Arabidopsis CAP1-mediated ammonium sensing required reactive oxygen species in plant cell growth

Plant Signaling & Behavior
Ling BaiChun-Peng Song

Abstract

[Ca(2+)]cyt-associated protein kinase (CAP) gene 1 is a receptor-like kinase that belongs to CrRLK1L (Catharanthus roseus Receptor like kinase) subfamily. CAP1 has been identified as a novel modulator of NH4(+) in the tonoplast, which regulates root hair growth by maintaining the cytoplasmic Ca(2+) gradients. Different expression pattern of tonoplast intrinsic protein (TIP2;3) in the CAP1 knock out mutant and wild type on Murashige and Skoog (MS) medium suggested that CAP1 influences transport activity to regulate the compartmentalization of NH4(+) into vacuole. Lower expression level of Oxidative Signal-Inducible1(OXI1) in the cap1-1 root and the abnormal reactive oxygen species (ROS) gradient in root hair of cap1-1 on MS medium indicated that ROS signaling involve in CAP1-regulated root hair growth. Wild-type-like ROS distribution pattern in the cap1-1 root hair can be reestablished in seedlings grown on NH4(+) deficient medium, which indicated that CAP1 functions as a sensor for NH4(+) signaling in maintaining tip-focused ROS gradient in root hairs polar growth.

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Citations

Jan 19, 2016·Trends in Plant Science·Karen S NissenFrederikke G Malinovsky
Sep 14, 2016·Frontiers in Plant Science·Sergio Galindo-TrigoLisa M Smith
Jun 1, 2017·International Journal of Molecular Sciences·Kevin BellandeHervé Canut
Jan 19, 2018·International Journal of Molecular Sciences·Limin GaoQirong Shen
Mar 15, 2018·Annual Review of Plant Biology·Christina Maria FranckAurélien Boisson-Dernier
Dec 1, 2017·Frontiers in Plant Science·Sébastjen SchoenaersKris Vissenberg
May 5, 2018·Journal of Integrative Plant Biology·Zhuoyun Wei, Jia Li
Apr 4, 2017·Journal of Experimental Botany·Ying Liu, Nicolaus von Wirén

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