MOE Key Laboratory of Bioinformatics, School of Life Sciences, Center for Plant Biology, Tsinghua University, Beijing, 100084, China.
J Integr Plant Biol. 2021 Jun;63(6):1065-1090. doi: 10.1111/jipb.13090. Epub 2021 Apr 14.
Phosphorus is an essential macronutrient for plant growth and development. Root system architecture (RSA) affects a plant's ability to obtain phosphate, the major form of phosphorus that plants uptake. In this review, I first consider the relationship between RSA and plant phosphorus-acquisition efficiency, describe how external phosphorus conditions both induce and impose changes in the RSA of major crops and of the model plant Arabidopsis, and discuss whether shoot phosphorus status affects RSA and whether there is a universal root developmental response across all plant species. I then summarize the current understanding of the molecular mechanisms governing root developmental responses to phosphorus deficiency. I also explore the possible reasons for the inconsistent results reported by different research groups and comment on the relevance of some studies performed under laboratory conditions to what occurs in natural environments.
磷是植物生长和发育所必需的大量营养素。根系结构（RSA）会影响植物获取磷酸盐的能力，而磷酸盐是植物吸收的主要磷形式。在这篇综述中，我首先考虑 RSA 与植物磷获取效率之间的关系，描述主要作物和模式植物拟南芥的 RSA 如何在外部磷条件下被诱导和改变，讨论植株磷含量是否会影响 RSA 以及是否所有植物物种都存在普遍的根发育反应。然后，我总结了目前对控制根发育响应磷缺乏的分子机制的理解。我还探讨了不同研究小组报告的不一致结果的可能原因，并评论了在实验室条件下进行的一些研究与自然环境中发生的情况的相关性。
