Biology 2601A/B Lecture Notes - Lecture 12: Osmosis, S Phase, Electrochemical Gradient
24 Aug 2013
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Document Summary
A hormone is an organic compound produced in small amounts in one part of a plant and transported to target cells in another part, where it causes a physiological response. A plant hormone can also elicit its response in the same cell it was produced. Research on hormones is complex because a single hormone may affect many target tissues. Moreover, hormones are usually present in low concentrations and may exist in many chemical forms (inactive, active, etc. ). In addition, several hormones may affect the same response, and hormones may interact with one another rather than working independently. Different plant hormones that are known today include: gibberellins (gas), cytokinins (cks), Brassinosteroids (brs), auxins, ethylene, abscisic acid (aba), salicylic acid (sa), and jasmonic acid (ja). The last two are often categorized as one class of plant hormones since they more or less perform the same function.
