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Ćilerdžić J, Galić M, Stajić M. From pomiculture waste to biotechnological raw material: efficient transformation using ligninosomes and cellulosomes from Pleurotus spp. BIORESOUR BIOPROCESS 2022; 9:66. [PMID: 38647551 PMCID: PMC10991930 DOI: 10.1186/s40643-022-00555-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 06/01/2022] [Indexed: 11/10/2022] Open
Abstract
The goal of this study was to determine the capacity of Pleurotus spp. lignocellulosome to transform frequent pomiculture residues (grapevine-, plum-, and raspberry sawdust) into raw materials for biotechnological processes. All three lignocellulosics induced the synthesis of ligninolytic and cellulolytic enzymes in the tested species. Laccase was dominant in the ligninolytic cocktail, with a maximum activity of 40,494.88 U L-1 observed after the cultivation of P. pulmonarius on grapevine sawdust. Grapevine sawdust also proved to be the optimal substrate for the synthesis of versatile peroxidases especially in P. eryngii (1010.10 U L-1), while raspberry sawdust favored the production of Mn-dependent peroxidase in P. pulmonarius (479.17 U L-1). P. pulmonarius was the dominant cellulolytic agent and raspberry sawdust was optimal for the synthesis of xylanases, and endo- and exo-cellulases (15,746.35 U L-1, 9741.56 U L-1, and 836.62 U L-1), while grapevine sawdust mostly induced β-glucosidase activity (166.11 U L-1). The degree of residues delignification was more substrate- than species-dependent, ranging between 6.44 and 23.72% after the fermentation of grapevine and raspberry sawdust with P. pulmonarius. On the other hand, the lowest level of cellulose consumption was also observed on raspberry sawdust after the cultivation of P. eryngii, which together with high delignification also induced the highest selectivity index (1.27). The obtained results show the exceptional lignocellulolytic potential of Pleurotus spp. enzyme cocktails which opens up many possibilities for their application in numerous biotechnological processes.
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Affiliation(s)
- Jasmina Ćilerdžić
- Faculty of Biology, University of Belgrade, Takovska 43, 11000, Belgrade, Serbia.
| | - Milica Galić
- Faculty of Biology, University of Belgrade, Takovska 43, 11000, Belgrade, Serbia
| | - Mirjana Stajić
- Faculty of Biology, University of Belgrade, Takovska 43, 11000, Belgrade, Serbia
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Wang J, Li L, Xu H, Zhang Y, Liu Y, Zhang F, Shen G, Yan L, Wang W, Tang H, Qiu H, Gu JD, Wang W. Construction of a fungal consortium for effective degradation of rice straw lignin and potential application in bio-pulping. BIORESOURCE TECHNOLOGY 2022; 344:126168. [PMID: 34737050 DOI: 10.1016/j.biortech.2021.126168] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/14/2021] [Accepted: 10/16/2021] [Indexed: 06/13/2023]
Abstract
To improve the lignin degradation efficiency, we established a co-culture consortium (LDFC) consisting of Trametes hirsuta BYL-3, Trametes versicolor BYL-7 and Trametes hirsuta BYL-8. The testing results showed that the constructed consortium showed improved the lignin degradation rate by fungi. The optimal cultivation conditions were mixture at 1:1:1 vol ratio of each fungus, 7% (w/v) of inoculum amount, culture temperature at 26 °C, pH was 6.9 and 10 days of culturing time. Under these conditions, the degradation rate of lignin was 39.7%, which was 9.3% higher than those before optimization (30.4%). Using rice straw for treatment by LDFC to papermaking, the paper tensile strength was 8 N, and the ring pressure index was 2.46 N·m/g, which meets the standards for the production of corrugated paper for packaging. These results indicate that LDFC has potential application value to convert rice straw resources for bio-pulping to make papers.
