auxin


auxin
auxinic, adj.
/awk"sin/, n. Biochem.
a class of substances that in minute amounts regulate or modify the growth of plants, esp. root formation, bud growth, and fruit and leaf drop.
[1930-35; AUX- + -IN2]

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Any of a group of hormones that regulate plant growth, particularly by stimulating cell elongation in stems and inhibiting it in roots.

Auxins influence the growth of stems toward light (phototropism) and against the force of gravity (geotropism). Auxins also play a role in cell division and differentiation, fruit development, the formation of roots from cuttings, the inhibition of lateral branching, and leaf fall. The most important naturally occurring auxin is beta-indolylacetic acid.

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      any of a group of hormones that regulate plant growth, particularly by stimulating cell elongation in stems and inhibiting it in roots. For example, auxins influence the growth of stems toward light (phototropism) and against the force of gravity (geotropism). Auxins also play a role in cell division and differentiation, in fruit development, in the formation of roots from cuttings, in the inhibition of lateral branching (apical dominance), and in leaf fall (abscission). The most important naturally occurring auxin is beta-indolylacetic acid.

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Universalium. 2010.

Look at other dictionaries:

  • auxin — aux in n. 1. a substance which, in small concentrations, promotes root formation, bud growth, or certain other processes such as fruit ripening or leaf drop in plants. [WordNet 1.5 +PJC] …   The Collaborative International Dictionary of English

  • auxin — auxin. См. ауксин. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • auxin — (n.) plant growth hormone, 1934, from German (1931), from Gk. auxein to increase (see AUGMENT (Cf. augment)) + chemical suffix IN (Cf. in) (2) …   Etymology dictionary

  • auxin — [ôk′sin] n. [< Gr auxein, to increase (see WAX2) + IN1] a plant hormone, esp. indoleacetic acid, produced in the fruits, seeds, leaves, or stem tips, to promote longitudinal growth and to control bud growth, root formation, leaf abscission,… …   English World dictionary

  • Auxin — Auxins are a class of plant growth substance (often called phytohormone or plant hormone). Auxins play an essential role in coordination of many growth and behavioral processes in the plant life cycle.OverviewAuxins derive their name from the… …   Wikipedia

  • Auxin — Chemische Struktur von Indol 3 essigsäure, dem wichtigsten Auxin Gesunde Arabidops …   Deutsch Wikipedia

  • Auxin — Au|xin 〈n. 11〉 Pflanzenwuchsstoff [zu grch. auxein „wachsen“] * * * Au|xin [griech. aúxe̅ = Zuwachs, Vergrößerung; ↑ in (3)], das; s, e: Sammelbez. für versch. Verb. mit Pflanzenwuchsstoffeigenschaften, z. B. ↑ Indolessigsäure (Auxin im engeren… …   Universal-Lexikon

  • Auxin — Au|xin 〈n.; Gen.: s, Pl.: e; Bot.〉 Pflanzenwuchsstoff [Etym.: <grch. auxin »wachsen«] …   Lexikalische Deutsches Wörterbuch

  • auxin — auksinas statusas T sritis chemija apibrėžtis Augalų augimą reguliuojanti medžiaga, fitohormonas. atitikmenys: angl. auxin rus. ауксин …   Chemijos terminų aiškinamasis žodynas

  • auxin — auksinas statusas T sritis augalininkystė apibrėžtis Augimą skatinantis paties augalo endogeninis hormonas arba cheminiu būdu sintetinamas augalų augimo reguliatorius. atitikmenys: angl. auxin rus. ауксин …   Žemės ūkio augalų selekcijos ir sėklininkystės terminų žodynas


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