flavonoid


flavonoid
flavonoid [flā′və noid΄]
n.
any of a large group of aromatic compounds occurring naturally, chiefly as pigments in higher plants, as anthocyanin

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fla·vo·noid (flāʹvə-noid') n.
Any of a large group of plant substances that includes the anthocyanins.

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Organic compound, any member of a class of biological pigments containing no nitrogen that are found in many plants.

They include anthoxanthins, which give yellow colours, often to flower petals, and anthocyanins, largely responsible for the red colouring of buds and young shoots and the purple and purple-red colours of autumn leaves. Their biological function is unknown; they may attract pollinators and seed dispersers.

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also called  flavone 

      any of a class of nonnitrogenous biological pigments (biochromes) that includes the anthocyanins and the anthoxanthins. Extensively represented in plants, the flavonoids are of relatively minor and limited occurrence in animals, which derive the pigments from plants. Many members of this group, notably the anthoxanthins, impart yellow colours, often to the petals of flowers. The anthocyanins are largely responsible for the red colouring of buds and young shoots as well as for the purple and purple-red colours of autumn leaves. Although no physiological functions have been definitely established for the flavonoids, it has been suggested that the colour they impart to flowers may be an important factor in attracting bees, butterflies, and other pollen-transporting animals that implement fertilization in plants. Similarly, brightly coloured fruits have improved chances of seed dispersal by animals attracted to them as food.

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Universalium. 2010.

Look at other dictionaries:

  • flavonoid — [flā′və noid΄] n. any of a large group of aromatic compounds occurring naturally, chiefly as pigments in higher plants, as anthocyanin …   English World dictionary

  • Flavonoid — The term flavonoid (or bioflavonoid) refers to a class of plant secondary metabolites. According to the IUPAC nomenclature, [http://www.iupac.org/goldbook/F02424.pdf Flavonoids (isoflavonoids and neoflavonoids).] , IUPAC Compendium of Chemical… …   Wikipedia

  • flavonoid — fla·vo·noid flāv ə .nȯid, flav adj of, relating to, or being a flavonoid flavonoid n any of a group of aromatic compounds that have two substituted benzene rings connected by a chain of three carbon atoms and an oxygen bridge and that include… …   Medical dictionary

  • Flavonoid — Die Flavonoide sind eine Gruppe von wasserlöslichen Pflanzenfarbstoffen und spielen eine wichtige Rolle im Stoffwechsel vieler Pflanzen. Sie gehören zusammen mit den Phenolsäuren zu den Polyphenolen. Laut DGE gibt es über 6500 unterschiedliche… …   Deutsch Wikipedia

  • flavonoid — flavonoidas statusas T sritis chemija apibrėžtis Spalvotas gamtinis flavonui giminingas junginys. atitikmenys: angl. flavonoid rus. флавоноид …   Chemijos terminų aiškinamasis žodynas

  • flavonoid — noun Etymology: flavone + oid Date: 1947 any of a group of oxygen containing aromatic antioxidant compounds that includes many common pigments (as the anthocyanins and flavones) …   New Collegiate Dictionary

  • flavonoid — noun Any of many compounds that are plant metabolites, being formally derived from flavone; they have antioxidant properties …   Wiktionary

  • Flavonoid — Fla|vo|no|id [↑ Flavon (2) u. ↑ oid], das; s, e: Sammelbez. für im Allg. als Glykoside vorliegende Naturstoffe, die in enger struktureller Beziehung zu 2 Phenyl 1 benzopyran u. seinen oxygenierten Derivaten stehen, z. B. Flavone, Anthocyanidine,… …   Universal-Lexikon

  • Flavonoid — Flavono|i̱d [↑Flavon u. ...id] s; [e]s, e (meist Mehrz.): Gruppe von Stoffen, von denen einige eine Wirkung auf die Kapillarwand haben (als Permeabilitätsvitamin oder Vitamin P bezeichnet) …   Das Wörterbuch medizinischer Fachausdrücke

  • flavonoid —   Large range of plant secondary metabolites comprising specific phenolic compounds, usually occurring as glycosides; often colored as in many plant pigments …   Expanded glossary of Cycad terms


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