摘要
玉米秸秆组成上的不均一性导致了其高值化利用的困难,本研究旨在找出一株对杂细胞有高度选择性降解能力的菌种,用于降解玉米秸秆中的杂细胞,解决其组织结构不均一的问题,剩下的纤维则可用于制浆造纸。采用从染凤梨病甘蔗秆分离出的7种病原真菌和绿色木霉分别对汽爆玉米秸秆梳理过筛后分成的纤维细胞和杂细胞进行降解,结果显示:8种真菌对杂细胞的降解能力普遍大于对纤维细胞的降解能力。通过测定酶活和扫描电镜观察,得出其原因是与菌种所产酶活以及原料组成结构有关。其中,菌种C-2对杂细胞的选择性降解能力最强,杂细胞和纤维细胞的失重率相差17.88%。
It is difficult to be utilized at high-value for corn straw, because of its heterogeneity in constitution. This paper aims to find a fungus which can selectively degrade parenchyma cell of corn straw, and the residual fiber can be used in pulping and papermaking. In this paper, seven pathogenic fungi separated from sugarcane with pineapple disease, and Trichoderma viride were used to degrade fiber and parenchyma cell carded and sifted from steam-exploded corn straw respectively. It was shown that the degradabilities of these 8 fungi to parenehyma cell were more than those to fiber. The reason of above difference was concerned with the fungi enzyme activity and structure of material by determination of enzyme activity and study of scanning electron micrograph. Among these 8 fungi, fungus C-2 had the best selective degradation to parenchyma cell, and the difference of weight loss rate of parenchyma cell with fiber was 17.88 %.
出处
《生物质化学工程》
CAS
2008年第5期9-14,共6页
Biomass Chemical Engineering
基金
国家973计划(2004CB719700)
关键词
汽爆玉米秸秆
真菌
绿色木霉
选择性降解
steam-exploded corn straw
fungus
Trichoderma viride
selective degradation
作者简介
曾薇（1983-），女，四川广安人，硕士生，从事纤维素生物技术研究通讯作者：陈洪章，山东定陶人，研究员，博士生导师，从事纤维素生物技术研究；联系电话：010—82627067；E-mail：hzehen@home．ipe.ac.cn.
