hormonal regulation of plant growth and development激素调节植物的生长和发展.pdfVIP

Open access, freely available online Primer Hormonal Regulation of Plant Growth and Development William M. Gray Phytohormones: What Are they? The concept of plant hormones and response mutants has provided Plant growth and development originates from a classical experiment powerful new tools for painting a involves the integration of many on phototropism, the bending of plants clearer picture of the roles of the environmental and endogenous signals toward light, carried out by Charles various phytohormones in plant growth that, together with the intrinsic genetic Darwin and his son Francis in 1880. and development. The Darwins were able to demonstrate program, determine plant form. that when oat seedlings were exposed How Do They Work? Fundamental to this process are several growth regulators collectively called the to a lateral light source, a transported Plant biologists have been plant hormones or phytohormones. signal originating from the plant apex fascinated by the regulatory capacity This group includes auxin, cytokinin, promoted differential cell elongation of phytohormones since the time of the gibberellins (GAs), abscisic acid in the lower parts of the seedling that their discovery, and the notion that (ABA), ethylene, the brassinosteroids resulted in it bending toward the light hormone levels or responses could be (BRs), and jasmonic acid (JA), each source. This signal was subsequently mani