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Berlin, Germany

Mennicken L.,Bundesministerium fur Bildung und Forschung | Jacobi A.,Projekttrager Julich | Degenhardt A.,Projekttrager Julich
Chemie-Ingenieur-Technik | Year: 2012

The Federal Government of Germany has reacted to supply risks of non-energetic mineral raw materials with its raw material strategy. The Federal Ministry of Education and Research (BMBF) supports this strategy by institutional funding as well as project funding. The new program Raw Materials of Strategic Economic Importance for High-Tech Made in Germany will set the direction for new activities. Several support programs within the scope of the BMBF's general program Research for Sustainable Development are described. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source


Heimann L.,Projekttrager Julich | Horst I.,Projekttrager Julich | Perduns R.,Leibniz University of Hanover | Dreesen B.,Projekttrager Julich | And 2 more authors.
Plant Physiology | Year: 2013

C4 photosynthesis evolvedmore than 60 times independently in different plant lineages. Each time,multiple genes were recruited into C4 metabolism. The corresponding promoters acquired new regulatory features such as high expression, light induction, or cell typespecific expression in mesophyll or bundle sheath cells. We have previously shown that histone modifications contribute to the regulation of the model C4 phosphoenolpyruvate carboxylase (C4-Pepc) promoter in maize (Zea mays). We here tested the light- and cell type-specific responses of three selected histone acetylations and two histone methylations on five additional C4 genes (C4-Ca, C4- Ppdk, C4-Me, C4-Pepck, and C4-RbcS2) in maize. Histone acetylation and nucleosome occupancy assays indicated extended promoter regions with regulatory upstream regions more than 1,000 bp from the transcription initiation site for most of these genes. Despite any detectable homology of the promoters on the primary sequence level, histone modification patterns were highly coregulated. Specifically, H3K9ac was regulated by illumination, whereas H3K4me3 was regulated in a cell type-specific manner. We further compared histone modifications on the C4-Pepc and C4-Me genes from maize and the homologous genes from sorghum (Sorghum bicolor) and Setaria italica.Whereas sorghum and maize share a common C4 origin, C4 metabolism evolved independently in S. italica. The distribution of histone modifications over the promoters differed between the species, but differential regulation of light-induced histone acetylation and cell type-specific histone methylation were evident in all three species. We propose that a preexisting histone code was recruited into C4 promoter control during the evolution of C4 metabolism. © 2013 American Society of Plant Biologists. All Rights Reserved. Source

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