Abstract
To improve the efficiency of enzymatic saccharification for lignocellulose, an efficient crude multi-enzyme was produced by Trichoderma reesei using corncob, a low cost inducer. Expression of cbh1, bgl1, egl1, xyn1 and positive regulator xyr1 induced by corncob increased significantly compared to that by cellulose. After 120 h induction by corncob, enzymatic activities on filter, CMC, β-glucose and xylan increased 86.5, 46.9, 120.9 and 291.2% compared to those induced by cellulose, and the concentration of secreted protein increased by 120.8%. FPase:β-glucosidase and FPase:xylanase values in crude multi-enzyme I (ECI, induced by corncob) were higher than that in crude multi-enzyme II (ECII, induced by cellulose). Under the same hydrolysis conditions, the volume dosage of ECI was only half of ECII, but ECI still showed a maximum of 12.5 and 33.4% higher than ECII in the total reducing sugar and glucose yield in lignocellulose hydrolysis. Corncob could be a candidate for low cost production of multi-enzyme for efficient lignocellulose degradation, and this work could guide the genetic modification of T. reesei to obtain efficient multi-enzyme for lignocellulose hydrolysis.
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Acknowledgements
The authors acknowledge the Key Project of Natural Science Foundation of Tianjin (16JCZDJC31800), and the National Natural Science Fund of China (31770625).
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This study was focused on analyzing the efficient crude multi-enzyme produced by Trichoderma reesei using corncob for the hydrolysis of lignocellulose. Every parts of the research did not involve human participants and other animals. Our manuscript complies with the Ethical Rules applicable for 3 Biotech.
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Jiang, F., Ma, L., Cai, R. et al. Efficient crude multi-enzyme produced by Trichoderma reesei using corncob for hydrolysis of lignocellulose. 3 Biotech 7, 339 (2017). https://doi.org/10.1007/s13205-017-0982-4
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DOI: https://doi.org/10.1007/s13205-017-0982-4