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Affiliation(s)
- Jinghong Wang
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, People's Republic of China; Engineering Research Center of Processing and Utilization of Grain By-products, Ministry of Education, Daqing 163319, People's Republic of China
| | - Lingling Li
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, People's Republic of China; Engineering Research Center of Processing and Utilization of Grain By-products, Ministry of Education, Daqing 163319, People's Republic of China
| | - Hongmin Xu
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, People's Republic of China; Engineering Research Center of Processing and Utilization of Grain By-products, Ministry of Education, Daqing 163319, People's Republic of China
| | - Yali Zhang
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, People's Republic of China; Engineering Research Center of Processing and Utilization of Grain By-products, Ministry of Education, Daqing 163319, People's Republic of China
| | - Yuxin Liu
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, People's Republic of China; Engineering Research Center of Processing and Utilization of Grain By-products, Ministry of Education, Daqing 163319, People's Republic of China
| | - Fangzheng Zhang
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, People's Republic of China; Engineering Research Center of Processing and Utilization of Grain By-products, Ministry of Education, Daqing 163319, People's Republic of China
| | - Guinan Shen
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, People's Republic of China; Engineering Research Center of Processing and Utilization of Grain By-products, Ministry of Education, Daqing 163319, People's Republic of China
| | - Lei Yan
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, People's Republic of China; Engineering Research Center of Processing and Utilization of Grain By-products, Ministry of Education, Daqing 163319, People's Republic of China
| | - Weiwei Wang
- State Key Laboratory of Microbial Metabolism, School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Hongzhi Tang
- State Key Laboratory of Microbial Metabolism, School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Huajiao Qiu
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, People's Republic of China
| | - Ji-Dong Gu
- Environmental Science and Technology Research Group, Guangdong Technion - Israel Institute of Technology, 241 Daxue Road, Shantou, Guangdong 515063, People's Republic of China
| | - Weidong Wang
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Argo-Waste in Cold Region, College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, People's Republic of China; Engineering Research Center of Processing and Utilization of Grain By-products, Ministry of Education, Daqing 163319, People's Republic of China; Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, People's Republic of China.
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Galić M, Stajić M, Vukojević J, Ćilerdžić J. Obtaining Cellulose-Available Raw Materials by Pretreatment of Common Agro-Forestry Residues With Pleurotus spp. Front Bioeng Biotechnol 2021; 9:720473. [PMID: 34631677 PMCID: PMC8493038 DOI: 10.3389/fbioe.2021.720473] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 09/13/2021] [Indexed: 11/20/2022] Open
Abstract
The goals of the present study were to characterize the profile of ligninolytic enzymes in five Pleurotus species and determine their ability to delignify eight common agro-forestry residues. Generally, corn stalks were the optimal inducer of Mn-dependent peroxidase activity, but the activity peak was noted after wheat straw fermentation by P. eryngii (3066.92 U/L). P. florida was the best producer of versatile peroxidase, especially on wheat straw (3028.41 U/L), while apple sawdust induced the highest level of laccase activity in P. ostreatus (49601.82 U/L). Efficiency of the studied enzymes was expressed in terms of substrate dry matter loss, which was more substrate-than species-dependent. Reduction of substrate dry mass ranged between 24.83% in wheat straw and 8.83% in plum sawdust as a result of fermentation with P. florida and P. pulmonarius, respectively. The extent of delignification of the studied substrates was different, ranging from 51.97% after wheat straw fermentation by P. pulmonarius to 4.18% in grapevine sawdust fermented by P. ostreatus. P. pulmonarius was also characterized by the highest cellulose enrichment (6.54) and P. ostreatus by very low one (1.55). The tested biomass is a highly abundant but underutilized source of numerous value-added products, and a cocktail of ligninolytic enzymes of Pleurotus spp. could be useful for its environmentally and economically friendly transformation.
