolved a suite of direct indirect, constitutive induced, chemical physical defenses, secondary metabolites are key group facilitates these defenses. Polyphenols-widely distributed flowering plants-are major such biologically active metabolites. Recent advances analytical chemistry metabolomics provided an opportunity dig deep into extraction quantification plant-based products with insecticidal/insect deterrent activity, potential sustainable pest management strategy. However, we currently lack updated review their multifunctional roles insect-plant interactions, especially focusing on or antifeedant properties. This focuses role polyphenols plant-insect interactions defenses including structure, induction, regulation, anti-feeding toxicity effects. Details mechanisms underlying localization compounds discussed context current findings, avenues for future research area.

Language: Английский

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Amino acids – A life between metabolism and signaling

Plant Science, Journal Year: 2014, Volume and Issue: 229, P. 225 - 237

Published: Sept. 26, 2014

Language: Английский

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