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Plant hormones (or plant growth regulators, or PGRs) are internally-secreted chemicals in plants that are used for regulating the plants' growth. According to a standard definition, plant hormones are signal molecules produced at specific locations, that occur in very low concentrations, and cause altered processes in target cells at other locations.
Charactistics Classes of Plant Hormones It is accepted that there are five major classes of plant hormones: Additional suggested hormone classes: See also | ||||||||
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