Regulation of Gene Expression by Ethylene
In plants, many processes are regulated by a small number of hormones: auxin, abscisic acid, cytokinin, gibberellin, and ethylene (for review, see Wareing and Phillips, 1981). Plant hormones, like animal hormones, are active in extremely small quantities and influence the growth and differentiation of tissues and organs. However, certain important aspects about plant hormone action are unique. That is, each plant hormone is synthesized in many parts of the plant and each regulates a wide variety of different processes depending on the organ or tissue. Furthermore, plants regulate many processes by modulating both hormone concentration and sensitivity to the hormone (Trewavas, 1982; Trewavas et al., 1983). Thus, understanding the mechanism of plant hormone action involves knowing how both hormone concentration and tissue sensitivity regulate cellular differentiation.
KeywordsFruit Development Tomato Fruit Ethylene Biosynthesis Ethylene Concentration Unripe Fruit
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