title: Long-distance peptide signaling essential for nutrient homeostasis in plants.
abstract: Organ-to-organ communication is indispensable for higher organisms to maintain homeostasis over their entire life. Recent findings have uncovered that plants, like animals, mediate organ-to-organ communication by long-distance signaling through the vascular system. In particular, xylem-mobile secreted peptides have attracted much attention as root-to-shoot long-distance signaling molecules in response to fluctuating environmental nutrient status. Several leguminous CLE peptides induced by rhizobial inoculation act as 'satiety' signals in long-distance negative feedback of nodule formation. By contrast, Arabidopsis CEP family peptides induced by local nitrogen (N)-starvation behave as systemic 'hunger' signals to promote compensatory N acquisition in other parts of the roots. Xylem sap peptidomics also implies the presence of still uncharacterized long-distance signaling peptides. This review highlights the current understanding of and new insights into the mechanisms and functions of root-to-shoot long-distance peptide signaling during environmental responses.
authors.affiliation: Graduate School of Bio-Agricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan.
authors.forename: Satoru
authors.initials: S
authors.lastname: Okamoto
authors.affiliation: Graduate School of Bio-Agricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan.
authors.forename: Ryo
authors.initials: R
authors.lastname: Tabata
authors.affiliation: Division of Biological Science, Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan. Electronic address: matsu@bio.nagoya-u.ac.jp.
authors.forename: Yoshikatsu
authors.initials: Y
authors.lastname: Matsubayashi
mesh_terms: D017360:Arabidopsis / Q000378:metabolism; D029681:Arabidopsis Proteins / Q000378:metabolism; D006706:Homeostasis; D010455:Peptides / Q000378:metabolism*; D010944:Plants / Q000378:metabolism*; D015398:Signal Transduction / Q000502:physiology; D052584:Xylem / Q000378:metabolism
chemical_list: D029681:Arabidopsis Proteins; D010455:Peptides