Biodetoxification fungus selectively degrades toxic inhibitors generated from pretreatment of lignocellulose without consuming fermentable sugars.However,one barrier for practical application is the sustained cell via...Biodetoxification fungus selectively degrades toxic inhibitors generated from pretreatment of lignocellulose without consuming fermentable sugars.However,one barrier for practical application is the sustained cell viability in the consequent fermentation step to compete the fermentable sugars with fermenting strains,resulting in sugar loss and reduced target product yield.This study investigated the competitive growth property between the biodetoxification fungus Paecilomyces variotii FN89 and the L-lactic acid bacterium Pediococcus acidilactici ZY271 under varying temperature and lactic acid osmatic stress.The results show that the L-lactic acid bacterium Ped.acidilactici ZY271 showed less thermotolerance to Pae.variotii FN89 at high temperature of 45°C to 50°C in both synthetic medium and wheat straw hydrolysate.In the higher temperature environment,the growth of the biodetoxification strian failed to compete with the lactic acid fermentation strain and was quickly eliminated from the fermentation system.The high temperature fermentation facilitated a fast transition from the detoxification stage to the fermentation stage for higher production of L-lactic acid.展开更多
基金The National Key R&D Program of China(2023YFA0914400)the National Natural Science Foundation of China(32301269)+1 种基金China Postdoctoral Science Foundation(2023M741175)the Yangfan Project of Science and Technology Committee of Shanghai Municipality(23YF1409900).
文摘Biodetoxification fungus selectively degrades toxic inhibitors generated from pretreatment of lignocellulose without consuming fermentable sugars.However,one barrier for practical application is the sustained cell viability in the consequent fermentation step to compete the fermentable sugars with fermenting strains,resulting in sugar loss and reduced target product yield.This study investigated the competitive growth property between the biodetoxification fungus Paecilomyces variotii FN89 and the L-lactic acid bacterium Pediococcus acidilactici ZY271 under varying temperature and lactic acid osmatic stress.The results show that the L-lactic acid bacterium Ped.acidilactici ZY271 showed less thermotolerance to Pae.variotii FN89 at high temperature of 45°C to 50°C in both synthetic medium and wheat straw hydrolysate.In the higher temperature environment,the growth of the biodetoxification strian failed to compete with the lactic acid fermentation strain and was quickly eliminated from the fermentation system.The high temperature fermentation facilitated a fast transition from the detoxification stage to the fermentation stage for higher production of L-lactic acid.
