Regulation of lateral root formation by auxin signaling in Arabidopsis

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概要

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• In higher plants, lateral root (LR) formation is a major contributor to root architecture in the soil. Although it is well known that auxin promotes LR formation, the molecular mechanisms that regulate auxin-mediated LR formation are still largely unknown. Recent molecular genetic studies using Arabidopsis mutants have shown that normal auxin signaling mediated by two families of transcriptional regulators, Aux/IAAs (Auxin/Indole-3-Acetic Acid; repressors of auxin-responsive transcription) and ARFs (Auxin Response Factor; activators or repressors of auxin-responsive transcription), is necessary for LR formation. Auxin-responsive transcription mediated by SLR/IAA14 and ARF7/ARF19 in the root pericycle is particularly important for LR initiation. This review summarizes what is known about the auxin signaling that regulates LR formation in Arabidopsis, and discusses the role of Aux/IAAs and ARFs for LR initiation and subsequent primordial development.

• 日本植物細胞分子生物学会の論文
• 2005-12-01

著者

• Tamaoki Masanori

  Bioscience Center Nagoya Univ.

• Tasaka Masao

  Nara Inst. Of Sci. And Technol. Nara Jpn

• Tasaka Masao

  Graduate School Of Biological Sciences Nara Institute Of Science And Technology

• Tamaoki Masanori

  Department Of Life Science Aichi University Of Education

• Fukaki Hidehiro

  Graduate School Of Biol. Sci. Nara Institute Of Sci. & Tech.

• Fukaki Hidehiro

  Department Of Biology Faculty Of Science Kobe University

• Tasaka Masao

  Graduate School Of Biol. Sci.

• Okushima Yoko

  Graduate School Of Biological Sciences Nara Institute Of Science And Technology

• 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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