光敏色素A调控拟南芥中向光性增强的红光诱导过程。
Phytochrome A regulates red-light induction of phototropic enhancement in Arabidopsis.
作者信息
Parks B M, Quail P H, Hangarter R P
机构信息
Department of Plant Biology, Ohio State University, Columbus 43210, USA.
出版信息
Plant Physiol. 1996 Jan;110(1):155-62. doi: 10.1104/pp.110.1.155.
Abstract
Phytochrome A (phyA) and phytochrome B photoreceptors have distinct roles in the regulation of plant growth and development. Studies using specific photomorphogenic mutants and transgenic plants overexpressing phytochrome have supported an evolving picture in which phyA and phytochrome B are responsive to continuous far-red and red light, respectively. Photomorphogenic mutants of Arabidopsis thaliana that had been selected for their inability to respond to continuous irradiance conditions were tested for their ability to carry out red-light-induced enhancement of phototropism, which is an inductive phytochrome response. We conclude that phyA is the primary photoreceptor regulating this response and provide evidence suggesting that a common regulatory domain in the phyA polypeptide functions for both high-irradiance and inductive phytochrome responses.
摘要
光敏色素A（phyA）和光敏色素B光受体在植物生长发育的调控中具有不同的作用。利用特定的光形态建成突变体和过表达光敏色素的转基因植物进行的研究支持了一种不断演变的观点，即phyA和光敏色素B分别对连续远红光和红光有反应。对因无法对连续辐照条件作出反应而被挑选出的拟南芥光形态建成突变体进行测试，以检测它们进行红光诱导的向光性增强的能力，这是一种诱导性光敏色素反应。我们得出结论，phyA是调节这种反应的主要光受体，并提供证据表明phyA多肽中的一个共同调节结构域对高辐照度和诱导性光敏色素反应均起作用。
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