RSF1, an Arabidopsis locus implicated in phytochrome A signaling
RSF1, an Arabidopsis locus implicated in phytochrome A signaling
复制标题
DOI：
10.1104/pp.124.1.39
复制
发表时间：
2000-09-01
期刊：
影响因子：
7.4
通讯作者：
Chory, J
中科院分区：
文献类型：
--
作者：
Fankhauser, C;Chory, J
在拟南芥中，光敏色素A （phytochrome A, phyA）是对远红光的高辐照响应和广谱极低通量响应的主要光感受器，但对其信号通路知之甚少。Rsf1是一种对远红抑制下胚轴伸长敏感性降低的隐性突变体。在苗期，rsf1突变体在不同程度上影响了所有已知的植物介导的反应。然而，在成年rsf1植物中，光周期开花反应是正常的。rsf1突变体具有野生型水平的phyA，这表明rsf1是phyA信号传递所必需的，而不是phyA的稳定性或生物合成所必需的。因此，RSF1在幼苗中似乎是一个主要的phyA信号成分，但在成年拟南芥植物中却不是。
In Arabidopsis, phytochrome A (phyA) is the major photoreceptor both for high irradiance responses to far-red light and broad spectrum very low fluence responses, but little is known of its signaling pathway(s). rsf1 was isolated as a recessive mutant with reduced sensitivity to far-red inhibition of hypocotyl elongation. At the seedling stage rsf1 mutants are affected, to various degrees, in all described phyA-mediated responses. However, in adult rsf1 plants, the photoperiodic flowering response is normal. The rsf1 mutant has wild-type levels of phyA suggesting that RSF1 is required for phyA signaling rather than phyA stability or biosynthesis. RSF1 thus appears to be a major phyA signaling component in seedlings, but not in adult, Arabidopsis plants.