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Nisar K, Abdullah R, Kaleem A, Iqtedar M, Aftab M, Saleem F. Purification, Characterization And Thermodynamic Analysis Of Cellulases Produced From Thermomyces Dupontii And Its Industrial Applications. Saudi J Biol Sci 2022; 29:103483. [DOI: 10.1016/j.sjbs.2022.103483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 09/13/2022] [Accepted: 10/25/2022] [Indexed: 11/06/2022] Open
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Yang H, Zhao Y, Ma J, Rong Z, Chen J, Wang Y, Zheng X, Ye W. Wheat Straw Return Influences Soybean Root-Associated Bacterial and Fungal Microbiota in a Wheat-Soybean Rotation System. Microorganisms 2022; 10:microorganisms10030667. [PMID: 35336243 PMCID: PMC8951542 DOI: 10.3390/microorganisms10030667] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 02/27/2022] [Accepted: 03/02/2022] [Indexed: 01/16/2023] Open
Abstract
Roots hold complex microbial communities at the soil–root interface, which can affect plant nutrition, growth, and health. Although the composition of plant microbiomes has been extensively described for various plant species and environments, little is known about the effect of wheat straw return (WSR) on the soybean root microbiota. We used Illumina-based 16S rRNA and ITS amplicon sequencing to track changes in bacterial and fungal microbiota in bulk soil and soybean rhizosphere, rhizoplane, s1and endosphere during the third and fourth years after implementing WSR in a wheat–soybean rotation system. The results revealed that WSR had a greater impact on fungal communities than bacterial communities, particularly in bulk soil, rhizosphere, and rhizoplane. WSR enriched the relative abundance of cellulose-degrading fungi (e.g., Acremonium, Trichoderma, and Myrmecridium, among which Trichoderma also had antimicrobial activity), saprotroph (e.g., Exophiala), and nitrogen cycling bacteria (e.g., Chryseolinea). Furthermore, WSR depleted the relative abundance of pathogenic fungi (e.g., Fusarium and Alternaria). These data revealed for the first time that WSR had diverse effects on soybean root-associated microbial community composition, not only in soil but also in the rhizosphere, rhizoplane, and endosphere.
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Affiliation(s)
- Hongjun Yang
- Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China; (H.Y.); (Y.Z.); (J.M.); (Z.R.); (J.C.); (Y.W.); (X.Z.)
- Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Nanjing Agricultural University, Nanjing 210095, China
- College of Agronomy and Horticulture, Jiangsu Vocational College of Agriculture and Forestry, Zhenjiang 212400, China
| | - Yao Zhao
- Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China; (H.Y.); (Y.Z.); (J.M.); (Z.R.); (J.C.); (Y.W.); (X.Z.)
- Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Nanjing Agricultural University, Nanjing 210095, China
| | - Jiaxin Ma
- Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China; (H.Y.); (Y.Z.); (J.M.); (Z.R.); (J.C.); (Y.W.); (X.Z.)
- Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Nanjing Agricultural University, Nanjing 210095, China
| | - Zhenyang Rong
- Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China; (H.Y.); (Y.Z.); (J.M.); (Z.R.); (J.C.); (Y.W.); (X.Z.)
- Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Nanjing Agricultural University, Nanjing 210095, China
| | - Jiajia Chen
- Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China; (H.Y.); (Y.Z.); (J.M.); (Z.R.); (J.C.); (Y.W.); (X.Z.)
- Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Nanjing Agricultural University, Nanjing 210095, China
- College of Landscape Architecture, Jiangsu Vocational College of Agriculture and Forestry, Zhenjiang 212400, China
| | - Yuanchao Wang
- Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China; (H.Y.); (Y.Z.); (J.M.); (Z.R.); (J.C.); (Y.W.); (X.Z.)
- Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Nanjing Agricultural University, Nanjing 210095, China
| | - Xiaobo Zheng
- Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China; (H.Y.); (Y.Z.); (J.M.); (Z.R.); (J.C.); (Y.W.); (X.Z.)
- Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Nanjing Agricultural University, Nanjing 210095, China
| | - Wenwu Ye
- Key Laboratory of Plant Immunity, Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China; (H.Y.); (Y.Z.); (J.M.); (Z.R.); (J.C.); (Y.W.); (X.Z.)
