Molecular Plant Nutrition, Department of Physiology & Cell Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Corrensstr. 3, 06466 Stadt Seeland, OT Gatersleben, Germany.
Molecular Plant Nutrition, Department of Physiology & Cell Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Corrensstr. 3, 06466 Stadt Seeland, OT Gatersleben, Germany.
Mol Plant. 2022 Jan 3;15(1):86-103. doi: 10.1016/j.molp.2021.12.004. Epub 2021 Dec 15.
Optimal plant development requires root uptake of 14 essential mineral elements from the soil. Since the bioavailability of these nutrients underlies large variation in space and time, plants must dynamically adjust their root architecture to optimize nutrient access and acquisition. The information on external nutrient availability and whole-plant demand is translated into cellular signals that often involve phytohormones as intermediates to trigger a systemic or locally restricted developmental response. Timing and extent of such local root responses depend on the overall nutritional status of the plant that is transmitted from shoots to roots in the form of phytohormones or other systemic long-distance signals. The integration of these systemic and local signals then determines cell division or elongation rates in primary and lateral roots, the initiation, emergence, or elongation of lateral roots, as well as the formation of root hairs. Here, we review the cascades of nutrient-related sensing and signaling events that involve hormones and highlight nutrient-hormone relations that coordinate root developmental plasticity in plants.
植物的最佳生长发育需要从土壤中吸收 14 种必需的矿物质元素。由于这些养分的生物利用度在空间和时间上存在很大差异，因此植物必须动态地调整其根系结构，以优化养分的获取。外部养分可用性和整株植物需求的信息被转化为细胞信号，这些信号通常涉及植物激素作为中间物质来触发系统性或局部受限的发育反应。这种局部根系反应的时间和程度取决于植物的整体营养状况，这种状况以植物激素或其他系统性长距离信号的形式从地上部分传递到地下部分。这些系统性和局部信号的整合，然后决定了主根和侧根的细胞分裂或伸长率、侧根的起始、出现或伸长以及根毛的形成。在这里，我们综述了涉及激素的与养分相关的感应和信号转导级联反应，并强调了协调植物根系发育可塑性的养分-激素关系。
