title: A proteomic approach to analyze auxin- and zinc-responsive protein in rice.
abstract: Auxin and zinc are involved in callus and root formation in rice. However, details of the mechanism underlying this process and functional relation between zinc and auxin are unclear. In this study, proteins induced by auxin and zinc in rice were analyzed by a proteomic approach. Root formation on rice seedlings was promoted by 0.45 microM 2,4-D treatment and was further promoted by addition of 260 microM Zn. Microscopic observation revealed that the number of root primodia formed was significantly increased in 2,4-D- and Zn-treated seedlings than that of the control. A total of seven proteins, as analyzed by 2D-PAGE, were increased, and one protein was decreased by 2,4-D and Zn treatment. Expression of elongation factor-1beta' (EF-1beta') both at transcriptional and translational levels was particular abundant in callus and basal parts of young seedlings, and the accumulation of EF-1beta' was consistent with root formation induced by 2,4-D and Zn. Results indicate that higher level of EF-1beta' expression is necessary for auxin- and zinc-induced root formation in rice.
authors.affiliation: National Institute of Agrobiological Sciences, Tsukuba, 305-8602, Japan, and Faculty of Agriculture, Miyazaki University, Miyazaki, 889-2192, Japan.
authors.forename: Guangxiao
authors.initials: G
authors.lastname: Yang
authors.forename: Akihiko
authors.initials: A
authors.lastname: Inoue
authors.forename: Hironori
authors.initials: H
authors.lastname: Takasaki
authors.forename: Hisatoshi
authors.initials: H
authors.lastname: Kaku
authors.forename: Shoichiro
authors.initials: S
authors.lastname: Akao
authors.forename: Setsuko
authors.initials: S
authors.lastname: Komatsu
mesh_terms: D015084:2,4-Dichlorophenoxyacetic Acid / Q000494:pharmacology; D000595:Amino Acid Sequence; D001483:Base Sequence; D017931:DNA Primers; D015180:Electrophoresis, Gel, Two-Dimensional; D015870:Gene Expression; D007210:Indoleacetic Acids / Q000378:metabolism*; D012275:Oryza / Q000235:genetics / Q000378:metabolism*; D010449:Peptide Mapping; D010940:Plant Proteins / Q000737:chemistry / Q000378:metabolism; D020543:Proteome; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D015032:Zinc / Q000378:metabolism*
chemical_list: D017931:DNA Primers; D007210:Indoleacetic Acids; D010940:Plant Proteins; D020543:Proteome; D015084:2,4-Dichlorophenoxyacetic Acid; D015032:Zinc