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Liu F, Ma L, Chen W, Wang S, Wei C, Huang C, Jiang Y, Wang S, Lin H, Chen J, Wang G, Xie B, Yuan Z. Preliminary study on the anti-CO 2 stress and growth ability of hypsizygus marmoreus mutant strain HY68. BMC Microbiol 2023; 23:293. [PMID: 37845623 PMCID: PMC10580535 DOI: 10.1186/s12866-023-03050-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 10/09/2023] [Indexed: 10/18/2023] Open
Abstract
BACKGROUND A high concentration of CO2 will stagnate the development of the newly formed primordia of Hypsizygus marmoreus, hinder the development of the mushroom cap, thereby inhibiting the normal differentiation of the fruiting body. Moreover, in the previous experiment, our research group obtained the mutant strain HY68 of H. marmoreus, which can maintain normal fruiting under the condition of high concentration of CO2. Our study aimed to evaluate the CO2 tolerance ability of the mutant strain HY68, in comparison with the starting strain HY61 and the control strain HY62. We analyzed the mycelial growth of these strains under various conditions, including different temperatures, pH levels, carbon sources, and nitrogen sources, and measured the activity of the cellulose enzyme. Additionally, we identified and predicted β-glucosidase-related genes in HY68 and analyzed their gene and protein structures. RESULTS Our results indicate that HY68 showed superior CO2 tolerance compared to the other strains tested, with an optimal growth temperature of 25 °C and pH of 7, and maltose and beef paste as the ideal carbon and nitrogen sources, respectively. Enzyme activity assays revealed a positive correlation between β-glucosidase activity and CO2 tolerance, with Gene14147 identified as the most closely related gene to this activity. Inbred strains of HY68 showed trait segregation for CO2 tolerance. CONCLUSIONS Both HY68 and its self-bred offspring could tolerate CO2 stress. The fruiting period of the strains resistant to CO2 stress was shorter than that of the strains not tolerant to CO2 stress. The activity of β-GC and the ability to tolerate CO2 were more closely related to the growth efficiency of fruiting bodies. This study lays the foundation for understanding how CO2 regulates the growth of edible fungi, which is conducive to the innovation of edible fungus breeding methods. The application of the new strain HY68 is beneficial to the research of energy-saving production in factory cultivation.
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Affiliation(s)
- Fang Liu
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China.
| | - Lin Ma
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Weifeng Chen
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Sifan Wang
- Future Technology Academy, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Chuanzheng Wei
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Chengpo Huang
- Fujian Wanchen Biotechnology Group Stock Co., Ltd., Zhangzhou, Zhangpu, Fujian, 363299, China
| | - Yimin Jiang
- Fujian Wanchen Biotechnology Group Stock Co., Ltd., Zhangzhou, Zhangpu, Fujian, 363299, China
| | - Song Wang
- Fujian Wanchen Biotechnology Group Stock Co., Ltd., Zhangzhou, Zhangpu, Fujian, 363299, China
| | - Hongyan Lin
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Jian Chen
- Fuzhou Institute of Agricultural Sciences, Fuzhou, Fujian, 350002, China
| | - Gang Wang
- Wetland College, Yancheng Teachers College, Yancheng, Jiangsu, 224008, China.
| | - Baogui Xie
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China.
| | - Zongsheng Yuan
- College of Geography and Oceanography, Minjiang University, Fuzhou, Fujian, 350108, China.
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Pereira J, Cachinho A, de Melo MMR, Silva CM, Lemos PC, Xavier AMRB, Serafim LS. Enzymatic Potential of Filamentous Fungi as a Biological Pretreatment for Acidogenic Fermentation of Coffee Waste. Biomolecules 2022; 12:biom12091284. [PMID: 36139123 PMCID: PMC9496503 DOI: 10.3390/biom12091284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 09/07/2022] [Accepted: 09/08/2022] [Indexed: 12/01/2022] Open
Abstract
Spent coffee grounds (SCGs) are a promising substrate that can be valorized by biotechnological processes, such as for short-chain organic acid (SCOA) production, but their complex structure implies the application of a pretreatment step to increase their biodegradability. Physicochemical pretreatments are widely studied but have multiple drawbacks. An alternative is the application of biological pretreatments that include using fungi Trametes versicolor and Paecilomyces variotii that naturally can degrade complex substrates such as SCGs. This study intended to compare acidic and basic hydrolysis and supercritical CO2 extraction with the application of these fungi. The highest concentration of SCOAs, 2.52 gCOD/L, was achieved after the acidification of SCGs pretreated with acid hydrolysis, but a very similar result, 2.44 gCOD/L, was obtained after submerged fermentation of SCGs by T. versicolor. This pretreatment also resulted in the best acidification degree, 48%, a very promising result compared to the 13% obtained with the control, untreated SCGs, highlighting the potential of biological pretreatments.
