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  • 1.
    Meyer, Rhonda C
    et al.
    Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany.
    Witucka-Wall, Hanna
    Department of Genetics, Institute of Biochemistry and Biology, University of Potsdam, Potsdam-Golm, Germany.
    Becher, Martina
    Department of Genetics, Institute of Biochemistry and Biology, University of Potsdam, Potsdam-Golm, Germany.
    Blacha, Anna
    Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany.
    Boudichevskaia, Anastassia
    Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany.
    Dörmann, Peter
    Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany.
    Fiehn, Oliver
    Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany.
    Friedel, Svetlana
    Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany.
    von Korff, Maria
    Department of Genetics, Institute of Biochemistry and Biology, University of Potsdam, Potsdam-Golm, Germany.
    Lisec, Jan
    Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany.
    Melzer, Michael
    Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany.
    Repsilber, Dirk
    Leibniz Institute for Farm Animal Biology (FBN), Dummerstorf, Germany.
    Schmidt, Renate
    Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany.
    Scholz, Matthias
    Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany.
    Selbig, Joachim
    Department of Bioinformatics, Institute of Biochemistry and Biology, University of Potsdam, Potsdam-Golm, Germany.
    Willmitzer, Lothar
    Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany; King Abdulaziz University, P.O., Jeddah, Saudi Arabia.
    Altmann, Thomas
    Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany; Department of Genetics, Institute of Biochemistry and Biology, University of Potsdam, Potsdam-Golm, Germany.
    Heterosis manifestation during early Arabidopsis seedling development is characterized by intermediate gene expression and enhanced metabolic activity in the hybrids2012In: The Plant Journal, ISSN 0960-7412, E-ISSN 1365-313X, Vol. 71, no 4, p. 669-83Article in journal (Refereed)
    Abstract [en]

    Heterosis-associated cellular and molecular processes were analyzed in seeds and seedlings of Arabidopsis thaliana accessions Col-0 and C24 and their heterotic hybrids. Microscopic examination revealed no advantages in terms of hybrid mature embryo organ sizes or cell numbers. Increased cotyledon sizes were detectable 4 days after sowing. Growth heterosis results from elevated cell sizes and numbers, and is well established at 10 days after sowing. The relative growth rates of hybrid seedlings were most enhanced between 3 and 4 days after sowing. Global metabolite profiling and targeted fatty acid analysis revealed maternal inheritance patterns for a large proportion of metabolites in the very early stages. During developmental progression, the distribution shifts to dominant, intermediate and heterotic patterns, with most changes occurring between 4 and 6 days after sowing. The highest incidence of heterotic patterns coincides with establishment of size differences at 4 days after sowing. In contrast, overall transcript patterns at 4, 6 and 10 days after sowing are characterized by intermediate to dominant patterns, with parental transcript levels showing the largest differences. Overall, the results suggest that, during early developmental stages, intermediate gene expression and higher metabolic activity in the hybrids compared to the parents lead to better resource efficiency, and therefore enhanced performance in the hybrids.

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