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  1. Article ; Online: Group C MAP kinases phosphorylate MBD10 to regulate ABA-induced leaf senescence in Arabidopsis.

    Li, Yangdan / Kamiyama, Yoshiaki / Minegishi, Fuko / Tamura, Yuki / Yamashita, Kota / Katagiri, Sotaro / Takase, Hinano / Otani, Masahiko / Tojo, Ryo / Rupp, Gabrielle E / Suzuki, Takamasa / Kawakami, Naoto / Peck, Scott C / Umezawa, Taishi

    The Plant journal : for cell and molecular biology

    2024  

    Abstract: Abscisic acid (ABA) is a phytohormone that promotes leaf senescence in response to environmental stress. We previously identified methyl CpG-binding domain 10 (MBD10) as a phosphoprotein that becomes differentially phosphorylated after ABA treatment in ... ...

    Abstract Abscisic acid (ABA) is a phytohormone that promotes leaf senescence in response to environmental stress. We previously identified methyl CpG-binding domain 10 (MBD10) as a phosphoprotein that becomes differentially phosphorylated after ABA treatment in Arabidopsis. ABA-induced leaf senescence was delayed in mbd10 knockout plants but accelerated in MBD10-overexpressing plants, suggesting that MBD10 positively regulates ABA-induced leaf senescence. ABA-induced phosphorylation of MBD10 occurs in planta on Thr-89, and our results demonstrated that Thr-89 phosphorylation is essential for MBD10's function in leaf senescence. The in vivo phosphorylation of Thr-89 in MBD10 was significantly downregulated in a quadruple mutant of group C MAPKs (mpk1/2/7/14), and group C MAPKs directly phosphorylated MBD10 in vitro. Furthermore, mpk1/2/7/14 showed a similar phenotype as seen in mbd10 for ABA-induced leaf senescence, suggesting that group C MAPKs are the cognate kinases of MBD10 for Thr-89. Because group C MAPKs have been reported to function downstream of SnRK2s, our results indicate that group C MAPKs and MBD10 constitute a regulatory pathway for ABA-induced leaf senescence.
    Language English
    Publishing date 2024-03-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 1088037-9
    ISSN 1365-313X ; 0960-7412
    ISSN (online) 1365-313X
    ISSN 0960-7412
    DOI 10.1111/tpj.16706
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Arabidopsis

    Kamiyama, Yoshiaki / Hirotani, Misaki / Ishikawa, Shinnosuke / Minegishi, Fuko / Katagiri, Sotaro / Rogan, Conner J / Takahashi, Fuminori / Nomoto, Mika / Ishikawa, Kazuya / Kodama, Yutaka / Tada, Yasuomi / Takezawa, Daisuke / Anderson, Jeffrey C / Peck, Scott C / Shinozaki, Kazuo / Umezawa, Taishi

    Proceedings of the National Academy of Sciences of the United States of America

    2021  Volume 118, Issue 30

    Abstract: The phytohormone abscisic acid (ABA) plays a major role in abiotic stress responses in plants, and subclass III SNF1-related protein kinase 2 (SnRK2) kinases mediate ABA signaling. In this study, we identified Raf36, a group C Raf-like protein kinase ... ...

    Abstract The phytohormone abscisic acid (ABA) plays a major role in abiotic stress responses in plants, and subclass III SNF1-related protein kinase 2 (SnRK2) kinases mediate ABA signaling. In this study, we identified Raf36, a group C Raf-like protein kinase in
    MeSH term(s) Abscisic Acid/pharmacology ; Arabidopsis/genetics ; Arabidopsis/growth & development ; Arabidopsis/metabolism ; Arabidopsis Proteins/genetics ; Arabidopsis Proteins/metabolism ; Gene Expression Regulation, Plant/drug effects ; Phosphorylation ; Plant Growth Regulators/pharmacology ; Protein Serine-Threonine Kinases/genetics ; Protein Serine-Threonine Kinases/metabolism ; Signal Transduction ; Stress, Physiological
    Chemical Substances Arabidopsis Proteins ; Plant Growth Regulators ; SnRK2 protein, Arabidopsis ; Abscisic Acid (72S9A8J5GW) ; Protein Serine-Threonine Kinases (EC 2.7.11.1)
    Language English
    Publishing date 2021-06-18
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 209104-5
    ISSN 1091-6490 ; 0027-8424
    ISSN (online) 1091-6490
    ISSN 0027-8424
    DOI 10.1073/pnas.2100073118
    Database MEDical Literature Analysis and Retrieval System OnLINE

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