Responses to Systemic Nitrogen Signaling in Arabidopsis Roots Involve trans -Zeatin in Shoots

The Plant Cell
Arthur PoitoutSandrine Ruffel

Abstract

Plants face temporal and spatial variation in nitrogen (N) availability. This includes heterogeneity in soil nitrate (NO3-) content. To overcome these constraints, plants modify their gene expression and physiological processes to optimize N acquisition. This plasticity relies on a complex long-distance root-shoot-root signaling network that remains poorly understood. We previously showed that cytokinin (CK) biosynthesis is required to trigger systemic N signaling. Here, we performed split-root experiments and used a combination of CK-related mutant analyses, hormone profiling, transcriptomic analysis, NO3- uptake assays, and root growth measurements to gain insight into systemic N signaling in Arabidopsis thaliana By comparing wild-type plants and mutants affected in CK biosynthesis and ABCG14-dependent root-to-shoot translocation of CK, we revealed an important role for active trans-zeatin (tZ) in systemic N signaling. Both rapid sentinel gene regulation and long-term functional acclimation to heterogeneous NO3- supply, including NO3- transport and root growth regulation, are likely mediated by the integration of tZ content in shoots. Furthermore, shoot transcriptome profiling revealed that glutamate/glutamine metabolism is l...Continue Reading

Citations

Aug 8, 2018·Plant & Cell Physiology·Sandrine Ruffel
Aug 22, 2018·International Journal of Molecular Sciences·Jaroslav PavlůMartin Černý
Nov 30, 2018·Plant, Cell & Environment·Anne CortlevenThomas Schmülling
Jun 20, 2019·Frontiers in Plant Science·Chang-Jun LiuKewei Zhang
Apr 5, 2020·Plants·Nguyen Ngoc HaiNguyen Phuong Thao
Feb 6, 2020·Proceedings of the National Academy of Sciences of the United States of America·Elisa KorenblumAsaph Aharoni
Apr 4, 2020·Science·Giles E D Oldroyd, Ottoline Leyser
Nov 16, 2019·Plant & Cell Physiology·Pamela A NaulinRodrigo A Gutiérrez
Jan 24, 2020·Journal of Experimental Botany·Zhongtao Jia, Nicolaus von Wirén
Dec 5, 2019·Journal of Experimental Botany·Bohan LiuYinbo Gan
Sep 6, 2020·The Plant Journal : for Cell and Molecular Biology·Letian JiaWei Xuan
Jan 11, 2020·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Zhihua ZhangChengcai Chu
Oct 6, 2020·The Plant Journal : for Cell and Molecular Biology·Hitoshi Sakakibara
Dec 22, 2020·Plant, Cell & Environment·Cara D WheeldonTom Bennett
Dec 8, 2020·Trends in Plant Science·Franziska FichtnerFrancois Barbier
Jun 25, 2020·Seminars in Cell & Developmental Biology·Cara D Wheeldon, Tom Bennett
Nov 20, 2020·Journal of Integrative Plant Biology·Xiaoqian ChuMing-Yi Bai
Dec 29, 2020·Trends in Plant Science·Pierre GautratSandrine Ruffel
Apr 2, 2021·Plant Physiology·Sarah JohnsSimon Gilroy
May 28, 2021·Frontiers in Plant Science·Suresh KumarTrilochan Mohapatra
Jun 25, 2021·The Plant Journal : for Cell and Molecular Biology·Joanna K PolkoJoseph J Kieber
Jul 11, 2021·Physiologia Plantarum·Sara BuosoLaura Zanin
Mar 27, 2021·Plant Physiology·Pierre-Mathieu PélissierTom Beeckman
Dec 18, 2021·Molecular Plant·Zhongtao JiaNicolaus von Wirén

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