- Key Laboratory of Soybean Disease and Pest Control (Ministry of Agriculture and Rural Affairs), Nanjing Agricultural University, Nanjing 210095, China
- Correspondence:
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Prieto A, de Eugenio L, Méndez-Líter JA, Nieto-Domínguez M, Murgiondo C, Barriuso J, Bejarano-Muñoz L, Martínez MJ. Fungal glycosyl hydrolases for sustainable plant biomass valorization: Talaromyces amestolkiae as a model fungus. Int Microbiol 2021; 24:545-558. [PMID: 34417929 DOI: 10.1007/s10123-021-00202-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 08/03/2021] [Accepted: 08/04/2021] [Indexed: 11/26/2022]
Abstract
As the main decomposers and recyclers in nature, fungi secrete complex mixtures of extracellular enzymes for degradation of plant biomass, which is essential for mobilization of the organic carbon fixed by the photosynthesis in vegetal cells. Biotechnology can emulate the closed natural biological cycles, using lignocellulosic biomass as a renewable resource and lignocellulolytic fungal enzymes as catalysts to sustainably produce consumer goods. Cellulose and hemicellulose are the major polysaccharides on Earth, and the main enzymes involved in their hydrolytic depolymerization are cellulases (endoglucanases, cellobiohydrolases, and β-glucosidases) and hemicellulases (mainly endoxylanases and β-xylosidases). This work will focus on the enzymes secreted by the filamentous ascomycete Talaromyces amestolkiae and on some of their biotechnological applications. Their excellent hydrolytic activity was demonstrated by the partial degradation of xylans to prebiotic oligosaccharides by the endoxylanase XynN, or by the saccharification of lignocellulosic wastes to monosaccharides (fermentable to ethanol) either by the whole secretomes or by isolated enzymes used as supplements of commercial cocktails. However, apart from their expected hydrolytic activity, some of the β-glycosidases produced by this strain catalyze the transfer of a sugar molecule to specific aglycons by transglycosylation. As the synthesis of customized glycoconjugates is a major goal for biocatalysis, mutant variants of the β-xyloxidase BxTW1 and the ß-glucosidases BGL-1 and BGL-2 were obtained by directed mutagenesis, substantially improving the regioselective production yields of bioactive glycosides since they showed reduced or null hydrolytic activity.
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Affiliation(s)
- Alicia Prieto
- Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), C/ Ramiro de Maeztu 9, 28022, Madrid, Spain.
| | - Laura de Eugenio
- Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), C/ Ramiro de Maeztu 9, 28022, Madrid, Spain
| | - Juan A Méndez-Líter
- Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), C/ Ramiro de Maeztu 9, 28022, Madrid, Spain
| | - Manuel Nieto-Domínguez
- Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), C/ Ramiro de Maeztu 9, 28022, Madrid, Spain
| | - Carlos Murgiondo
- Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), C/ Ramiro de Maeztu 9, 28022, Madrid, Spain
| | - Jorge Barriuso
- Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), C/ Ramiro de Maeztu 9, 28022, Madrid, Spain
| | - Lara Bejarano-Muñoz
- Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), C/ Ramiro de Maeztu 9, 28022, Madrid, Spain
| | - María Jesús Martínez
- Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), C/ Ramiro de Maeztu 9, 28022, Madrid, Spain.
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Méndez-Líter JA, de Eugenio LI, Nieto-Domínguez M, Prieto A, Martínez MJ. Hemicellulases from Penicillium and Talaromyces for lignocellulosic biomass valorization: A review. BIORESOURCE TECHNOLOGY 2021; 324:124623. [PMID: 33434871 DOI: 10.1016/j.biortech.2020.124623] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/21/2020] [Accepted: 12/23/2020] [Indexed: 05/26/2023]
Abstract
The term hemicellulose groups different polysaccharides with heterogeneous structures, mannans, xyloglucans, mixed-linkage β-glucans and xylans, which differ in their backbone and branches, and in the type and distribution of glycosidic linkages. The enzymatic degradation of these complex polymers requires the concerted action of multiple hemicellulases and auxiliary enzymes. Most commercial enzymes are produced by Trichoderma and Aspergillus species, but recent studies have disclosed Penicillium and Talaromyces as promising sources of hemicellulases. In this review, we summarize the current knowledge on the hemicellulolytic system of these genera, and the role of hemicellulases in the disruption and synthesis of glycosidic bonds. In both cases, the enzymes from Penicillium and Talaromyces represent an interesting alternative for valorization of lignocellulosic biomass in the current framework of circular economy.
