CONSTANS and the evolutionary origin of photoperiodic timing of flowering

Valverde, Federico

doi:10.1093/jxb/erq449

Cited by 164 publications

(148 citation statements)

References 91 publications

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“…2). Notably, members of the CO-like gene family have been shown to play important roles in the photoperiodic regulation of flowering in many plant species and are conserved between monocots and dicots (41,42). There are 17 and 19 CO-like genes in the Arabidopsis and rice genomes, respectively (41) (SI Appendix, Fig.…”

Section: Discussionmentioning

confidence: 99%

Association of functional nucleotide polymorphisms at DTH2 with the northward expansion of rice cultivation in Asia

Zheng

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

173

149

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Flowering time (i.e., heading date in crops) is an important ecological trait that determines growing seasons and regional adaptability of plants to specific natural environments. Rice (Oryza sativa L.) is a short-day plant that originated in the tropics. Increasing evidence suggests that the northward expansion of cultivated rice was accompanied by human selection of the heading date under noninductive long-day (LD) conditions. We report here the molecular cloning and characterization of DTH2 (for Days to heading on chromosome 2), a minor-effect quantitative trait locus that promotes heading under LD conditions. We show that DTH2 encodes a CONSTANS-like protein that promotes heading by inducing the florigen genes Heading date 3a and RICE FLOWERING LOCUS T 1, and it acts independently of the known floral integrators Heading date 1 and Early heading date 1. Moreover, association analysis and transgenic experiments identified two functional nucleotide polymorphisms in DTH2 that correlated with early heading and increased reproductive fitness under natural LD conditions in northern Asia. Our combined population genetics and network analyses suggest that DTH2 likely represents a target of human selection for adaptation to LD conditions during rice domestication and/or improvement, demonstrating an important role of minor-effect quantitative trait loci in crop adaptation and breeding.

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Section: Discussionmentioning

confidence: 99%

Association of functional nucleotide polymorphisms at DTH2 with the northward expansion of rice cultivation in Asia

Zheng

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

173

149

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“…Group II contains B-box1, a less conserved or diverged B-box2 and CCT domain but lacks the VP motif while Group III contains B-box 1 and CCT domain only (Gangappa and Botto 2014;Zhang et al 2015). In a broader way COL proteins are a part of the BBX family transcription factors with diverse functions (Almada et al 2009;Chia et al 2008;Crocco and Botto 2013;Datta et al 2006;Huang et al 2012;Valverde 2011). The characterization and analysis of Group I CO genes has been carried out in many plant species and these cluster with Arabidopsis CO and rice Hd1 (Gangappa and Botto 2014;Griffiths et al 2003;Huang et al 2012;Zhang et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Molecular characterization of CONSTANS-Like (COL) genes in banana (Musa acuminata L. AAA Group, cv. Grand Nain)

Chaurasia

Patil²,

Azeez³

et al. 2016

Physiol Mol Biol Plants

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The CONSTANS (CO) family is an important regulator of flowering in photoperiod sensitive plants. But information regarding their role in day neutral plants is limited. We report identification of nine Group I type CONSTANS-like (COL) genes of banana and their characterization for their age dependent, diurnal and tissue-specific expression. Our studies show that the Group I genes are conserved in structure to members in other plants. Expression of these genes shows a distinct circadian regulation with a peak during light period. Developmental stage specific expression reveals high level transcript accumulation of two genes, MaCOL3a and MaCOL3b, well before flowering and until the initiation of flowering. A decrease in their transcript levels after initiation of flowering is followed by an increase in transcription of other members that coincides with the continued development of the inflorescence and fruiting. CO binding cis-elements are observed in at least three FT-like genes in banana suggesting possible CO-FT interactions that might regulate flowering. Distinct tissue specific expression patterns are observed for different family members in mature leaves, apical inflorescence, bracts, fruit skin and fruit pulp suggesting possible roles other than flowering. This is the first exhaustive study of the COL genes belonging to Group I of banana.

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“…By reverse genetics, we have identified candidate genes to regulators of shade-avoidance responses; ATHB2 orthologs (Ciarbelli et al 2008), photomorphogenesis and seedling establishment; FHY3/FAR1, NDPK2, PIF/PIL family, PP7, RAP1/ ATMYC2, RFI2 (Shen et al 2005;Yadav et al 2005;Chen and Ni 2006;Lin et al 2007;Genoud et al 2008;Leivar et al 2008), light-regulated proteolysis; COP1, EID1, LAF1, SPA1 (Yi and Deng 2005;Marrocco et al 2006;Yang et al 2009;Chen et al 2010;Fankhauser and Ulm 2011) and developmental transitions; CO, PFT1 (Suárez-López et al 2001;Cerdán and Chory 2003) (Table S2). Using the obtained sequence information in a reverse genetics approach, we have identified a novel petunia mutant carrying a mutation in CCT (CO, CO-like, TOC1) domain (Strayer et al 2000;Valverde 2011). In Arabidopsis, the CONSTANS family of zinc finger proteins acts between the circadian clock and genes controlling meristem identity in the photoperiodic flowering pathway (Turck et al 2008).…”

Section: Discussionmentioning

confidence: 99%

A reverse genetics approach identifies novel mutants in light responses and anthocyanin metabolism in petunia

Berenschot

Quecini

2013

Physiol Mol Biol Plants

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Flower color and plant architecture are important commercially valuable features for ornamental petunias (Petunia x hybrida Vilm.). Photoperception and light signaling are the major environmental factors controlling anthocyanin and chlorophyll biosynthesis and shadeavoidance responses in higher plants. The genetic regulators of these processes were investigated in petunia by in silico analyses and the sequence information was used to devise a reverse genetics approach to probe mutant populations. Petunia orthologs of photoreceptor, light-signaling components and anthocyanin metabolism genes were identified and investigated for functional conservation by phylogenetic and protein motif analyses. The expression profiles of photoreceptor gene families and of transcription factors regulating anthocyanin biosynthesis were obtained by bioinformatic tools. Two mutant populations, generated by an alkalyting agent and by gamma irradiation, were screened using a phenotype-independent, sequence-based method by high-throughput PCR-based assay. The strategy allowed the identification of novel mutant alleles for anthocyanin biosynthesis (CHALCONE SYNTHASE ) and regulation (PH4), and for light signaling (CONSTANS ) genes.

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CONSTANS and the evolutionary origin of photoperiodic timing of flowering

Cited by 164 publications

References 91 publications

Association of functional nucleotide polymorphisms at DTH2 with the northward expansion of rice cultivation in Asia

Association of functional nucleotide polymorphisms at DTH2 with the northward expansion of rice cultivation in Asia

Molecular characterization of CONSTANS-Like (COL) genes in banana (Musa acuminata L. AAA Group, cv. Grand Nain)

A reverse genetics approach identifies novel mutants in light responses and anthocyanin metabolism in petunia

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