Clock-Controlled and FLOWERING LOCUS T (FT)-Dependent Photoperiodic Pathway in Lotus japonicus(2)Characterization of a MicroRNA Implicated in the Control of Flowering Time
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- YAMASHINO Takafumi
- Laboratory of Molecular and Functional Genomics, School of Agriculture, Nagoya University
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- YAMAWAKI Saori
- Laboratory of Molecular and Functional Genomics, School of Agriculture, Nagoya University
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- HAGUI Emi
- Laboratory of Molecular and Functional Genomics, School of Agriculture, Nagoya University
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- ISHIDA Kai
- Laboratory of Molecular and Functional Genomics, School of Agriculture, Nagoya University
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- UEOKA-NAKANISHI Hanayo
- Laboratory of Molecular and Functional Genomics, School of Agriculture, Nagoya University
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- NAKAMICHI Norihito
- Laboratory of Molecular and Functional Genomics, School of Agriculture, Nagoya University
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- MIZUNO Takeshi
- Laboratory of Molecular and Functional Genomics, School of Agriculture, Nagoya University
書誌事項
- タイトル別名
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- Clock-Controlled and FLOWERING LOCUS T (FT)-Dependent Photoperiodic Pathway in <i>Lotus japonicus</i> II: Characterization of a MicroRNA Implicated in the Control of Flowering Time
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Plant circadian clock generates rhythms with a period close to 24 h, and it controls a wide variety of physiological and developmental events, including the transition to reproductive growth (or flowering). During the last decade, significant research progress in Arabidopsis thaliana has been made in defining the molecular mechanism by which the circadian clock regulates flowering time in response to changes in photoperiod. In Lotus japonicus, we have found that LjFTa, which encodes a ortholog of the Arabidopsis FLOWERING LOCUS T (FT), plays an important role in the promotion of flowering, but it is not clear how the expression of LjFTa is regulated in L. japonicus. Based on current knownledge of photoperiodic control of flowering time in A. thaliana, here we examined whether a microRNA is involved in the activation of LjFTa in L. japonicus. Two putative L. japonicus genes that are responsible for the production of miR172 (designated LjmiR172a and LjmiR172b) were cloned. Overexpression of LjmiR172a/b in A. thaliana resulted in markedly accelerated flowering through enhancement of the expression of FT, concomitantly reducing the expression level of TARGET OF EARLY ACTIVATION TAGGED 1 (TOE1) transcripts, the protein product of which functions as a transcriptional repressor of FT. These results suggest that LjmiR172 genes play a positive role in the LjFTa-mediated promotion of flowering in L. japonicus.
収録刊行物
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- Bioscience, Biotechnology, and Biochemistry
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Bioscience, Biotechnology, and Biochemistry 77 (6), 1179-1185, 2013
公益社団法人 日本農芸化学会
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詳細情報 詳細情報について
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- CRID
- 1390282681456550144
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- NII論文ID
- 10031184678
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- NII書誌ID
- AA10824164
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- COI
- 1:STN:280:DC%2BC3sjhtFWguw%3D%3D
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- ISSN
- 13476947
- 09168451
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- NDL書誌ID
- 024646872
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- PubMed
- 23748785
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可