Institute of Plant and Microbial Biology, Academia Sinica, Taipei, 11529, Taiwan.
Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, Academia Sinica, Taipei, 11529, Taiwan.
Plant Cell Environ. 2017 Sep;40(9):1735-1747. doi: 10.1111/pce.12977. Epub 2017 Jun 20.
Light controls vegetative and reproductive development of plants. For a plant, sensing the light input properly ensures coordination with the ever-changing environment. Previously, we found that LIGHT-REGULATED WD1 (LWD1) and LWD2 regulate the circadian clock and photoperiodic flowering. Here, we identified Arabidopsis YET ANOTHER KINASE1 (AtYAK1), an evolutionarily conserved protein and a member of dual-specificity tyrosine phosphorylation-regulated kinases (DYRKs), as an interacting protein of LWDs. Our study revealed that AtYAK1 is an important regulator for various light responses, including the circadian clock, photomorphogenesis and reproductive development. AtYAK1 could antagonize the function of LWDs in regulating the circadian clock and photoperiodic flowering. By examining phenotypes of atyak1, we found that AtYAK1 regulated light-induced period-length shortening and photomorphogenic development. Moreover, AtYAK1 mediated plant fertility especially under inferior light conditions including low light and short-day length. This study discloses a new regulator connecting environmental light to plant growth.
光控制植物的营养生长和生殖生长。对于植物来说，正确感知光输入可确保与不断变化的环境协调。此前，我们发现 LIGHT-REGULATED WD1（LWD1）和 LWD2 调节生物钟和光周期开花。在这里，我们鉴定出拟南芥 YET ANOTHER KINASE1（AtYAK1），一种进化上保守的蛋白质，也是双特异性酪氨酸磷酸化调节激酶（DYRKs）的成员，作为 LWDs 的互作蛋白。我们的研究表明，AtYAK1 是各种光反应的重要调节剂，包括生物钟、光形态建成和生殖发育。AtYAK1 可以拮抗 LWDs 在调节生物钟和光周期开花中的功能。通过研究 atyak1 的表型，我们发现 AtYAK1 调节光诱导的周期长度缩短和光形态建成发育。此外，AtYAK1 介导植物的育性，特别是在低光照和短日照等较差的光照条件下。这项研究揭示了一个将环境光与植物生长联系起来的新调节剂。
