Center for Integrative Genomics, Faculty of Biology and Medicine, University of Lausanne, CH-1015, Lausanne, Switzerland.
Physiol Plant. 2020 Jul;169(3):357-368. doi: 10.1111/ppl.13098. Epub 2020 Apr 5.
Positive phototropism is the process through which plants orient their organs toward a directional light source. While the blue light receptors phototropins (phot) play a major role in phototropism toward blue (B) and ultraviolet (UV) radiation, recent research showed that the UVB light receptor UVR8 also triggers phototropism toward UVB. In addition, new details of the molecular mechanisms underlying the activity of these receptors and interaction with other environmental signals have emerged in the past years. In this review, we summarize the current knowledge about hypocotyledoneous and inflorescence stem growth reorientation toward B and UVB, with a focus on the molecular mechanisms.
正向光性是指植物器官朝向定向光源的过程。虽然蓝光受体光受体（phot）在向蓝光（B）和紫外线（UV）辐射的光性中起着主要作用，但最近的研究表明，UVB 光受体 UVR8 也会引发向 UVB 的光性。此外，在过去几年中，这些受体的活性及其与其他环境信号相互作用的分子机制的新细节已经出现。在这篇综述中，我们总结了关于下胚轴和花序茎向 B 和 UVB 重新生长的当前知识，重点是分子机制。
