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The B-box family gene STO (BBX24) in Arabidopsis thaliana regulates flowering time in different pathways

Li, Feng ; Sun, Jinjing ; Wang, Donghui ; Bai, Shunong ; Clarke, Adrian K ; Holm, Magnus He, Yuehui

PloS one, 2014-02, Vol.9 (2), p.e87544 [Periódico revisado por pares]

United States: Public Library of Science

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Título:
The B-box family gene STO (BBX24) in Arabidopsis thaliana regulates flowering time in different pathways
Autor: Li, Feng ; Sun, Jinjing ; Wang, Donghui ; Bai, Shunong ; Clarke, Adrian K ; Holm, Magnus
He, Yuehui
Assuntos: Arabidopsis ; Arabidopsis Proteins - genetics ; Arabidopsis thaliana ; ATES OF AMERICA ; Biology ; Breeding success ; CIRCADIAN CLOCK ; Circadian Clocks - genetics ; Circadian rhythm ; Circadian rhythms ; Clock gene ; CLOCK protein ; CONSTANS-LIKE GENE ; DNA-Binding Proteins - genetics ; Downstream effects ; Engineering ; Environmental factors ; Environmental science ; Environmental Sciences ; FLORAL-INDUCTION ; Flowering ; Flowers ; Flowers & plants ; Flowers - genetics ; Gene expression ; Gene Expression Regulation, Plant - drug effects ; Gene Expression Regulation, Plant - genetics ; Gene Expression Regulation, Plant - radiation effects ; Genes ; Genetic research ; Genotype ; Germination ; Gibberellins ; Growth conditions ; Laboratories ; Life sciences ; LOCUS-C ; MADS DOMAIN PROTEIN ; MADS Domain Proteins - genetics ; Miljövetenskap ; Molecular biology ; Mutants ; Mutation ; Overexpression ; P11661 ; P411 ; Pathways ; Period Circadian Proteins - genetics ; Photoperiod ; Plant Growth Regulators - pharmacology ; PLANTS ; Proteins ; Repressor Proteins - genetics ; Reproduction ; Reverse Transcriptase Polymerase Chain Reaction ; SALT TOLERANCE ; Seed germination ; Signal Transduction - genetics ; SIGNALS ; Time Factors ; TRANSCRIPTION FACTORS ; Transcription Factors - genetics ; V105 ; V106 ; VERNALIZATION ; Zinc ; Zinc compounds
É parte de: PloS one, 2014-02, Vol.9 (2), p.e87544
Notas: Competing Interests: The authors have declared that no competing interests exist.
Conceived and designed the experiments: FL MH. Performed the experiments: FL JS DW SB. Analyzed the data: FL JS DW SB AKC MH. Contributed reagents/materials/analysis tools: MH. Wrote the paper: FL AKC.
Descrição: Flowering at the appropriate time is crucial for reproductive success and is strongly influenced by various pathways such as photoperiod, circadian clock, FRIGIDA and vernalization. Although each separate pathway has been extensively studied, much less is known about the interactions between them. In this study we have investigated the relationship between the photoperiod/circadian clock gene and FRIGIDA/FLC by characterizing the function of the B-box STO gene family. STO has two B-box Zn-finger domains but lacks the CCT domain. Its expression is controlled by circadian rhythm and is affected by environmental factors and phytohormones. Loss and gain of function mutants show diversiform phenotypes from seed germination to flowering. The sto-1 mutant flowers later than the wild type (WT) under short day growth conditions, while over-expression of STO causes early flowering both in long and short days. STO over-expression not only reduces FLC expression level but it also activates FT and SOC1 expression. It also does not rely on the other B-box gene CO or change the circadian clock system to activate FT and SOC1. Furthermore, the STO activation of FT and SOC1 expression is independent of the repression of FLC; rather STO and FLC compete with each other to regulate downstream genes. Our results indicate that photoperiod and the circadian clock pathway gene STO can affect the key flowering time genes FLC and FT/SOC1 separately, and reveals a novel perspective to the mechanism of flowering regulation.
Editor: United States: Public Library of Science
Idioma: Inglês

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The B-box family gene STO (BBX24) in Arabidopsis thaliana regulates flowering time in different pathways

Li, Feng ; Sun, Jinjing ; Wang, Donghui ; Bai, Shunong ; Clarke, Adrian K ; Holm, Magnus He, Yuehui

United States: Public Library of Science

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