A01：Systemic regulation of iron acquisition in plants
Ryo TABATA
（Graduate School of Bioagricultural Sciences, Nagoya University）
Lab website
Iron distribution within the soil is generally heterogeneous. Plants therefore have evolved sophisticated systemic mechanisms enabling them to optimize their iron acquisition efficiency. With organ-to-organ communication in plants, for instance, iron starvation on one part of a root drives the upregulation of a high-affinity iron uptake system on another part of the root that is surrounded by sufficient amount of iron. This compensatory response through root-shoot-root signaling includes upregulation of Iron-regulated transporter 1 (IRT1) gene expression on the iron-sufficient side of the root. However, molecular mechanisms underlying this systemic signaling remain unclear. In this project, we will analyze the role of mobile signal candidates for systemic signaling pathway in response to local iron-starvation by using molecular biological, chemical and imaging approach. We will also build a quantitative model to understand systemic regulation of iron acquisition in plants.
Major publications
H. Tsutsui, N. Yanagisawa, Y. Kawakatsu, S. Ikematsu, Y. Sawai, R. Tabata, H. Arata, T. Higashiyama, M. Notaguchi
“Micrografting device for testing environmental conditions for grafting and systemic signaling in Arabidopsis”
The Plant Journal 2020, in press
doi: 10.1111/tpj.14768
Y. Ohkubo, M. Tanaka, R. Tabata, M. Ogawa-Ohnishi, Y. Matsubayashi
“Shoot-to-root mobile polypeptides involved in systemic regulation of nitrogen acquisition”
Nature Plants 2017, 3, 17029
doi: 10.1038/nplants.2017.29
S. Okamoto, R. Tabata, Y. Matsubayashi
“Long-distance peptide signaling essential for nutrient homeostasis in plants”
Current Opinion in Plant Biology 2016, 34, 35-40
doi: 10.1016/j.pbi.2016.97.009
R. Tabata, K. Sumida, T. Yoshii, K. Ohyama, H. Shinohara, Y. Matsubayashi
“Perception of root-derived peptides by shoot LRR-RKs mediates systemic N-demand signaling”
Science 2014, 346, 343-346
doi: 10.1126/science.1257800