References of "Périlleux, Claire"
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See detailGenetic control of flowering time in maize
Périlleux, Claire ULiege; Colasanti, J.; Irish, E.

in Prioul, J.-L.; Thévenot, C.; Molnar, T. (Eds.) Advances in Maize (2011)

Flowering in temperate maize occurs largely autonomously after the plant has accumulated a given amount of vegetative growth. Mutants affected in leaf initiation rate or in phyllotaxy however indicate ... [more ▼]

Flowering in temperate maize occurs largely autonomously after the plant has accumulated a given amount of vegetative growth. Mutants affected in leaf initiation rate or in phyllotaxy however indicate that total leaf number can vary independently of flowering time, e.g. in relation with cytokinin signalling. By contrast, heterochronic mutants in which juvenile-to-adult and/or adult vegetative-to-reproductive phase changes are abnormal aided in the identification of key regulators of endogenous developmental timing in maize. These regulators include gibberellins and micro-RNAs, such as miR156 and miR172, which have been identified more recently. Progress towards unravelling the maize flowering time genetic network is also emerging from comparison with other species. Although maize expansion beyond domestication centres implied reduction in photoperiod sensitivity, molecular genetic studies indicated conservation of genes which, in Arabidopsis or rice, act in a signalling cascade whereby flowering is controlled by photoperiod. Several gene sequences are now available to assess functionality of such a pathway in maize and evaluate its contribution to flowering time control. [less ▲]

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See detailTranscriptomic analysis of Arabidopsis roots during flowering
D'Aloia, Maria ULiege; Tocquin, Pierre ULiege; Périlleux, Claire ULiege

Poster (2010, February)

Contribution of the root system to the flowering process remains poorly studied. Part of the problem resides in its difficult isolation from the substrate, especially on adult plants. Taking advantage of ... [more ▼]

Contribution of the root system to the flowering process remains poorly studied. Part of the problem resides in its difficult isolation from the substrate, especially on adult plants. Taking advantage of an hydroponic device that allows synchronous growth and flowering of Arabidopsis thaliana (Tocquin et al., 2003), we performed global transcript profiling of roots during induction of flowering by a single long day (LD). Results were validated by real-time RT-PCR, and the expression patterns of selected probes were further analyzed in shoots and roots. Some of the genes that were identified in the microarray experiment were already known to be involved in the photoperiodic pathway of flowering in Arabidopsis, and hence were activated in both roots and shoots during the LD. These genes include, for example, components of light signaling or circadian machinery (e.g. GIGANTEA). Other genes providing new insights into the control of flowering at the whole plant level will be presented. Tocquin et al., (2003). BMC Plant Biology, 3: 2. [less ▲]

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See detailPhysiologie végétale - BAC3 Bio
Périlleux, Claire ULiege

Learning material (2010)

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See detailBiologie du développement - partim. végétal / Master 1 BBMC
Périlleux, Claire ULiege

Learning material (2010)

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See detailL'évolution des plantes cultivées: une histoire peu naturelle ... de la domestication aux OGM
Périlleux, Claire ULiege

Conference given outside the academic context (2009)

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See detailPartenariat F.N.P.S.M.S. - ULg / Rapport ULg 2008
Périlleux, Claire ULiege; Van Kerkhoven, Fabrizio; Gonzalez, Arnaud ULiege

Report (2009)

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See detailFunctional analysis of an FLC-LIKE gene in root chicory
Périlleux, Claire ULiege; Pieltain, Alexandra ULiege; D'Aloia, Maria ULiege et al

in Comparative Biochemistry and Physiology. Part A, Physiology (2009), 153A(2/Suppl.), 198-199

Vernalization is known to promote flowering in Arabidopsis thaliana by inhibiting the expression of a strong repressor: FLOWERING LOCUS C (FLC). The recent cloning of an FLC-LIKE gene in sugar beet (Beta ... [more ▼]

Vernalization is known to promote flowering in Arabidopsis thaliana by inhibiting the expression of a strong repressor: FLOWERING LOCUS C (FLC). The recent cloning of an FLC-LIKE gene in sugar beet (Beta vulgaris; BvFL1) and – here – in root chicory (Cichorium intybus; CiFL1) suggests the conservation of FLC biological function during evolution of eudicots. Hence physiological questions that remain difficult to address in Arabidopsis can be studied in other species. We investigated the correlation between CiFL1 expression and plant-age dependent responsiveness to vernalization. We also studied the effect of post-vernalization growing temperature, which can stabilize or erase the vernalized state. [less ▲]

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See detailGene activation cascade triggered by a single photoperiodic cycle inducing flowering in Sinapis alba
D'Aloia, Maria ULiege; Tamseddak, Karim; Bonhomme, Delphine ULiege et al

in The Plant Journal (2009), 59

Molecular genetic analyses in Arabidopsis disclosed a genetic pathway whereby flowering is induced by the photoperiod. This cascade is examined here within the time course of floral transition in the long ... [more ▼]

