TY  - JOUR
A1  - Meyer, Rhonda C.
A1  - Witucka-Wall, Hanna
A1  - Becher, Martina
A1  - Blacha, Anna Maria
A1  - Boudichevskaia, Anastassia
A1  - Dörmann, Peter
A1  - Fiehn, Oliver
A1  - Friedel, Svetlana
A1  - von Korff, Maria
A1  - Lisec, Jan
A1  - Melzer, Michael
A1  - Repsilber, Dirk
A1  - Schmidt, Renate
A1  - Scholz, Matthias
A1  - Selbig, Joachim
A1  - Willmitzer, Lothar
A1  - Altmann, Thomas
T1  - Heterosis manifestation during early Arabidopsis seedling development is characterized by intermediate gene expression and enhanced metabolic activity in the hybrids
JF  - The plant journal
N2  - 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.
KW  - heterosis
KW  - seedlings
KW  - metabolite profiling
KW  - transcript profiling
KW  - morphological analysis
KW  - Arabidopsis thaliana
KW  - biomass
Y1  - 2012
U6  - https://doi.org/10.1111/j.1365-313X.2012.05021.x
SN  - 0960-7412
VL  - 71
IS  - 4
SP  - 669
EP  - 683
PB  - Wiley-Blackwell
CY  - Hoboken
ER  - 
TY  - JOUR
A1  - Lisec, Jan
A1  - Römisch-Margl, Lilla
A1  - Nikoloski, Zoran
A1  - Piepho, Hans-Peter
A1  - Giavalisco, Patrick
A1  - Selbig, Joachim
A1  - Gierl, Alfons
A1  - Willmitzer, Lothar
T1  - Corn hybrids display lower metabolite variability and complex metabolite inheritance patterns
JF  - The plant journal
N2  - We conducted a comparative analysis of the root metabolome of six parental maize inbred lines and their 14 corresponding hybrids showing fresh weight heterosis. We demonstrated that the metabolic profiles not only exhibit distinct features for each hybrid line compared with its parental lines, but also separate reciprocal hybrids. Reconstructed metabolic networks, based on robust correlations between metabolic profiles, display a higher network density in most hybrids as compared with the corresponding inbred lines. With respect to metabolite level inheritance, additive, dominant and overdominant patterns are observed with no specific overrepresentation. Despite the observed complexity of the inheritance pattern, for the majority of metabolites the variance observed in all 14 hybrids is lower compared with inbred lines. Deviations of metabolite levels from the average levels of the hybrids correlate negatively with biomass, which could be applied for developing predictors of hybrid performance based on characteristics of metabolite patterns.
KW  - heterosis
KW  - Zea mays
KW  - metabolomics
Y1  - 2011
U6  - https://doi.org/10.1111/j.1365-313X.2011.04689.x
SN  - 0960-7412
VL  - 68
IS  - 2
SP  - 326
EP  - 336
PB  - Wiley-Blackwell
CY  - Malden
ER  -