Mutations in the SGR4, SGR5 and SGR6 Loci of Arabidopsis thaliana Alter the Shoot Gravitropism

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概要

• 論文の詳細を見る

• Shoots of higher plants grow upward in response to gravity. To elucidate the molecular mechanism of this response, we have isolated shoot gravitropism (sgr) mutants in Arabidopsis thaliana. In this report, we describe three novel mutants, sgr4-1, sgr5-1 and sgr6-1 whose inflorescence sterns showed abnormal gravitropic responses as previously reported for sgr1, sgr2 and sgr3. These new sgr mutations were recessive and occurred at three independent genetic loci. The sgr4-1 mutant showed severe defect in gravitropism of both inflorescence stem and hypocotyl but were nomal in root gravitropism as were sgr1 and sgr2. The sgr5-1 and sgr6-1 mutants showed reduced gravitropism only in inflorescence stems but normal in both hypocotyls and roots as sgr3. These results support the hypothesis that some mechanisms of gravitropism are genetically different in these three organs in A. thaliana. In addition, these mutants showed normal phototropic responses, suggesting that SGR4. SGR5 and SGR6 genes are specifically involved in gravity perception and/or gravity signal transduction for the shoot gravitropic response.

• 日本植物生理学会の論文

著者

• Tasaka M

  Nagoya University Bio Science Center:(present Address)national Institute For Environmental Studies T

• Tamaoki Masanori

  Bioscience Center Nagoya Univ.

• Tasaka Masao

  Nara Inst. Of Sci. And Technol. Nara Jpn

• Tamaoki Masanori

  Department Of Life Science Aichi University Of Education

• Fujisawa Hisao

  Dep.of Botany Div.of Biological Science Graduate School Of Science Kyoto Univ.

• Fujisawa Hisao

  Department Of Botany Faculty Of Science Kyoto University

• Fujisawa Hisao

  Dept. Bot. Fac. Sci. Kyoto Univ.

• Fukaki Hidehiro

  Dep.of Botany Div.of Biological Science Graduate School Of Science Kyoto Univ.

• Fukaki Hidehiro

  Department Of Biology Faculty Of Science Kobe University

• TASAKA Masao

  Department of Botany, Faculty of Science, Kyoto University

• Yamauchi Yasuo

  Laboratory Of Plant Biotechnololgy Faculty Of Agriculture Tottori University

• Yamauchi Yoshiro

  Department of Botany, Division of Biological Science, Graduate School of Science, Kyoto University

• Yamauchi Yoshiro

  Department Of Botany Division Of Biological Science Graduate School Of Science Kyoto University

• Tasaka Masao

  Department Of Botany Faculty Of Science Kyoto University

• Tasaka Masao

  Dept. Bot. Fac. Sci. Kyoto Univ.

• Tasaka Masao

  Graduate School of Biological Sciences, Nara Institute of Science and Technology

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