auxins


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Related to auxins: callus, Plant hormones, Cytokinins

au·xins

(auk'sinz),
A type of plant hormone.
References in periodicals archive ?
The number of roots was proportional to the concentrations of auxins except at the high concentration of auxins.
Ethylene stimulated rooting by enhancing the increase in auxins.
In commercial horticulture practices, various synthetic auxins are used not only to speed the rate of production, but also to increase the total number of roots produced.
The six classes of plant hormones are auxins, gibberellins, cytokinins, abscisic acid (ABA), ethylene, and brassinosteroids.
L-Tryptophan (L-TRP) serves as a physiological precursor for the biosynthesis of auxins in plants and in microbes (Frankenberger and Arshad 1995).
For example, excised tobacco leaf tissues grew more rapidly incubated in auxin over a 20 hour period resulting in epinastic (downward) curvature (2, 3) and one-time application of auxins to expanding common bean (Phaseolus vulgaris) leaves produced transient (multi-hour) hyponasty (upward curvature) due to increased abaxial (underside) cell expansion (3).
However, there is convincing evidences that auxins are essential for root development (Hartmann and Kester, 1982).
Field studies were planned to ascertain the role of microbial biosynthesis of auxins through L-TRP on auxins production potential and wheat growth.
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].