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000021063 1001_ $$0P:(DE-HGF)0$$aMeyer, R.C.$$b0
000021063 245__ $$aHeterosis manifestation during early Arabidopsis seedling development is characterized by intermediate gene expression and enhanced metabolic activity in the hybrids
000021063 260__ $$aOxford [u.a.]$$bWiley-Blackwell$$c2012
000021063 300__ $$a669 - 683
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000021063 500__ $$aThis work was supported by research grants from the Deutsche Forschungsgemeinschaft (SPP1149), the European Commission Framework Programme 6 Integrated Project: AGRON-OMICS (LSHG-CT 2006-037704), the German Ministry for Education and Research (GoFORSYS, GABI-OIL 0315053G) and the Max Planck Society.
000021063 520__ $$aHeterosis-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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000021063 65320 $$2Author$$aheterosis
000021063 65320 $$2Author$$aseedlings
000021063 65320 $$2Author$$ametabolite profiling
000021063 65320 $$2Author$$atranscript profiling
000021063 65320 $$2Author$$amorphological analysis
000021063 65320 $$2Author$$aArabidopsis thaliana
000021063 65320 $$2Author$$abiomass
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000021063 7001_ $$0P:(DE-HGF)0$$aWitucka-Wall, H.$$b1
000021063 7001_ $$0P:(DE-Juel1)129280$$aBecher, M.$$b2$$uFZJ
000021063 7001_ $$0P:(DE-HGF)0$$aBlacha, A.$$b3
000021063 7001_ $$0P:(DE-HGF)0$$aBoudichevskaia, A.$$b4
000021063 7001_ $$0P:(DE-HGF)0$$aDörmann, P.$$b5
000021063 7001_ $$0P:(DE-HGF)0$$aFiehn, O.$$b6
000021063 7001_ $$0P:(DE-HGF)0$$aFriedel, S.$$b7
000021063 7001_ $$0P:(DE-HGF)0$$avon Korff, M.$$b8
000021063 7001_ $$0P:(DE-HGF)0$$aLisec, J.$$b9
000021063 7001_ $$0P:(DE-HGF)0$$aMelzer, M.$$b10
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000021063 8567_ $$uhttp://dx.doi.org/10.1111/j.1365-313X.2012.05021.x
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