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Affiliation(s)
- Joana Pereira
- Department of Chemistry, CICECO-Aveiro Institute of Materials, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Ana Cachinho
- Department of Chemistry, CICECO-Aveiro Institute of Materials, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Marcelo M. R. de Melo
- Department of Chemistry, CICECO-Aveiro Institute of Materials, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Carlos M. Silva
- Department of Chemistry, CICECO-Aveiro Institute of Materials, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Paulo C. Lemos
- LAQV-REQUIMTE, Faculty of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Ana M. R. B. Xavier
- Department of Chemistry, CICECO-Aveiro Institute of Materials, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Luísa S. Serafim
- Department of Chemistry, CICECO-Aveiro Institute of Materials, Universidade de Aveiro, 3810-193 Aveiro, Portugal
- Correspondence:
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González-Rodríguez S, Lu-Chau TA, Trueba-Santiso A, Eibes G, Moreira MT. Bundling the removal of emerging contaminants with the production of ligninolytic enzymes from residual streams. Appl Microbiol Biotechnol 2022; 106:1299-1311. [PMID: 35075520 PMCID: PMC8816780 DOI: 10.1007/s00253-022-11776-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 12/09/2021] [Accepted: 01/09/2022] [Indexed: 12/20/2022]
Abstract
Abstract Enzymes offer interesting features as biological catalysts for industry: high specificity, activity under mild conditions, accessibility, and environmental friendliness. Being able to produce enzymes in large quantities and having them available in a stable and reusable form reduces the production costs of any enzyme-based process. Agricultural residues have recently demonstrated their potential as substrates to produce ligninolytic enzymes by different white rot fungi. In this study, the biotechnological production of a manganese peroxidase (MnP) by Irpex lacteus was conducted through solid-state fermentation (SSF) with wheat straw as substrate and submerged fermentation (SmF) employing wheat straw extract (WSE). The obtained enzyme cocktail also showed manganese-independent activity (MiP), related to the presence of a short MnP and a dye-decolorizing peroxidase (DyP) which was confirmed by shotgun proteomic analyses. In view of the enhanced production of ligninolytic enzymes in SmF, different parameters such as WSE concentration and nitrogen source were evaluated. The highest enzyme titers were obtained with a medium formulated with glucose and peptone (339 U/L MnP and 15 U/L MiP). The scale-up to a 30 L reactor achieved similar activities, demonstrating the feasibility of enzyme production from the residual substrate at different production scales. Degradation of five emerging pollutants was performed to demonstrate the high oxidative capacity of the enzyme. Complete removal of hormones and bisphenol A was achieved in less than 1 h, whereas almost 30% degradation of carbamazepine was achieved in 24 h, which is a significant improvement compared to previous enzymatic treatments of this compound. Key points • Wheat straw extract is suitable for the growth of I. lacteus. • The enzyme cocktail obtained allows the degradation of emerging contaminants. • Mn-dependent and Mn-independent activities increases the catalytic potential. Graphical abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1007/s00253-022-11776-7.
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Cardoso WS, Queiroz PV, Tavares GP, Santos FA, Soares FEDF, Kasuya MCM, Queiroz JHD. Multi-enzyme complex of white rot fungi in saccharification of lignocellulosic material. Braz J Microbiol 2018; 49:879-884. [PMID: 30150084 PMCID: PMC6175720 DOI: 10.1016/j.bjm.2018.05.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 05/14/2018] [Accepted: 05/18/2018] [Indexed: 11/28/2022] Open
Abstract
The multi-enzyme complex (crude extract) of white rot fungi Pleurotus ostreatus, Pleurotus eryngii, Trametes versicolor, Pycnosporus sanguineus and Phanerochaete chrysosporium were characterized, evaluated in the hydrolysis of pretreated pulps of sorghum straw and compared efficiency with commercial enzyme. Most fungi complexes had better hydrolysis rates compared with purified commercial enzyme.
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Affiliation(s)
| | | | | | - Fernando Almeida Santos
- Universidade Estadual do Rio Grande do Sul, Departamento de Bioenergia, Porto Alegre, RS, Brazil
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