Lignocellulosic Biomass: A Sustainable Bioenergy Source for the Future

Fatma, Shabih; Hameed, Amir; Noman, Muhammad; Shahid, Muhammad; Tariq, Mohsin; Sohail, Imran; Tabassum, Romana

doi:10.2174/0929866525666180122144504

Cited by 160 publications

(97 citation statements)

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“…As one of the most abundant natural resources, cellulose has been used in many different ways, such as in industrial fermentation, fiber material, and papermaking. As a polysaccharide, cellulose has been regarded as an important cornerstone of developments in bioenergy [11][12][13][14][15]. At present, using lignocellulose biomass as a carbon source substrate to produce methane, ethanol, and biofuels by microbial fermentation has become a hotspot in renewable energy research [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Studies of Cellulose and Starch Utilization and the Regulatory Mechanisms of Related Enzymes in Fungi

Wang

et al. 2020

Polymers

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Polysaccharides are biopolymers made up of a large number of monosaccharides joined together by glycosidic bonds. Polysaccharides are widely distributed in nature: Some, such as peptidoglycan and cellulose, are the components that make up the cell walls of bacteria and plants, and some, such as starch and glycogen, are used as carbohydrate storage in plants and animals. Fungi exist in a variety of natural environments and can exploit a wide range of carbon sources. They play a crucial role in the global carbon cycle because of their ability to break down plant biomass, which is composed primarily of cell wall polysaccharides, including cellulose, hemicellulose, and pectin. Fungi produce a variety of enzymes that in combination degrade cell wall polysaccharides into different monosaccharides. Starch, the main component of grain, is also a polysaccharide that can be broken down into monosaccharides by fungi. These monosaccharides can be used for energy or as precursors for the biosynthesis of biomolecules through a series of enzymatic reactions. Industrial fermentation by microbes has been widely used to produce traditional foods, beverages, and biofuels from starch and to a lesser extent plant biomass. This review focuses on the degradation and utilization of plant homopolysaccharides, cellulose and starch; summarizes the activities of the enzymes involved and the regulation of the induction of the enzymes in well-studied filamentous fungi.

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Section: Introductionmentioning

confidence: 99%

Studies of Cellulose and Starch Utilization and the Regulatory Mechanisms of Related Enzymes in Fungi

Wang

et al. 2020

Polymers

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“…As a potential biopolymer for renewable biofuel production and block chemical building, lignocellulosic biomass has been extensively used (1,2). Indeed, more than 60% of total biomass exist in the form of agricultural residues, such as wheat straw, rice straw and corn stover, all of which are composed of cellulose, hemicellulose and lignin (3,4).…”

Section: Introductionmentioning

confidence: 99%

Negative effects characterization and comparative transcriptomics elucidation on the lag phase of an industrialS. cerevisiaeunder the corn stover hydrolysate stress

Kuang

Guo

Zhang

et al. 2020

Preprint

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During biofuels fermentation from pretreated lignocellulosic biomass, the strong toxicity of the lignocellulose hydrolysate is resulted from the synergistic effect of multiple lignocellulosic inhibitors, which far exceeds the sum of effects caused by every single inhibitor. Meanwhile, the synergistic effect is unclear and the underlying response mechanism of the industrial yeast towards the actual pretreated lignocellulose hydrolysate is still under exploration. Here, we employed an industrial S. cerevisiae for the transcriptomic analysis in two time points (early and late) of the lag phase under the corn stover hydrolysate stress. As investigation, the corn stover hydrolysate caused the accumulation of reactive oxygen species (ROS), damages of mitochondrial membrane and endoplasmic reticulum (ER) membrane in the industrial S. cerevisiae YBA_08 during the lag phase, especially these negative effects were more significant at the early lag phase. Based on the transcriptome profile, the industrial S. cerevisiae YBA_08 might recruit stress-related transcription factors (MSN4, STE12, SFL1, CIN5, COM2, MIG3, etc.) through the mitogen-activated protein kinase (MAPK)-signaling pathway to induce a transient G1/G2 arrest, and to activate defense bioprocesses like protectants metabolism, sulfur metabolism, glutaredoxin system, thioredoxin system, heat shock proteins chaperone and oxidoreductase detoxification, resisting those compounded stresses including oxidative stress, osmotic stress and structural stress. Surprisingly, this defense system might be accompanied with the transient repression of several bioprocesses like fatty acid metabolism, purine de novo biosynthesis and ergosterol biosynthesis.Importance This research systematically demonstrated the lag phase response of an industrial yeast to the lignocellulosic hydrolysate in transcriptional level, providing a molecular fundament for understanding the synergistic effect of various lignocellulosic inhibitors and the regulatory mechanism of tolerance for industrial yeasts under this stress.

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“…Industrialization and population growth leads to increased energy demands, and interest in alternative energy has increased because of fossil fuel depletion and environmental problems. Lignocellulosic biomass is a widely available raw material that can be used to reduce the energetic dependence on fossil fuels, reducing the production of greenhouse effect gases involved in global warming (Fatma et al, ; Nigam & Singh, ; Robertson et al, ). The pentose sugar d ‐xylose is the second most abundant monosaccharide in nature, accounting for approximately 35% of the total sugar in lignocellulosic biomass (Haldar, Sen, & Gayen, ).…”

Section: Introductionmentioning

confidence: 99%

d‐Xylose consumption by nonrecombinant Saccharomyces cerevisiae: A review

Patiño

Ortiz

Velásquez

et al. 2019

Yeast

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Xylose is the second most abundant sugar in nature. Its efficient fermentation has been considered as a critical factor for a feasible conversion of renewable biomass resources into biofuels and other chemicals. The yeast Saccharomyces cerevisiae is of exceptional industrial importance due to its excellent capability to ferment sugars. However, although S. cerevisiae is able to ferment xylulose, it is considered unable to metabolize xylose, and thus, a lot of research has been directed to engineer this yeast with heterologous genes to allow xylose consumption and fermentation. The analysis of the natural genetic diversity of this yeast has also revealed some nonrecombinant S. cerevisiae strains that consume or even grow (modestly) on xylose. The genome of this yeast has all the genes required for xylose transport and metabolism through the xylose reductase, xylitol dehydrogenase, and xylulokinase pathway, but there seems to be problems in their kinetic properties and/or required expression. Self‐cloning industrial S. cerevisiae strains overexpressing some of the endogenous genes have shown interesting results, and new strategies and approaches designed to improve these S. cerevisiae strains for ethanol production from xylose will also be presented in this review.

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Lignocellulosic Biomass: A Sustainable Bioenergy Source for the Future

Cited by 160 publications

References 0 publications

Studies of Cellulose and Starch Utilization and the Regulatory Mechanisms of Related Enzymes in Fungi

Studies of Cellulose and Starch Utilization and the Regulatory Mechanisms of Related Enzymes in Fungi

Negative effects characterization and comparative transcriptomics elucidation on the lag phase of an industrialS. cerevisiaeunder the corn stover hydrolysate stress

d‐Xylose consumption by nonrecombinant Saccharomyces cerevisiae: A review

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