Comprehensive Comparison of Auxin-Regulated and Brassinosteroid-Regulated Genes in Arabidopsis

• Hideki Goda

  Plant Science Center, RIKEN, Suehirocho, Tsurumi, Yokohama, Kanagawa 230–0045, Japan (H.G., Y.S., S.Y.); Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113–0033, Japan (S.S.); and Plant Functions Laboratory, RIKEN, Hirosawa, Wako, Saitama 351–0198, Japan (T.A., S.F., S.Y.)

• Shinichiro Sawa

  Plant Science Center, RIKEN, Suehirocho, Tsurumi, Yokohama, Kanagawa 230–0045, Japan (H.G., Y.S., S.Y.); Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113–0033, Japan (S.S.); and Plant Functions Laboratory, RIKEN, Hirosawa, Wako, Saitama 351–0198, Japan (T.A., S.F., S.Y.)

• Tadao Asami

  Plant Science Center, RIKEN, Suehirocho, Tsurumi, Yokohama, Kanagawa 230–0045, Japan (H.G., Y.S., S.Y.); Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113–0033, Japan (S.S.); and Plant Functions Laboratory, RIKEN, Hirosawa, Wako, Saitama 351–0198, Japan (T.A., S.F., S.Y.)

• Shozo Fujioka

  Plant Science Center, RIKEN, Suehirocho, Tsurumi, Yokohama, Kanagawa 230–0045, Japan (H.G., Y.S., S.Y.); Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113–0033, Japan (S.S.); and Plant Functions Laboratory, RIKEN, Hirosawa, Wako, Saitama 351–0198, Japan (T.A., S.F., S.Y.)

• Yukihisa Shimada

  Plant Science Center, RIKEN, Suehirocho, Tsurumi, Yokohama, Kanagawa 230–0045, Japan (H.G., Y.S., S.Y.); Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113–0033, Japan (S.S.); and Plant Functions Laboratory, RIKEN, Hirosawa, Wako, Saitama 351–0198, Japan (T.A., S.F., S.Y.)

• Shigeo Yoshida

  Plant Science Center, RIKEN, Suehirocho, Tsurumi, Yokohama, Kanagawa 230–0045, Japan (H.G., Y.S., S.Y.); Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113–0033, Japan (S.S.); and Plant Functions Laboratory, RIKEN, Hirosawa, Wako, Saitama 351–0198, Japan (T.A., S.F., S.Y.)

抄録

Although numerous physiological studies have addressed the interactions between brassinosteroids and auxins, little is known about the underlying molecular mechanisms. Using an Affymetrix GeneChip representing approximately 8,300 Arabidopsis genes, we studied comprehensive transcript profiles over 24 h in response to indole-3-acetic acid (IAA) and brassinolide (BL). We identified 409 genes as BL inducible, 276 genes as IAA inducible, and 637 genes in total. These two hormones regulated only 48 genes in common, suggesting that most of the actions of each hormone are mediated by gene expression that is unique to each. IAA-up-regulated genes were enriched in genes regulated in common. They were induced quickly by IAA and more slowly by BL, suggesting divergent physiological roles. Many were early auxin-inducible genes and their homologs, namely SAUR, GH3, and IAA. The comprehensive comparison also identified IAA- and BL-specific genes, which should help to elucidate the specific actions of each hormone. The identified genes were classified using hierarchical clustering based on the similarity of their responses to the two hormones. Gene classification also allowed us to analyze the frequency of cis-elements. The TGTCTC element, a core element of the previously reported auxin response element, was not enriched in genes specifically regulated by IAA but was enriched in the 5′-flanking region of genes up-regulated by both IAA and BL. Such gene classification should be useful for predicting the functions of unknown genes, to understand the roles of these two hormones, and the promoter analysis should provide insight into the interaction of transcriptional regulation by the two hormones.

収録刊行物

• Plant Physiology

  Plant Physiology 134 (4), 1555-1573, 2004-04-01

  Oxford University Press (OUP)

キーワード

• Plant Science
• Genetics
• Physiology

詳細情報

• CRID: 1363670318703443072
• NII論文ID: 80016635445
• DOI: 10.1104/pp.103.034736
• ISSN: 15322548
• ISSN: 00320889
• Web Site: http://academic.oup.com/plphys/article-pdf/134/4/1555/38701702/plphys_v134_4_1555.pdf
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