Biotechnology Bulletin ›› 2015, Vol. 31 ›› Issue (5): 20-26.doi: 10.13560/j.cnki.biotech.bull.1985.2015.05.004

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Advances in Research of Straw Degradation with Cellulase and Its Genetic Engineering

Zhang Senxiang, Yin Xiaoyan, Gong Zhiwei, Yang Zhonghua, Hou Yali, Zhou Wei   

  1. (School of Chemical Engineering and Technology,Wuhan University of Science and Technology,Wuhan 430081)
  • Received:2014-08-09 Online:2015-05-18 Published:2015-05-18

Abstract: Energy shortage and environmental pollution have become the public focusing issue. Straw biomass with its rich resources, non-polluting and renewable feature, has great application prospect in solving the energy crisis. Converting straw biomass to fermentable sugars by hydrolysis with cellulase and combing with fermentation may produce ethanol, hydrogen and other materials of energy, which has been a mature technology route. The crucial steps of utilizing straw biomass are the pretreatment of straw biomass and efficient obtaining of glycoside hydrolases. We summarize and analyze the current research from 3 aspects: the structural characteristics of straw and its biological pretreatment; the mechanism of cellulase in hydrolysis of straw biomass; and the gene engineering for cellulase. It has a guiding significance in the promotion of applying straw biomass for energy.

Key words: cellulose, cellulase, straw biomass, hydrolysis efficiency of cellulose, cellulase gene