Plant Growth Factor

Plant Growth Factor

 

any one of several natural and synthetic compounds that intensify growth processes in plants. Natural plant growth factors include phytohormones (auxins, gibberellins, and cytokinins) and certain vitamins. Some growth factors, particularly those from the auxin group (heteroauxin and its analogues, indolylbutyric acid and a-naphthylacetic acid), can be produced synthetically.

Balanced growth of plants involves two-way regulation by means of natural growth substances that stimulate and inhibit the growth process. The use of synthetic plant growth factors partially deactivates the endogenous growth inhibitors and activates the phytohormones; as a result, there is temporary intensification of growth and organogenetic processes.

Plant growth factors are used in horticulture in the form of aqueous solutions, pastes, emulsions, dusts, aerosols, and vapors. They accelerate the rooting of cuttings of many cultivated plants (cherry, plum, rose). The substances are also used to accelerate flowering and, hence, fruit formation (eggplant, tomato, fig, and mandarin) and to increase the size of fruits and berries (grapes). In addition, plant growth factors are used to prevent preharvest falling of apples and pears, to bring seeds, tubers, and bulbs out of dormancy, and to accelerate ripening of picked fruits.

V. I. KEFELI

References in periodicals archive ?
Organic substance in soil would be mineralized by microbes through enzymatic processes turn into plant nutritive value as well as plant growth factor [25,3].
PQQ is also a potent plant growth factor. Consequently, for animals and humans, there has been constant exposure to PQQ.
In addition, this summer Almay will roll out Lip Vitality Smoothing Lipcolor with Kinetin, which is a plant growth factor and antiaging ingredient found in green, leafy plants.
The comprehensive line contains kinetin, a plant growth factor and stable antioxidant found in green, leafy plants.
muscarium had a lower final nematode population, ultimately resulting in positive effects on plant growth factors (root shoot lengths and shoot weight) (Yang et al., 2012).

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