Molecular genetic analyses in Arabidopsis disclosed a genetic pathway whereby flowering is induced by the photoperiod. This cascade is examined here within the time course of floral transition in the long-day (LD) plant Sinapis alba induced by a single photoperiodic cycle. In addition to previously available sequences, the cloning of CONSTANS (SaCO) and FLOWERING LOCUS T (SaFT) homologues allowed expression analyses to be performed to follow the flowering process step by step. A diurnal rhythm in SaCO expression in the leaves was observed and transcripts of SaFT were detected when light was given in phase with SaCO kinetics only. This occurred when day length was extended or when a short day was shifted towards a ‘photophile phase’. The steady-state level of SaFT transcripts in the various physiological situations examined was found to correlate like a rheostat with floral induction strength. Kinetics of SaFT activation were also consistent with previous estimations of translocation of florigen out of leaves, which could actually occur after the inductive cycle. In response to one 22-h LD, initiation of floral meristems by the shoot apical meristem (SAM) started about 2 days after activation of SaFT and was marked by expression of APETALA1 (SaAP1). Meanwhile, LEAFY (SaLFY) was first up-regulated in leaf primordia and in the SAM. FRUITFULL (SaFUL) was later activated in the whole SAM but excluded from floral meristems. These patterns are integrated with previous observations concerning upregulation of SUPPRESSOR OF OVEREXPRESSION OF CO1 (SaSOC1) to provide a temporal and spatial map of floral transition in Sinapis. [less ▲]

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See detailAn FLC-like gene is controlled by vernalization in root chicory
Périlleux, Claire ULiege; Pieltain, Alexandra ULiege; D'Aloia, Maria ULiege et al

Poster (2008, September)

Vernalization is known to promote flowering in Arabidopsis via the repression by cold of the floral inhibitor gene FLOWERING LOCUS C (FLC). For long, FLC homologs have been found in Brassicaceae only but ... [more ▼]

Vernalization is known to promote flowering in Arabidopsis via the repression by cold of the floral inhibitor gene FLOWERING LOCUS C (FLC). For long, FLC homologs have been found in Brassicaceae only but it was recently reported that in sugar beet, the FLC-like gene BvFL1 functions as a repressor of flowering and is downregulated in response to cold. We describe here the cloning of CiFL1 from root chicory (Cichorium intybus). Expression patterns were studied in two cultivars, differing in their sensitivity to vernalization. Transcript level analyzes were performed during the vernalization treatment of the seedlings and in different post-vernalization conditions. Our results give further support to conservation of the biological function of FLC-like genes in eudicot species. [less ▲]

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See detailControl of floral transition in maize
Van Kerkhoven, Fabrizio ULiege; D'Aloia, Maria ULiege; Périlleux, Claire ULiege

Conference (2008, September)

Flowering time in plants is controlled by a number of environmental factors, among which photoperiod plays a key role. Maize ancestors are short-day (SD) plants, but breeding programs have selected ... [more ▼]

Flowering time in plants is controlled by a number of environmental factors, among which photoperiod plays a key role. Maize ancestors are short-day (SD) plants, but breeding programs have selected genotypes whose flowering is largely autonomous and occurs after production of a constant number of leaves regardless of photoperiod. Only few flowering time genes have been identified in maize; one of them is INDETERMINATE1 (ID1), cloned from a late-flowering mutant and encoding a zinc finger transcription factor. By contrast, the genetical control of flowering by photoperiod is best understood in the long-day (LD) dicot Arabidopsis and the SD monocot rice. A key regulator is the CONSTANS gene that mediates between the circadian clock – the time-keeper of the plant – and the synthesis of flowering signals. Here we report the analysis of a CONSTANS homolog in maize, ZmCO, in SD and in LD, and in different parts of the plant. Expression of ZmCO was found to be rhythmic and to be much higher in young leaf primordia than in mature leaf blades. Striking coincidence was observed with expression of ID1. [less ▲]

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See detailOptimization of the Production of the Amyloidogenic Variants of Human Lysozyme
Menzer, Linda ULiege; Tocquin, Pierre ULiege; Dony, Nicolas et al

Poster (2008, February 16)

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See detailLes plantes ont-elles un quota de CO2 fixé ?
Périlleux, Claire ULiege

Article for general public (2008)

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See detailPartenariat F.N.P.S.M.S. - ULg / Rapport d'activité ULg 2007
Périlleux, Claire ULiege; Van Kerkhoven, Fabrizio; Jennès, Nicolas et al

Report (2008)

Detailed reference viewed: 42 (16 ULiège)