Role of Phytohormones in Plants
Reva Jaryal*
Dept. of Seed Science and Technology, Dr YS Parmar University of Horticulture & Forestry, Nauni, Solan, Himachal Pradesh (173 230), India
Divesh Thakur
Dept. of Floriculture and Landscape Architecture, Dr YS Parmar University of Horticulture & Forestry, Nauni, Solan, Himachal Pradesh (173 230), India
DOI: NIL
Keywords: Brassinosteroids, Inhibitors, Phytohormones, Promoters
Abstract
Phytohormones are organic compounds, other than nutrients and vitamins, which are produced naturally in plants, synthesized in one part and usually translocated to other part where in very small quantity it affects the growth and other physiological function of the plant. These are classified into two types namely plant growth promoters (Auxins, Gibberellins and Cytokinins) and plant growth inhibitors (Ethylene and Abscisic acid). Certain compounds synthesized artificially also cause many physiological responses common to phytohormones. But the more recent ones such as brassinosteroids and jasmonates cannot be excluded from PGRs due to their significant role in important functions of plants. It is obvious that changes in the level of endogenous hormones due to biotic and abiotic stress alter the crop growth and any sort of manipulation including exogenous application of growth substances would help for yield improvement or at least sustenance of the crop.
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Reference
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