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Arabidopsis Coordinates the Diurnal Regulation of Carbon Allocation and Growth across a Wide Range of Photoperiods

Molecular Plant 2014年第1期7卷 137-155页

作者： Ronan Sulpice Anna Flis Alexander A. Ivakov Federico Apelt Nicole Krohn Beatrice Encke Christin Abel regina.feil John E. Lunn Mark Stitt Max Planck Institute of Molecular Plant Physiology Am Muehlenberg 1 14476 Potsdam-Golm Germany National University of Galway Plant Systems Biology Lab Plant and AgriBiosciences Research Centre Botany and Plant Science Galway Ireland

In short photoperiods, plants accumulate starch more rapidly in the light and degrade it more slowly at night, ensuring that their starch reserves last until dawn. To investigate the accompanying changes in the timing of growth, Arabidopsis was grown in a range of photoperiods and analyzed for rosette biomass, photosynthesis, respiration, ribosome abundance, polysome loading, starch, and over 40 metabolites at dawn and dusk. The data set was used to model growth rates in the daytime and night, and to identify metabolites that correlate with growth. Modeled growth rates and polysome loading were high in the daytime and at night in long photoperiods, but decreased at night in short photoperiods. Ribosome abundance was similar in all photoperiods. It is discussed how the amount of starch accumulated in the light period, the length of the night, and maintenance costs interact to constrain growth at night in short photoperiods, and alter the strategy for optimizing ribosome use. Significant correlations were found in the day- time and the night between growth rates and the levels of the sugar-signal trehalose 6-phosphate and the amino acid biosynthesis intermediate shikimate, identifying these metabolites as hubs in a network that coordinates growth with diurnal changes in the carbon supply.

关键词： Arabidopsis diurnal growth photoperiod ribosomes trehalose-6-phosphate starch

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Proteomic and metabolomic profiling underlines the stage- and time-dependent effects of high temperature on grape berry metabolism

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Journal of Integrative Plant Biology 2020年第8期62卷 1132-1158页

作者： David Lecourieux Christian Kappel Stéphane Claverol Philippe Pieri regina.feil John E.Lunn Marc Bonneu Lijun Wang Eric Gomès Serge Delrot Fatma Lecourieux UMR1287 EGFV INRAEBordeaux Sciences AgroBordeaux UniversityISVV33140 Villenave d'OrnonFrance Institut of Biochemistry and Biology Potsdam UniversityD-14476 PotsdamGermany Proteome Platform Bordeaux Functional Genomic CenterBordeaux University33076 BordeauxFrance Max Planck Institute of Molecular Plant Physiology 14476 PotsdamGolmGermany Institute of Botany the Chinese Academy of SciencesBeijing 100093China UMR1287 EGFV CNRSINRAEBordeaux Sciences AgroBordeaux UniversityISVV33140 Villenave d'OrnonFrance

Climate change scenarios predict an increase in mean air temperatures and in the frequency,intensity,and length of extreme temperature events in many wine-growing regions *** elevated temperature has detrimental effects on berry growth and composition,it threatens the economic and environmental sustainability of wine *** Cabernet Sauvignon fruit-bearing cuttings,we investigated the effects of high temperature(HT)on grapevine berries through a label-free shotgun proteomic analysis coupled to a complementary metabolomic *** the 2,279 proteins identified,592 differentially abundant proteins were found in berries exposed to *** gene ontology categories“stress,”“protein,”“secondary metabolism,”and“cell wall”were predominantly altered under *** temperatures strongly impaired carbohydrate and energy metabolism,and the effects depended on the stage of development and duration of *** amounts correlated poorly with protein expression levels in HT berries,highlighting the value of proteomic studies in the context of heat ***,this work reveals that HT alters key proteins driving berry development and ***,we provide a list of differentially abundant proteins that can be considered as potential markers for developing or selecting grape varieties that are better adapted to warmer climates or extreme heat waves.

关键词： metabolism extreme high

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