生物技术进展 ›› 2025, Vol. 15 ›› Issue (6): 1050-1056.DOI: 10.19586/j.2095-2341.2025.0069

• 研究论文 • 上一篇    下一篇

一株产木质纤维素酶新菌株的筛选、鉴定及产酶特性研究

丁楠1,2(), 丁洋3, 杨皓天4, 刘畅3, 黄世臣1(), 傅民杰5()   

  1. 1.延边大学地理与海洋科学学院,吉林 珲春 133300
    2.大连理工大学化工学院,辽宁 大连 116024
    3.延边大学药学院,吉林 延吉 133002
    4.延边大学理学院,吉林 延吉 133002
    5.延边大学农学院,吉林 延吉 133002
  • 收稿日期:2025-06-10 接受日期:2025-08-13 出版日期:2025-11-25 发布日期:2026-01-04
  • 通讯作者: 黄世臣,傅民杰
  • 作者简介:丁楠 E-mail: 1695116250@qq.com
  • 基金资助:
    国家自然科学基金项目(32460317)

Screening, Identification of a Novel Lignocellulolytic Enzyme-degrading Strain and its Enzyme Characteristics

Nan DING1,2(), Yang DING3, Haotian YANG4, Chang LIU3, Shichen HUANG1(), Minjie FU5()   

  1. 1.College of Geography and Ocean Sciences,Yanbian University,Jilin Hunchun 133300,China
    2.School of Chemical Engineering,Dalian University of Technology,Liaoning Dalian 116024,China
    3.College of Pharmacy,Yanbian University,Jilin Yanji 133002,China
    4.College of Science,Yanbian University,Jilin Yanji 133002,China
    5.College of Agriculture,Yanbian University,Jilin Yanji 133002,China
  • Received:2025-06-10 Accepted:2025-08-13 Online:2025-11-25 Published:2026-01-04
  • Contact: Shichen HUANG,Minjie FU

摘要:

木质纤维素是一种可再生的、产量巨大的生物资源,其有效利用对实现双碳战略目标具有很高的社会和生态价值。寻找具有高活性的木质纤维素降解微生物并提高其转化效率是现实可行的有效解决途径之一。木质纤维素酶是能够分解纤维素的一大类酶,研究该酶系的组成及其特性是实现利用微生物分解木质纤维素技术推广的理论基础。利用以羧甲基纤维素钠为唯一碳源的选择性培养基,从土壤中筛选目标菌株并进行了鉴定,同时对目标菌株的产酶特性做了初步研究。目的菌株被鉴定且命名为赭曲霉ZJ-20(Aspergillus ochraceus ZJ-20),培养最适温度为28 ℃,最适pH为7,最适碳源为葡萄糖,最适氮源有以下3种情况:以硫酸铵为氮源时,滤纸酶活力最大;以蛋白胨为氮源时,纤维素酶活力最大;以硝酸钾为氮源时,β-葡萄糖苷酶活力最大。在最适条件下,该菌株的滤纸酶、纤维素酶、β-葡萄糖苷酶酶活力均比初始酶活力分别提高了3.00、2.66、2.82倍。研究成功筛选出的赭曲霉ZJ-20,为木质纤维素资源化利用提供了优质菌种资源,并为降低生物炼制成本和推动双碳目标下绿色能源发展提供了重要技术支撑。

关键词: 木质纤维素, 滤纸酶, 纤维素酶, β-葡萄糖苷酶, 赭曲霉

Abstract:

Lignocellulose, as an abundant and renewable bioresource, holds significant societal and ecological value for achieving carbon neutrality goals. Harnessing highly efficient lignocellulose-degrading microorganisms represents a promising solution to enhance conversion efficiency. Lignocellulases are a large class of enzymes that can decompose cellulose. Studying the composition and characteristics of this enzyme system is the theoretical basis for promoting the use of microbial decomposition of lignocellulose technology. In this study, we isolated a fungal strain (designated Aspergillus ochraceus ZJ-20) from soil using sodium carboxymethyl cellulose as the sole carbon source. Preliminary characterization revealed optimal activity at 28 ℃ and pH7.0, with glucose demonstrating superior performance as carbon source. Nitrogen source specificity was observed: ammonium sulfate maximized filter paper activity (FPA), peptone enhanced endoglucanase production, and potassium nitrate optimized β-glucosidase activity. Under optimal conditions, the activities of filter paper enzyme, cellulase, and β-glucosidase of this strain increased by 3.00, 2.66, and 2.82 times, respectively, compared to the initial enzyme activity. The successful screening of A. ochraceus ZJ-20 in this study provides high-quality bacterial resources for the resource utilization of lignocellulose, offers important technical support for reducing the cost of biorefinery and promote the development of green energy under the dual carbon goal.

Key words: lignocellulose, paper filtering enzyme, cellulase, β-glucosidase, Aspergillus ochraceus

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