Authors: Rita Sharma Feng Tan KiHong Jung Manoj K Sharma Zhaohua Peng Pamela C Ronald
Publish Date: 2011/09/02
Volume: 77, Issue: 4-5, Pages: 391-
Abstract
Efficient and costeffective conversion of plant biomass to usable forms of energy requires a thorough understanding of cell wall biosynthesis modification and degradation To elucidate these processes we assessed the expression dynamics during enzymatic removal and regeneration of rice cell walls in suspension cells over time In total 928 genes exhibited significant upregulation during cell wall removal whereas 79 genes were upregulated during cell wall regeneration Both gene sets are enriched for kinases transcription factors and genes predicted to be involved in cell wallrelated functions Integration of the gene expression datasets with a catalog of known and/or predicted biochemical pathways from rice revealed metabolic and hormonal pathways involved in cell wall degradation and regeneration Rice lines carrying Tos17 mutations in genes upregulated during cell wall removal exhibit dwarf phenotypes Many of the genes upregulated during cell wall development are also upregulated in response to infection and environmental perturbations indicating a coordinated response to diverse types of stressThis work was supported by a US Department of Energy DEFG0207ER6445907110980 and USDA 2007355041824007110980 grant to PCR and ZP an Office of Science Office of Biological and Environmental Research of the US DOE contract no DEAC0205CH11231 to the Joint BioEnergy Institute and a grant from the NextGeneration BioGreen 21 Program No SSAC2011 Rural Development Administration Republic of Korea to KHJ We thank Dr Peijian Cao for helping with data normalization
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