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A Munc13-like protein in Arabidopsis mediates H+-ATPase translocation that is essential for stomatal responses

Author

Listed:
  • Mimi Hashimoto-Sugimoto

    (Faculty of Sciences, Kyushu University)

  • Takumi Higaki

    (Graduate School of Frontier Sciences, The University of Tokyo
    Japan Science and Technology Agency (JST))

  • Takashi Yaeno

    (Plant Science Center, RIKEN)

  • Ayako Nagami

    (Faculty of Sciences, Kyushu University)

  • Mari Irie

    (Faculty of Sciences, Kyushu University)

  • Miho Fujimi

    (Faculty of Sciences, Kyushu University)

  • Megumi Miyamoto

    (Faculty of Sciences, Kyushu University)

  • Kae Akita

    (Graduate School of Frontier Sciences, The University of Tokyo)

  • Juntaro Negi

    (Faculty of Sciences, Kyushu University)

  • Ken Shirasu

    (Plant Science Center, RIKEN)

  • Seiichiro Hasezawa

    (Graduate School of Frontier Sciences, The University of Tokyo
    Japan Science and Technology Agency (JST))

  • Koh Iba

    (Faculty of Sciences, Kyushu University)

Abstract

Plants control CO2 uptake and water loss by modulating the aperture of stomata located in the epidermis. Stomatal opening is initiated by the activation of H+-ATPases in the guard-cell plasma membrane. In contrast to regulation of H+-ATPase activity, little is known about the translocation of the guard cell H+-ATPase to the plasma membrane. Here we describe the isolation of an Arabidopsis gene, PATROL1, that controls the translocation of a major H+-ATPase, AHA1, to the plasma membrane. PATROL1 encodes a protein with a MUN domain, known to mediate synaptic priming in neuronal exocytosis in animals. Environmental stimuli change the localization of plasma membrane-associated PATROL1 to an intracellular compartment. Plasma membrane localization of AHA1 and stomatal opening require the association of PATROL1 with AHA1. Increased stomatal opening responses in plants overexpressing PATROL1 enhance the CO2 assimilation rate, promoting plant growth.

Suggested Citation

  • Mimi Hashimoto-Sugimoto & Takumi Higaki & Takashi Yaeno & Ayako Nagami & Mari Irie & Miho Fujimi & Megumi Miyamoto & Kae Akita & Juntaro Negi & Ken Shirasu & Seiichiro Hasezawa & Koh Iba, 2013. "A Munc13-like protein in Arabidopsis mediates H+-ATPase translocation that is essential for stomatal responses," Nature Communications, Nature, vol. 4(1), pages 1-9, October.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3215
    DOI: 10.1038/ncomms3215
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