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Affiliation(s)
- Milica Galić
- Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - Mirjana Stajić
- Faculty of Biology, University of Belgrade, Belgrade, Serbia
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Andriani A, Maharani A, Yanto DHY, Pratiwi H, Astuti D, Nuryana I, Agustriana E, Anita SH, Juanssilfero A, Perwitasari U, Pantouw CF, Nurhasanah AN, Windiastri VE, Nugroho S, Widyajayantie D, Sutiawan J, Sulistyowati Y, Rahmani N, Ningrum RA, Yopi. Sequential production of ligninolytic, xylanolytic, and cellulolytic enzymes by Trametes hirsuta AA-017 under different biomass of Indonesian sorghum accessions-induced cultures. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.biteb.2020.100562] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Gopalakrishnan RM, Manavalan T, Ramesh J, Thangavelu KP, Heese K. Improvement of Saccharification and Delignification Efficiency of Trichoderma reesei Rut-C30 by Genetic Bioengineering. Microorganisms 2020; 8:microorganisms8020159. [PMID: 31979278 PMCID: PMC7074786 DOI: 10.3390/microorganisms8020159] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 01/20/2020] [Accepted: 01/22/2020] [Indexed: 11/16/2022] Open
Abstract
Trichoderma reesei produces various saccharification enzymes required for biomass degradation. However, the lack of an effective lignin-degrading enzyme system reduces the species’ efficiency in producing fermentable sugars and increases the pre-treatment costs for biofuel production. In this study, we heterologously expressed the Ganoderma lucidum RMK1 versatile peroxidase gene (vp1) in the Rut-C30 strain of T. reesei. The expression of purified 6×His-tag–containing recombinant G. lucidum-derived protein (rVP1) was confirmed through western blot, which exhibited a single band with a relative molecular weight of 39 kDa. In saccharification and delignification studies using rice straw, the transformant (tVP7, T. reesei Rut-C30 expressing G. lucidum-derived rVP1) showed significant improvement in the yield of total reducing sugar and delignification, compared with that of the parent T. reesei Rut-C30 strain. Scanning electron microscopy (SEM) of tVP7-treated paddy straw showed extensive degradation of several layers of its surface compared with the parent strain due to the presence of G. lucidum-derived rVP1. Our results suggest that the expression of ligninolytic enzymes in cellulase hyperproducing systems helps to integrate the pre-treatment and saccharification steps that may ultimately reduce the costs of bioethanol production.
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Affiliation(s)
- Raja Mohan Gopalakrishnan
- Centre for Advanced Studies in Botany, University of Madras, Guindy Campus, Chennai, Tamil Nadu 600 025, India; (R.M.G.); (T.M.)
| | - Tamilvendan Manavalan
- Centre for Advanced Studies in Botany, University of Madras, Guindy Campus, Chennai, Tamil Nadu 600 025, India; (R.M.G.); (T.M.)
| | - Janani Ramesh
- Department of Medical Biochemistry, Dr ALM Postgraduate Institute of Biomedical Sciences, University of Madras, Chennai, Tamil Nadu 600 113, India;
| | - Kalaichelvan Puthupalayam Thangavelu
- Centre for Advanced Studies in Botany, University of Madras, Guindy Campus, Chennai, Tamil Nadu 600 025, India; (R.M.G.); (T.M.)
- Correspondence: (K.P.T.); (K.H.)
| | - Klaus Heese
- Graduate School of Biomedical Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, Korea
- Correspondence: (K.P.T.); (K.H.)
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Ćilerdžić J, Galić M, Ivanović Ž, Brčeski I, Vukojević J, Stajić M. Stimulation of Wood Degradation by Daedaleopsis confragosa and D. tricolor. Appl Biochem Biotechnol 2018; 187:1371-1383. [PMID: 30229433 DOI: 10.1007/s12010-018-2884-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 09/09/2018] [Indexed: 11/25/2022]
Abstract
Biological pretreatment of the lignocellulosic residues, in which white-rot fungi have a crucial role, has many advantages compared to the chemical, physical, and physico-chemical methods of delignification and therefore attracts increasing scientific attention. Regarding the fact that properties and capacities of the ligninolytic enzymes of Daedaleopsis spp. are still unknown, the aim of this study was to research how nitrogen sources and inducers affect the potential of Daedaleopsis confragosa and Daedaleopsis tricolor to degrade cherry sawdust. NH4NO3, (NH4)2SO4, and peptone were tested as nitrogen sources, while veratryl alcohol, p-anisidine, vanillic acid, and phenylmethylsulfonyl fluoride were the studied inducers. As Mn-dependent peroxidase and laccase were the leader enzymes and cherry sawdust/peptone medium the best stimulator of their activities, the effect of inducers on delignification potential of these species was studied during fermentation of that substrate. Veratryl alcohol was the best stimulator of laccase and phenylmethylsulfonyl fluoride of Mn-dependent peroxidase activity (27,610.0 and 1338.4 U/L, respectively). These inducers also increased cherry sawdust delignification selectivity, particularly in D. tricolor in the presence of phenylmethylsulfonyl fluoride (lignin:hemicellulose:cellulose = 32.1%:0.9%:11.7%). Owing to the presented results, studied species could have an important role in the phase of lignocellulose pretreatment in various biotechnological processes.
