title: Temperature regulates tuber-inducing lipoxygenase-derived metabolites in potato (Solanum tuberosum).
abstract: Temperature is one of the major environmental factors affecting potato tuberization. It has been suggested that lipoxygenase (LOX) mediates between temperature and tuber induction. In this study, the contents of the LOX-derived metabolites hydroperoxylinolenic acid (HPOT), jasmonic acid (JA), tuberonic acid (TA) and tuberonic acid glucoside (TAG) were analyzed in leaves of potatoes growing at different temperatures. At low, tuber-inducing temperature, endogenous levels of JA, TA and TAG rise, indicating their crucial role in tuber induction. The concentration of 13(S)-HPOT seems not to be directly affected by temperature. Instead, the molecule has only a short half-life in leaves and is readily metabolized.
authors.affiliation: Laboratory of Bio-organic Chemistry, Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University, Kita 9, Nishi 9, Kitaku, Sapporo 060-8589, Japan.
authors.forename: Kyong-Hee
authors.initials: KH
authors.lastname: Nam
authors.forename: Fanjiang
authors.initials: F
authors.lastname: Kong
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Matsuura
authors.forename: Kosaku
authors.initials: K
authors.lastname: Takahashi
authors.forename: Kensuke
authors.initials: K
authors.lastname: Nabeta
authors.forename: Teruhiko
authors.initials: T
authors.lastname: Yoshihara
mesh_terms: D004790:Enzyme Induction; D008084:Lipoxygenase / Q000096:biosynthesis* / Q000378:metabolism; D011198:Solanum tuberosum / Q000201:enzymology*; D013696:Temperature
chemical_list: D008084:Lipoxygenase