POM2/CSI1 is essential for functional association of cellulose synthase and 
microtubules in Arabidopsis

Bringmann, M.; Li, E.; Sampathkumar, A.; Kocabek, T.; Hauser, M.-T.; Persson, S.

doi:10.​1105/​tpc.​111.​093575

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学術論文

POM2/CSI1 is essential for functional association of cellulose synthase and microtubules in Arabidopsis

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Bringmann, M.
Plant Cell Walls - Persson, Max Planck Research Groups, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;

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Sampathkumar, A.
Plant Cell Walls - Persson, Max Planck Research Groups, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;

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Persson, S.
Plant Cell Walls - Persson, Max Planck Research Groups, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;

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Bringmann-2012-POM2_CSI1 is essenti.pdf
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引用

Bringmann, M., Li, E., Sampathkumar, A., Kocabek, T., Hauser, M.-T., & Persson, S. (2012). POM2/CSI1 is essential for functional association of cellulose synthase and microtubules in Arabidopsis. The Plant Cell, 24(1), 163-177. doi:10.1105/tpc.111.093575.

引用: https://hdl.handle.net/11858/00-001M-0000-0014-2033-C

要旨

In plants, regulation of cellulose synthesis is fundamental for morphogenesis and plant growth. Cellulose is synthesized at the plasma membrane, and the orientation of synthesis is guided by cortical microtubules; however, the guiding mechanism is currently unknown. We show that the conditional root elongation pom2 mutants are impaired in cell elongation, fertility, and microtubule-related functions. Map-based cloning of the POM-POM2 locus revealed that it is allelic to CELLULOSE SYNTHASE INTERACTING1 (CSI1). Fluorescently tagged POM2/CSI1s associated with both plasma membrane-located cellulose synthases (CESAs) and post-Golgi CESA-containing compartments. Interestingly, while CESA insertions coincided with cortical microtubules in the pom2/csi1 mutants, the microtubule-defined movement of the CESAs was significantly reduced in the mutant. We propose that POM2/CSI1 provides a scaffold between the CESAs and cortical microtubules that guide cellulose synthesis.