title: RICE SALT SENSITIVE3 binding to bHLH and JAZ factors mediates control of cell wall plasticity in the root apex.
abstract: Plasticity of root growth in response to environmental cues and stresses is a fundamental characteristic of plants, in accordance with their sessile lifestyle. This is linked to the balance between plasticity and rigidity of cells in the root apex, and thus is coordinated with the control of cell wall properties. However, mechanisms underlying such harmonization are not well understood, in particular under stressful conditions. We have recently demonstrated that RICE SALT SENSITIVE3 (RSS3), a nuclear factor that mediates restrictive expression of jasmonate-induced genes, plays an important role in root elongation under saline conditions. In this study, we report that loss-of-function of RSS3 results in changes in cell wall properties such as lignin deposition and sensitivity to a cellulose synthase inhibitor, concomitant with altered expression of genes involved in cell wall metabolism. Based on these and previous phenotypic observations of the rss3 mutant, we propose that RSS3 plays a role in the coordinated control of root elongation and cell wall plasticity in the root apex.
authors.affiliation: Bioscience and Biotechnology Center; Nagoya University; Chikusa, Nagoya, Japan.
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Toda
authors.affiliation: Graduate School of Bioagricultural Sciences; Nagoya University; Chikusa, Nagoya, Japan.
authors.forename: Masato
authors.initials: M
authors.lastname: Yoshida
authors.affiliation: Bioscience and Biotechnology Center; Nagoya University; Chikusa, Nagoya, Japan.
authors.forename: Tsukaho
authors.initials: T
authors.lastname: Hattori
authors.affiliation: Bioscience and Biotechnology Center; Nagoya University; Chikusa, Nagoya, Japan.
authors.forename: Shin
authors.initials: S
authors.lastname: Takeda
mesh_terms: D051778:Basic Helix-Loop-Helix Leucine Zipper Transcription Factors / Q000378:metabolism*; D001549:Benzamides / Q000494:pharmacology; D002473:Cell Wall / Q000187:drug effects / Q000235:genetics / Q000378:metabolism*; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D018519:Meristem / Q000166:cytology* / Q000235:genetics; D015591:Microspectrophotometry; D012275:Oryza / Q000166:cytology* / Q000187:drug effects / Q000235:genetics; D010940:Plant Proteins / Q000378:metabolism*; D011485:Protein Binding / Q000187:drug effects; D012097:Repressor Proteins / Q000378:metabolism*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D051778:Basic Helix-Loop-Helix Leucine Zipper Transcription Factors; D001549:Benzamides; D010940:Plant Proteins; D012097:Repressor Proteins; C057467:isoxaben
keywords: cell wall; environmental stress; jasmonate; lignin; plasticity; root apex; root elongation; salinity