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Affiliation(s)
- Juan A Méndez-Líter
- Biotechnology for Lignocellulosic Biomass Group, Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), c/ Ramiro de Maeztu 9, 28040 Madrid, Spain
| | - Laura I de Eugenio
- Biotechnology for Lignocellulosic Biomass Group, Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), c/ Ramiro de Maeztu 9, 28040 Madrid, Spain
| | - Manuel Nieto-Domínguez
- Biotechnology for Lignocellulosic Biomass Group, Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), c/ Ramiro de Maeztu 9, 28040 Madrid, Spain
| | - Alicia Prieto
- Biotechnology for Lignocellulosic Biomass Group, Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), c/ Ramiro de Maeztu 9, 28040 Madrid, Spain
| | - María Jesús Martínez
- Biotechnology for Lignocellulosic Biomass Group, Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), c/ Ramiro de Maeztu 9, 28040 Madrid, Spain.
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Sun YX, Shen BB, Han HY, Lu Y, Zhang BX, Gao YF, Hu BZ, Hu XM. Screening of potential IL-tolerant cellulases and their efficient saccharification of IL-pretreated lignocelluloses. RSC Adv 2018; 8:30957-30965. [PMID: 35548722 PMCID: PMC9085512 DOI: 10.1039/c8ra05729j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 08/22/2018] [Indexed: 11/21/2022] Open
Abstract
Lignocellulosic biomass as one of the most abundant and renewable resources has great potential for biofuel production. The complete conversion of biomass to biofuel is achieved through the effective pretreatment process and the following enzyme saccharification. Ionic liquids (ILs) are considered as a green solvent for lignocellulose pretreatment. However, ILs exhibit an inhibitory effect on cellulase activity, leading to a subsequent decrease in the efficiency of saccharification. The screening of new potential IL-tolerant cellulases is important. In the current study, a fungal strain with a relatively high cellulase production was isolated and identified as Penicillium oxalicum HC6. The culture conditions were optimized using corn stover and peptone as the carbon source and nitrogen source at pH 4.0 and 30 °C with an inoculation size of 2% (v/v) for 8 days. It was found that P. oxalicum HC6 exhibited potential salt tolerance with the increase of the enzyme production at a salt concentration of 5.0% (w/v). In addition, high enzyme activities were obtained at pH 4.0–6.0 and 50–65 °C. The crude enzyme from P. oxalicum HC6 with good thermal stability was also stable in the presence of salt and ILs. Good yields of reducing sugar were obtained by the crude enzyme from P. oxalicum HC6 after the saccharification of corn stover that was pretreated by ILs. P. oxalicum HC6 with potentially salt-tolerant and IL-tolerant enzymes has great potential application in the enzymatic saccharification of lignocellulose. Lignocellulosic biomass as one of the most abundant and renewable resources has great potential for biofuel production.![]()
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Affiliation(s)
- Yi-Xin Sun
- College of Life Science
- Northeast Agricultural University
- Harbin
- China
| | - Bing-Bing Shen
- College of Life Science
- Northeast Agricultural University
- Harbin
- China
| | - Hui-Ying Han
- College of Life Science
- Northeast Agricultural University
- Harbin
- China
| | - Yuan Lu
- College of Life Science
- Northeast Agricultural University
- Harbin
- China
| | - Bi-Xian Zhang
- Heilongjiang Academy of Agricultural Sciences
- Harbin
- China
| | - Yun-Fei Gao
- Heilongjiang Academy of Agricultural Sciences
- Harbin
- China
| | | | - Xiao-Mei Hu
- College of Life Science
- Northeast Agricultural University
- Harbin
- China
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