Institute of Botany, Heinrich Heine University, Universitätsstr. 1, Düsseldorf, Germany.
Cluster of Excellence on Plant Science (CEPLAS), Heinrich Heine University, Düsseldorf, Germany.
Plant Biol (Stuttg). 2021 May;23 Suppl 1:31-38. doi: 10.1111/plb.13261. Epub 2021 May 13.
Osmotic stresses, such as salinity and drought, have deleterious effects on uptake and translocation of essential mineral nutrients. Iron (Fe) is an important micronutrient that regulates many processes in plants. Plants have adopted various molecular and physiological strategies for Fe acquisition from soil and transport to and within plants. Dynamic Fe signalling in plants tightly regulates Fe uptake and homeostasis. In this way, Fe nutrition is adjusted to growth and stress conditions, and Fe deficiency-regulated transcription factors, such as FER-LIKE IRON DEFICIENCY-INDUCED TRANSCRIPTION FACTOR (FIT), act as regulatory hubs in these responses. Here, we review and analyse expression of the various components of the Fe signalling during osmotic stresses. We discuss common players in the Fe and osmotic stress signalling. Furthermore, this review focuses on exploring a novel and exciting direct connection of regulatory mechanisms of Fe intake and acquisition with ABA-mediated environmental stress cues, like salt/drought. We propose a model that discuss how environmental stress affects Fe uptake and acquisition and vice versa at molecular-physiological levels in plants.
渗透胁迫，如盐度和干旱，对必需矿质养分的吸收和转运有有害影响。铁（Fe）是一种重要的微量元素，调节植物中的许多过程。植物已经采用了各种分子和生理策略来从土壤中获取铁并将其运输到植物体内和植物体内。植物中铁的动态信号转导严格调节铁的吸收和体内平衡。通过这种方式，铁营养可以根据生长和胁迫条件进行调整，并且铁缺乏调节转录因子，如 FER-LIKE IRON DEFICIENCY-INDUCED TRANSCRIPTION FACTOR（FIT），作为这些反应中的调节枢纽。在这里，我们综述并分析了在渗透胁迫过程中 Fe 信号的各种成分的表达。我们讨论了 Fe 和渗透胁迫信号转导中的常见参与者。此外，本综述重点探讨了铁摄入和获取的调节机制与 ABA 介导的环境胁迫信号（如盐/干旱）之间的直接联系。我们提出了一个模型，讨论了环境胁迫如何在分子生理水平上影响植物中铁的吸收和获取，反之亦然。
