Transgenic ferritin overproduction enhances thermochemical pretreatments in Arabidopsis
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Purdue Univ., West Lafayette, IN (United States)
- Purdue Univ., West Lafayette, IN (United States) ; Univ. of Maryland, College Park, MD (United States)
- Purdue Univ., West Lafayette, IN (United States) ; Univ. of Maryland, College Park, MD (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States); Michigan State Univ., East Lansing, MI (United States)
Reducing the severity of thermochemical pretreatment by incorporating iron ions as co-catalysts has been shown to enhance the sugar yield from dilute acid pretreatments and enzymatic saccharification. However, current approach of soaking iron containing acid solutions onto milled biomass prior to pretreatment is time-consuming and subject to diffusion limitations. In this work, we overexpressed soybean ferritin protein intracellularly in Arabidopsis plants (referred to as FerIN) under the control of the 35S promoter for the purpose of accumulating iron ions in Arabidopsis plants. The transgenic Arabidopsis plants accumulated iron during growth under both normal and iron-augmented watering conditions. Prussian blue staining showed punctuate staining of iron predominantly on the interior surfaces of cell lumen in FerIN plants. The harvested transgenic biomass showed enhanced pretreatability, in that it released 13–19% more glucose and xylose than empty vector control plants. The data pointed to a positive correlation between iron concentration and sugar release during pretreatment of transgenic biomass.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Direct Catalytic Conversion of Biomass to Biofuels (C3Bio); National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC000997; AC36-08-GO28308
- OSTI ID:
- 1370483
- Alternate ID(s):
- OSTI ID: 1250568
- Journal Information:
- Biomass and Bioenergy, Vol. 72, Issue C; Related Information: C3Bio partners with Purdue University (lead); Argonne National Laboratory; National Renewable Energy Laboratory; Northeastern University; University of Tennessee; ISSN 0961-9534
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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