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Affiliation(s)
- Jasmina Ćilerdžić
- Faculty of Biology, University of Belgrade, Takovska 43, Belgrade, 11000, Serbia.
| | - Milica Galić
- Faculty of Biology, University of Belgrade, Takovska 43, Belgrade, 11000, Serbia
| | - Žarko Ivanović
- Institute for Plant Protection and Environment, Teodora Drajzera 9, Belgrade, 11000, Serbia
| | - Ilija Brčeski
- Faculty of Chemistry, University of Belgrade, Studentski Trg 12-16, Belgrade, 11000, Serbia
| | - Jelena Vukojević
- Faculty of Biology, University of Belgrade, Takovska 43, Belgrade, 11000, Serbia
| | - Mirjana Stajić
- Faculty of Biology, University of Belgrade, Takovska 43, Belgrade, 11000, Serbia
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Jović J, Buntić A, Radovanović N, Petrović B, Mojović L. Lignin-Degrading Abilities of Novel Autochthonous Fungal
Isolates Trametes hirsuta F13 and Stereum gausapatum F28. Food Technol Biotechnol 2018; 56:354-365. [PMID: 30510479 PMCID: PMC6233014 DOI: 10.17113/ftb.56.03.18.5348] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The aim of this research is to isolate and identify fungi with high lignin-degrading abilities that are autochthonous to southern Serbian region. Two novel fungal isolates identified as Trametes hirsuta F13 and Stereum gausapatum F28 were selected to assess their ligninolytic enzyme activities and the efficiency of lignin removal from beech wood sawdust. Obtained results show that both isolates are good sources of industrially valuable enzymes with a potential for application in various biotechnological and industrial processes. Both isolates showed laccase, manganese-dependent peroxidase, and versatile peroxidase activities, while only S. gausapatum F28 had lignin peroxidase activity. This is the first record of the ability of S. gausapatum species to produce lignin peroxidase. T. hirsuta F13 showed higher laccase activity than S. gausapatum F28, while S. gausapatum F28 had higher manganese peroxidase activity. Also, T. hirsuta F13 exhibited much higher laccase activity under submerged cultivation conditions than solid-state cultivation conditions, which is rare for fungi. This is important for industrial processes since the submerged fermentation is a dominant technique in industry. The test of the efficiency of lignin removal showed that both isolates are efficient lignin decomposers. After five weeks of incubation on beech wood sawdust, the total lignin losses were 33.84% with T. hirsuta F13 and 28.8% with S. gausapatum F28.
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Affiliation(s)
- Jelena Jović
- University of Belgrade, Faculty of Technology and Metallurgy, Department for Biochemical Engineering and Biotechnology, Karnegijeva 4, RS-11120 Belgrade, Serbia
| | - Aneta Buntić
- University of Belgrade, Faculty of Technology and Metallurgy, Department for Biochemical Engineering and Biotechnology, Karnegijeva 4, RS-11120 Belgrade, Serbia
| | - Neda Radovanović
- University of Belgrade, Faculty of Technology and Metallurgy, Department for Biochemical Engineering and Biotechnology, Karnegijeva 4, RS-11120 Belgrade, Serbia
| | - Bojan Petrović
- University of Belgrade, Faculty of Technology and Metallurgy, Department for Biochemical Engineering and Biotechnology, Karnegijeva 4, RS-11120 Belgrade, Serbia
| | - Ljiljana Mojović
- University of Belgrade, Faculty of Technology and Metallurgy, Department for Biochemical Engineering and Biotechnology, Karnegijeva 4, RS-11120 Belgrade, Serbia
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Kong W, Fu X, Wang L, Alhujaily A, Zhang J, Ma F, Zhang X, Yu H. A novel and efficient fungal delignification strategy based on versatile peroxidase for lignocellulose bioconversion. BIOTECHNOLOGY FOR BIOFUELS 2017; 10:218. [PMID: 28924453 PMCID: PMC5598073 DOI: 10.1186/s13068-017-0906-x] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 09/07/2017] [Indexed: 05/15/2023]
Abstract
BACKGROUND The selective lignin-degrading white-rot fungi are regarded to be the best lignin degraders and have been widely used for reducing the saccharification recalcitrance of lignocellulose. However, the biological delignification and conversion of lignocellulose in biorefinery is still limited. It is necessary to develop novel and more efficient bio-delignification systems. RESULTS Physisporinus vitreus relies on a new versatile peroxidase (VP)-based delignification strategy to remove enzymatic recalcitrance of corn stover efficiently, so that saccharification of corn stover was significantly enhanced to 349.1 mg/g biomass (yield of glucose) and 91.5% (hydrolysis yield of cellulose) at 28 days, as high as levels reached by thermochemical treatment. Analysis of the lignin structure using pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS) showed that the total abundance