|本期目录/Table of Contents|

[1]王永伦,余克非,郑展望.1株耐高温纤维素降解菌发酵条件优化与秸秆降解应用[J].江苏农业科学,2023,51(19):229-236,244.
 Wang Yonglun,et al.Optimization of fermentation conditions of a cellulose degrading strain with high temperature resistance and its application in straw degradation[J].Jiangsu Agricultural Sciences,2023,51(19):229-236,244.
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1株耐高温纤维素降解菌发酵条件优化与秸秆降解应用(PDF)
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《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:
第51卷
期数:
2023年第19期
页码:
229-236,244
栏目:
资源与环境
出版日期:
2023-10-05

文章信息/Info

Title:
Optimization of fermentation conditions of a cellulose degrading strain with high temperature resistance and its application in straw degradation
作者:
王永伦余克非郑展望
浙江农林大学环境与资源学院,浙江杭州 310000
Author(s):
Wang Yonglunet al
关键词:
纤维素降解菌耐高温发酵条件纤维素秸秆降解
Keywords:
-
分类号:
S141.4;S182
DOI:
-
文献标志码:
A
摘要:
采用刚果红培养基和高温筛选的方法从小麦秸秆模拟堆肥中分离出1株耐高温枯草芽孢杆菌属的单菌株Bacillus subtilis 03,通过16S rDNA序列分析对该菌株进行分子生物学鉴定;采用单因素试验和正交试验法对菌株的发酵条件进行优化。通过对高温发酵过程中秸秆降解率和纤维素酶活性的测定,评估目标菌株在高温下对秸秆的降解性能。结果表明,分离所得的目标菌株 Bacillus subtilis 03为枯草芽孢杆菌属(GenBank 登录号:SUB12359776),此菌株可在60 ℃下降解纤维素;高温下该菌株最适产酶条件:培养时间12 h,羧甲基纤维素钠的浓度14 g/L,硫酸铵浓度 1.4 g/L,接种量4%,pH值为7,发酵周期8 d,钾离子(K+)浓度为0.08 μmol/L,钴离子(Co2+)浓度为0.12 μmol/L,镁离子(Mg2+)浓度为0.12 μmol/L,钙离子(Ca2+)浓度为0.12 μmol/L。另外,菌株Bacillus subtilis 03具有良好的耐碱性特征,碱性条件下仍可产生较高的纤维素酶活,所产纤维素酶的酶促反应活性和稳定性在pH值为10时仍能分别保留最适pH值(pH值为7)下的73.28%、68.14%。菌株优化固态发酵条件接种于秸秆堆肥36 d后,秸秆减量达到32.72%。在堆肥过程中菌株降解秸秆产生的腐殖酸使堆肥pH值产生了显著变化而且高温阶段菌株数量约为升温阶段末期的87.5%,pH值和菌株数量变化都显示了该菌株在高温下对秸秆的强降解能力。
Abstract:
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备注/Memo

备注/Memo:
收稿日期:2023-04-11
基金项目:浙江省重点研发计划(编号:2020C02009、2021C03190);高等学校学科创新引智计划(编号:D18008)。
作者简介:王永伦(1999—),男,安徽合肥人,硕士研究生,主要从事秸秆资源化利用研究。E-mail:2272386353@qq.com。
通信作者:郑展望,博士,教授,主要从事农村污水处理研究。E-mail:zhengzw@zafu.edu.cn。
更新日期/Last Update: 2023-10-05