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  • Title: Using a starch-rich mutant of Arabidopsis thaliana as feedstock for fermentative hydrogen production.
    Author: Lo YC, Huang LF, Cheng CL, Chen J, Chang JS.
    Journal: Bioresour Technol; 2011 Sep; 102(18):8543-6. PubMed ID: 21546247.
    Abstract:
    A mutant plant (Arabidopsis thaliana), sex1-1 (starch excess 1-1), accumulating high starch content in leaves was created to serve as better biomass feedstock for a H2-producing strain Clostridium butyricum CGS2, which efficiently utilizes starch for H2 production but cannot assimilate cellulosic materials. The starch content of the mutant plant increased to 10.67 mg/fresh weight, which is four times higher than that of wild type plant. Using sex1-1 mutant plant as feedstock, C. butyricum CGS2 could produce 490.4 ml/l of H2 with a H2 production rate of 32.9 ml/h/l. The H2 production performance appeared to increase with the increase in the concentration of mutant plant from 2.5 to 10 g/l. The highest H2 to plant biomass yield was nearly 49 ml/g for the mutant plant. This study successfully demonstrated the feasibility of using a starch-rich mutant plant for more effective bioH2 production with C. butyricum CGS2.
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