of lignin-derived compounds decreased by 54.0% and revealed a notable demethylation during lignin degradation by P. vitreus. Monomeric and dimeric lignin model compounds were used to confirm the ligninolytic capabilities of extracellular ligninases secreted by P. vitreus. The laccase (Lac) from P. vitreus could not oxidize nonphenolic lignin compounds and polymerized β-O-4 and 5-5' dimers to precipitate which had a negative effect on the enzymatic hydrolysis of corn stover in vitro. However, the VP from P. vitreus could oxidize both phenolic and nonphenolic lignin model compounds as well as break the β-O-4 and 5-5' dimers into monomeric compounds, which were measured by high-performance liquid chromatography-electrospray ionization-mass spectrometry (LC-ESI-MS). Moreover, we showed that addition of purified VP in vitro improved the enzymatic hydrolysis of corn stover by 14.1%. CONCLUSIONS From the highly efficient system of enzymatic recalcitrance removal by new white-rot fungus, we identified a new delignification strategy based on VP which could oxidize both phenolic and nonphenolic lignin units and break different linkages in lignin. In addition, this is the first evidence that VP could break 5-5' linkage efficiently in vitro. Moreover, VP improved the enzymatic hydrolysis of corn stover in vitro. The remarkable lignin-degradative potential makes VP attractive for biotechnological applications.
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Affiliation(s)
- Wen Kong
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074 People’s Republic of China
| | - Xiao Fu
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074 People’s Republic of China
| | - Lei Wang
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074 People’s Republic of China
| | - Ahmad Alhujaily
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074 People’s Republic of China
| | - Jingli Zhang
- College of Life Science and Technology, WuHan University of Technology, Wuhan, 430070 People’s Republic of China
| | - Fuying Ma
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074 People’s Republic of China
| | - Xiaoyu Zhang
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074 People’s Republic of China
| | - Hongbo Yu
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074 People’s Republic of China
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Recovery of Phenolic Acid and Enzyme Production from Corn Silage Biologically Treated by Trametes versicolor. Appl Biochem Biotechnol 2016; 181:948-960. [DOI: 10.1007/s12010-016-2261-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 09/19/2016] [Indexed: 11/25/2022]
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Palazzolo MA, Kurina-Sanz M. Microbial utilization of lignin: available biotechnologies for its degradation and valorization. World J Microbiol Biotechnol 2016; 32:173. [PMID: 27565783 DOI: 10.1007/s11274-016-2128-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 08/12/2016] [Indexed: 10/21/2022]
Abstract
Lignocellulosic biomasses, either from non-edible plants or from agricultural residues, stock biomacromolecules that can be processed to produce both energy and bioproducts. Therefore, they become major candidates to replace petroleum as the main source of energy. However, to shift the fossil-based economy to a bio-based one, it is imperative to develop robust biotechnologies to efficiently convert lignocellulosic streams in power and platform chemicals. Although most of the biomass processing facilities use celluloses and hemicelluloses to produce bioethanol and paper, there is no consolidated bioprocess to produce valuable compounds out of lignin at industrial scale available currently. Usually, lignin is burned to provide heat or it remains as a by-product in different streams, thus arising environmental concerns. In this way, the biorefinery concept is not extended to completion. Due to Nature offers an arsenal of biotechnological tools through microorganisms to accomplish lignin valorization or degradation, an increasing number of projects dealing with these tasks have been described recently. In this review, outstanding reports over the last 6 years are described, comprising the microbial utilization of lignin to produce a variety of valuable compounds as well as to diminish its ecological impact. Furthermore, perspectives on these topics are given.
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Affiliation(s)
- Martín A Palazzolo
- Instituto de Investigaciones en Tecnología Química, Universidad Nacional de San Luis, CONICET, Area de Química Orgánica, FQByF, 5700, San Luis, Argentina.
| | - Marcela Kurina-Sanz
- Instituto de Investigaciones en Tecnología Química, Universidad Nacional de San Luis, CONICET, Area de Química Orgánica, FQByF, 5700, San Luis, Argentina
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