Fankhauser C, Chory J
Plant Biology Laboratory, Salk Institute for Biological Studies, La Jolla, California 92037, USA.
Annu Rev Cell Dev Biol. 1997;13:203-29. doi: 10.1146/annurev.cellbio.13.1.203.
To grow and develop optimally, all organisms need to perceive and process information from both their biotic and abiotic surroundings. A particularly important environmental cue is light, to which organisms respond in many different ways. Because they are photosynthetic and non-motile, plants need to be especially plastic in response to their light environment. The diverse responses of plants to light require sophisticated sensing of its intensity, direction, duration, and wavelength. The action spectra of light responses provided assays to identify three photoreceptor systems absorbing in the red/far-red, blue/near-ultraviolet, and ultraviolet spectral ranges. Following absorption of light, photoreceptors interact with other signal transduction elements, which eventually leads to many molecular and morphological responses. While a complete signal transduction cascade is not known yet, molecular genetic studies using the model plant Arabidopsis have led to substantial progress in dissecting the signal transduction network. Important gains have been made in determining the function of the photoreceptors, the terminal response pathways, and the intervening signal transduction components.
为了实现最佳的生长和发育，所有生物体都需要感知并处理来自其生物和非生物环境的信息。一个特别重要的环境信号是光，生物体对光有许多不同的反应方式。由于植物进行光合作用且不能移动，它们需要对光照环境具有特别的适应性。植物对光的多种反应需要对光的强度、方向、持续时间和波长进行精确感知。光反应的作用光谱提供了检测方法，以识别在红/远红、蓝/近紫外和紫外光谱范围内吸收光的三种光受体系统。光被吸收后，光受体与其他信号转导元件相互作用，最终导致许多分子和形态学反应。虽然完整的信号转导级联尚未明确，但利用模式植物拟南芥进行的分子遗传学研究在剖析信号转导网络方面取得了重大进展。在确定光受体的功能、终端反应途径以及中间信号转导成分方面已经取得了重要成果。
