TY - JOUR
T1 - Microscopic analysis of wheat straw cell wall degradation by microbial consortia for hydrogen production
AU - Pérez-Rangel, Marisol
AU - Quiroz-Figueroa, Francisco R.
AU - González-Castañeda, Jaquelina
AU - Valdez-Vazquez, Idania
N1 - Publisher Copyright:
© 2014 Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
PY - 2015/1/5
Y1 - 2015/1/5
N2 - In nature, diverse microbial consortia degrade recalcitrant lignocellulosic substrates efficiently through poorly defined mechanisms. Their study can help to design a microbial consortium that performs a consolidated bioprocess for biofuel production. Microbial consortia from anaerobic sludge, epiphytic microorganisms, ruminal fluids, and soil were examined with regard to H2 production from untreated wheat straw. Cell wall degradation in short cells and the stomata was analyzed by confocal laser scanning microscopy. On day 7, the highest rate and H2 production were reached by native microflora. For all inocula, sugars from the hemicellulosic matrix were preferably consumed. The microscopic images showed that the cell wall in stomatal areas was degraded more extensively than in short cells. Also, fungal populations were detected in consortia with better H2 production. Of the consortia that we tested, the epiphytic microorganisms were notable, because they delignified the lignocellulosic substrate and converted the hemicellulosic sugars into H2 efficiently.
AB - In nature, diverse microbial consortia degrade recalcitrant lignocellulosic substrates efficiently through poorly defined mechanisms. Their study can help to design a microbial consortium that performs a consolidated bioprocess for biofuel production. Microbial consortia from anaerobic sludge, epiphytic microorganisms, ruminal fluids, and soil were examined with regard to H2 production from untreated wheat straw. Cell wall degradation in short cells and the stomata was analyzed by confocal laser scanning microscopy. On day 7, the highest rate and H2 production were reached by native microflora. For all inocula, sugars from the hemicellulosic matrix were preferably consumed. The microscopic images showed that the cell wall in stomatal areas was degraded more extensively than in short cells. Also, fungal populations were detected in consortia with better H2 production. Of the consortia that we tested, the epiphytic microorganisms were notable, because they delignified the lignocellulosic substrate and converted the hemicellulosic sugars into H2 efficiently.
KW - Cell wall
KW - Confocal laser scanning microscopy
KW - Consolidated bioprocess
KW - Delignification
KW - Fungi
UR - http://www.scopus.com/inward/record.url?scp=84916229754&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2014.10.050
DO - 10.1016/j.ijhydene.2014.10.050
M3 - Artículo
SN - 0360-3199
VL - 40
SP - 151
EP - 160
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 1
ER -