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Related to Gibberellins: gibberellic acid, abscisic acid


Any of several plant hormones, such as gibberellic acid, that stimulate stem elongation, seed germination, and other physiological processes.

[From New Latin Gibberella (fujikoroī), the fungus from which a gibberellin was first isolated, from Latin gibberella, feminine diminutive of gibber, hump (from the humplike shape of the genus's perithecia).]


(Botany) any of several plant hormones, including gibberellic acid, whose main action is to cause elongation of the stem: used in promoting the growth of plants, in the malting of barley, etc


(ˌdʒɪb əˈrɛl ɪn)

any of a class of growth hormones occurring in fungi and plants.
[1935–40; < New Latin Gibberella]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.gibberellin - a plant hormone isolated from a fungus; used in promoting plant growth
growth regulator, phytohormone, plant hormone - (botany) a plant product that acts like a hormone
gibberellic acid - a crystalline acid associated with gibberellin
References in periodicals archive ?
This fact can be explained by the presence of hormones in seeds, mainly cytokinins and gibberellins, which aid in cell division and expansion, and in the mobilization of nutrients (JACKSON, 2003).
The gibberellins (GAs) are a large group of tetracyclic diterpenoid carboxylic acids, The GAs show positive effects on seed germination, leaf expansion, stem elongation, flower and trichome initiation, and flower and fruit development, They are essential for plants throughout their life cycle for growth-stimulatory functions.
Gibberellins soaking could significantly improve the seed germination rate; low temperature storage could prolong the vitality of gentian seeds.
8 + +++ fluorescent Plant growth promoting traits Pseudomonas isolates Plant growth regulators ([micro]g /ml) Auxins Gibberellins Cytokinins An-1-Jub 17 150 18 An-3-Jub 19 70 30 An-4-Jub 19 90 22 An-5-Jub 14 120 30 Ar-1-Jub 13 100 25 An-1-Sh 21 180 28 An-2-Sh 07 60 35 Ar-1-Sh 22 80 28 Ar-2-Sh 21 110 28 L 16 135 20 M 11 140 24 C 36 160 16 * Phosphate solubilizing activity expressed in terms of tricalcium phosphate solubilization which in turn represents pg/ml of soluble inorganic phosphate(Pi) in supernatant as calibrated from the standard curve of K[H.
Regarding gibberellins, this plant hormone influences germination, seedling growth, stem elongation, leaf development, bud outgrowth, flower induction, and xylem expansion (Gabriele et al.
It has been demonstrated that fruit set and early development are mainly induced by endogenous hormones produced in the ovaries, such as auxins and gibberellins (GAs), which have been described in the ovaries of pollinated or parthenocarpic fruits [5], or the exogenous application of hormones to unpollinated ovaries [6-7].
Effect of prohexadione-calcium on growth components and endogenous gibberellins contents ofrice (OryzasativaL.
However, higher germination for dark incubated seeds could indicate the biosynthesis of gibberellins (mediated through the phytochrome system) may have been inhibited by light exposure (Kato-Noguchi, 2002).
Some of these mecha-nisms include inhibition of arachidonic acid pathway as well as inhibition of inflammatory mediators such as histamine, prostaglandins and serotonin15 due to presence of anti-inflammatory agents like lectins, Sali-cyclic acid, acemanan, isoaloeresin D, malic acid acy-lated carbohydrates, auxins, gibberellins, bradykinases and superoxie dismutase.