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MAA3 (MAGATAMA3) Helicase Gene is Required for Female Gametophyte Development and Pollen Tube Guidance in Arabidopsis thaliana

Shimizu, Kentaro K. ; Ito, Toshiro ; Ishiguro, Sumie ; Okada, Kiyotaka

In: Plant and Cell Physiology, 2008, vol. 49, no. 10, p. 1478-1483

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    Title
    • MAA3 (MAGATAMA3) Helicase Gene is Required for Female Gametophyte Development and Pollen Tube Guidance in Arabidopsis thaliana
    Author
    • Shimizu, Kentaro K.. Department of Botany, Graduate School of Science, Kyoto University, Kitashirakawa-oiwake, Sakyo, Kyoto, 606-8502 Japan
    • Ito, Toshiro. Department of Botany, Graduate School of Science, Kyoto University, Kitashirakawa-oiwake, Sakyo, Kyoto, 606-8502 Japan
    • Ishiguro, Sumie. Department of Botany, Graduate School of Science, Kyoto University, Kitashirakawa-oiwake, Sakyo, Kyoto, 606-8502 Japan
    • Okada, Kiyotaka. Department of Botany, Graduate School of Science, Kyoto University, Kitashirakawa-oiwake, Sakyo, Kyoto, 606-8502 Japan
    Document Type
    • Postprint
    Language
    • English
    Published in
    • Plant and Cell Physiology, 2008, vol. 49, no. 10, p. 1478-1483. Oxford University Press
    Other Version
    OAI-PMH Identifier
    • oai:doc.rero.ch:301243
    Summary
    The female gametophyte plays a central role in the sexual reproduction of angiosperms. We previously isolated the maa3 (magatama3) mutant of Arabidopsis thaliana, defective in development of the female gametophyte, micropylar pollen tube guidance, and preventing the attraction of multiple pollen tubes. We here observed that the nucleolus of polar nuclei is small, and that the fusion of polar nuclei often did not occur at the time of pollination. The MAA3 gene encodes a homolog of yeast Sen1 helicase, required for RNA metabolism. It is suggested that MAA3 may regulate RNA molecules responsible for nucleolar organization and pollen tube guidance