Department of Chemistry, Seoul National University, Seoul 08826, Korea; Plant Genomics and Breeding Institute, Seoul National University, Seoul 08826, Korea.
Plant Genomics and Breeding Institute, Seoul National University, Seoul 08826, Korea.
Trends Plant Sci. 2023 Aug;28(8):902-912. doi: 10.1016/j.tplants.2023.03.014. Epub 2023 Apr 15.
Karrikins (KARs) are small butenolide compounds identified in the smoke of burning vegetation. Along with the stimulating effects on seed germination, KARs also regulate seedling vigor and adaptive behaviors, such as seedling morphogenesis, root hair development, and stress acclimation. The pivotal KAR signaling repressor, SUPPRESSOR OF MAX2 1 (SMAX1), plays central roles in these developmental and morphogenic processes through an extensive signaling network that governs seedling responses to endogenous and environmental cues. Here, we summarize the versatile roles of SMAX1 reported in recent years and discuss how SMAX1 integrates multiple growth hormone signals into optimizing seedling establishment. We also discuss the evolutionary relevance of the SMAX1-mediated signaling pathways during the colonization of aqueous plants to terrestrial environments.
卡里卡丁（KARs）是在燃烧植被的烟雾中发现的小分子丁烯内酯化合物。除了对种子萌发有刺激作用外，KARs 还调节幼苗活力和适应行为，如幼苗形态发生、根毛发育和应激适应。关键的 KAR 信号抑制剂 MAX2 1 抑制蛋白 1（SMAX1）通过广泛的信号网络在这些发育和形态发生过程中发挥核心作用，该网络调节幼苗对内源性和环境线索的反应。在这里，我们总结了近年来报道的 SMAX1 的多种作用，并讨论了 SMAX1 如何将多种生长激素信号整合到优化幼苗建立中。我们还讨论了 SMAX1 介导的信号通路在水生植物向陆地环境的殖民过程中的进化相关性。
