The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Science, Shandong University, Qingdao 266237, China.
School of Life Science, Guangzhou University, Guangzhou 510006, China.
Int J Mol Sci. 2020 Nov 19;21(22):8742. doi: 10.3390/ijms21228742.
Polar auxin transport mediated by PIN-FORMED (PIN) proteins is critical for plant growth and development. As an environmental cue, shade stimulates hypocotyls, petiole, and stem elongation by inducing auxin synthesis and asymmetric distributions, which is modulated by PIN3,4,7 in . Here, we characterize the and , which are the orthologs of ,,, in model legume species . Under the low Red:Far-Red (R:FR) ratio light, the expression of and is induced, and shadeavoidance response is disrupted in double mutant, indicating that and have a conserved function in shade response. Surprisingly, under the normal growth condition, displayed the constitutive shade avoidance responses, such as the elongated petiole, smaller leaf, and increased auxin and chlorophyll content. Therefore, and play dual roles in regulation of shadeavoidance response under different environments. Furthermore, these data suggest that ,, and its orthologs have evolved conserved and specific functions among species.
极性生长素运输由 PIN 蛋白介导，对于植物的生长和发育至关重要。作为一种环境线索，遮荫通过诱导生长素的合成和不对称分布来刺激下胚轴、叶柄和茎的伸长，这一过程受 PIN3、4、7 在. 中的调节。在这里，我们对 和 进行了表征，它们是模型豆科植物. 中 、 、 的直系同源物。在低红光：远红光（R:FR）比值的光线下， 和 的表达被诱导，并且在 双突变体中，避荫反应被破坏，表明 和 在避荫反应中具有保守功能。令人惊讶的是，在正常生长条件下， 表现出组成型的避荫反应，如叶柄伸长、叶片变小、生长素和叶绿素含量增加。因此， 和 在不同环境下调节避荫反应中发挥双重作用。此外，这些数据表明,, 及其直系同源物在物种间进化出了保守和特定的功能。
