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Title: Tissue-specific clocks in Arabidopsis show asymmetric coupling
Authors: Endo, Motomu  kyouindb  KAKEN_id
Shimizu, Hanako
Nohales, Maria A.
Araki, Takashi  kyouindb  KAKEN_id  orcid (unconfirmed)
Kay, Steve A.
Author's alias: 遠藤, 求
Issue Date: 29-Oct-2014
Publisher: Nature Publishing Group
Journal title: Nature
Volume: 515
Issue: 7527
Start page: 419
End page: 422
Abstract: Many organisms rely on a circadian clock system to adapt to daily and seasonal environmental changes. The mammalian circadian clock consists of a central clock in the suprachiasmatic nucleus that has tightly coupled neurons and synchronizes other clocks in peripheral tissues1, 2. Plants also have a circadian clock, but plant circadian clock function has long been assumed to be uncoupled3. Only a few studies have been able to show weak, local coupling among cells4, 5, 6, 7. Here, by implementing two novel techniques, we have performed a comprehensive tissue-specific analysis of leaf tissues, and show that the vasculature and mesophyll clocks asymmetrically regulate each other in Arabidopsis. The circadian clock in the vasculature has characteristics distinct from other tissues, cycles robustly without environmental cues, and affects circadian clock regulation in other tissues. Furthermore, we found that vasculature-enriched genes that are rhythmically expressed are preferentially expressed in the evening, whereas rhythmic mesophyll-enriched genes tend to be expressed in the morning. Our results set the stage for a deeper understanding of how the vasculature circadian clock in plants regulates key physiological responses such as flowering time.
Description: 植物で組織ごとに異なる体内時計が働いていることを発見. 京都大学プレスリリース. 2014-10-30.
Rights: © 2014 Macmillan Publishers Limited.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
DOI(Published Version): 10.1038/nature13919
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