Abstract：
In the dynamic environment of plants, the interplay between light-dependent growth and iron nutrition is a recurring challenge. Plants respond to low iron levels by adjusting growth and physiology through enhanced iron acquisition from the rhizosphere and internal iron pool reallocation. Iron deficiency response assays and gene co-expression networks aid in documenting physiological reactions and unraveling gene regulatory cascades, offering insight into the interplay between hormonal and external signaling pathways. However, research directly exploring the significance of light in iron nutrition remains limited. This review provides an overview on iron deficiency regulation and its cross-connection with distinct light signals, focusing on transcription factor cascades and long-distance signaling. The circadian clock and retrograde signaling influence iron uptake and allocation. The light-activated shoot-to-root mobile transcription factor ELONGATED HYPOCOTYL5 (HY5) affects iron homeostasis responses in roots. Blue light triggers the formation of biomolecular condensates containing iron deficiency-induced protein complexes. The potential of exploiting the connection between light and iron signaling remains underutilized. With climate change and soil alkalinity on the rise, there is a need to develop crops with improved nutrient use efficiency and modified light dependencies. More research is needed to understand and leverage the interplay between light signaling and iron nutrition.
摘要：
在植物的动态环境中，光依赖性生长和铁营养之间的相互作用是一个反复出现的挑战。植物通过增强根际铁的获取和内部铁池的重新分配来调节生长和生理来应对低铁水平。铁缺乏反应测定和基因共表达网络有助于记录生理反应和解开基因调控级联，深入了解荷尔蒙和外部信号通路之间的相互作用。然而,直接探索光在铁营养中的意义的研究仍然有限。这篇综述概述了缺铁调节及其与不同光信号的交叉联系，专注于转录因子级联和长距离信号传导。生物钟和逆行信号影响铁的摄取和分配。光活化的芽到根移动转录因子ELONGATED下叶5（HY5）影响根中的铁稳态反应。蓝光触发含有缺铁诱导的蛋白质复合物的生物分子缩合物的形成。利用光和铁信号之间的联系的潜力仍然没有得到充分利用。随着气候变化和土壤碱度的上升，需要开发具有改善的养分利用效率和改良的光依赖性的作物。需要更多的研究来理解和利用光信号和铁营养之间的相互作用。
