Abstract:
:This study proposes an innovative strategy of lignocellulose biodegradation by Inonotus obliquus under solid-state fermentation in extracting Eucommia ulmoides trans-1,4-polyisoprene (EUG) and producing reducing sugars efficiently. EUG and sugars were obtained through the white rot fungal pretreatment of E. ulmoides leaves, ultrasound-assisted solvent extraction, and enzymatic saccharification. After mere 2-day fermentation, the loss of lignin, cellulose, and hemicelluloses of the leaves achieved 7.11%, 3.47%, and 6.44%, respectively due to the high activity levels of manganese peroxidase (MnP, 973 IU g-1) and lignin peroxidase (LiP, 1341 IU g-1) produced by the fungus. The breakdown of fibrous networks brought higher yields of EUG and reducing sugars. The highest extraction yield of EUG was 4.86% from the 2-day fermented leaves, 31.4% greater than that from the control (3.69%). Meanwhile, the leaf residues after EUG extraction released 97.8 mg g-1 reducing sugars with enzymatic saccharification, 77.5% greater than that from the control (55.1 mg g-1). The results demonstrated that I. obliquus could use E. ulmoides leaves as substrate to produce high-activity-level ligninolytic enzymes in a very short time and the lignocellulose selective degradation of E. ulmoides leaves enhanced the yields of EUG and reducing sugars.
journal_name
Appl Biochem Biotechnoljournal_title
Applied biochemistry and biotechnologyauthors
Qian S,Zhang C,Zhu Z,Huang P,Xu Xdoi
10.1007/s12010-020-03347-1subject
Has Abstractpub_date
2020-11-01 00:00:00pages
719-733issue
3eissn
0273-2289issn
1559-0291pii
10.1007/s12010-020-03347-1journal_volume
192pub_type
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