Ke Danping, Guo Jinggong, Li Kun, Wang Yujie, Han Xiaomeng, Fu Weiwei, Miao Yuchen, Jia Kun-Peng
State Key Laboratory of Cotton Biology, Henan Joint International Laboratory for Crop Multi-Omics Research, School of Life Sciences, Henan University, Kaifeng, China.
Sanya Institute of Henan University, Sanya, Hainan, China.
Front Plant Sci. 2022 Oct 26;13:986414. doi: 10.3389/fpls.2022.986414. eCollection 2022.
Roots are important plant organs for the uptake of water and nutrient elements. Plant root development is finely regulated by endogenous signals and environmental cues, which shapes the root system architecture to optimize the plant growth and adapt to the rhizospheric environments. Carotenoids are precursors of plant hormones strigolactones (SLs) and ABA, as well as multiple bioactive molecules. Numerous studies have demonstrated SLs and ABA as essential regulators of plant root growth and development. In addition, a lot carotenoid-derived bioactive metabolites are recently identified as plant root growth regulators, such as anchorene, β-cyclocitral, retinal and zaxinone. However, our knowledge on how these metabolites affect the root architecture to cope with various stressors and how they interact with each other during these processes is still quite limited. In the present review, we will briefly introduce the biosynthesis of carotenoid-derived root regulators and elaborate their biological functions on root development and architecture, focusing on their contribution to the rhizospheric environmental adaption of plants.
根是植物吸收水分和营养元素的重要器官。植物根系发育受到内源性信号和环境线索的精细调控，这些信号和线索塑造了根系结构，以优化植物生长并适应根际环境。类胡萝卜素是植物激素独脚金内酯（SLs）和脱落酸（ABA）以及多种生物活性分子的前体。大量研究表明，SLs和ABA是植物根系生长和发育的重要调节因子。此外，最近还鉴定出许多类胡萝卜素衍生的生物活性代谢产物作为植物根系生长调节剂，如锚定烯、β-环柠檬醛、视黄醛和玉米素甾酮。然而，我们对于这些代谢产物如何影响根系结构以应对各种胁迫，以及它们在这些过程中如何相互作用的了解仍然非常有限。在本综述中，我们将简要介绍类胡萝卜素衍生的根系调节剂的生物合成，并阐述它们对根系发育和结构的生物学功能，重点关注它们对植物根际环境适应性的贡献。
