title: Ammonium oxalate-extractable uronic acids positively affect biomass enzymatic digestibility by reducing lignocellulose crystallinity in Miscanthus.
abstract: Based on systems biology analyses of total 179 representative Miscanthus accessions, ammonium oxalate (AO)-extractable uronic acids could either positively affect biomass digestibility or negatively alter lignocellulose crystallinity at p<0.01 or 0.05. Comparative analysis of four typical pairs of Miscanthus samples indicated that the AO-extractable uronic acids, other than hexoses and pentoses, play a predominant role in biomass enzymatic saccharification upon various chemical pretreatments, consistent with observations of strong cell tissue destruction in situ and rough biomass residue surface in vitro in the unique Msa24 sample rich in uronic acids. Notably, AO-extraction of uronic acids could significantly increase lignocellulose CrI at p<0.05, indicating that uronic acids-rich polymers may have the interactions with β-1,4-glucan chains that reduce cellulose crystallinity. It has also suggested that increasing of uronic acids should be a useful approach for enhancing biomass enzymatic digestibility in Miscanthus and beyond.
authors.affiliation: Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Yanting
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Jiangfeng
authors.initials: J
authors.lastname: Huang
authors.affiliation: Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Li
authors.affiliation: Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Ke
authors.initials: K
authors.lastname: Xiong
authors.affiliation: Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Youmei
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Fengcheng
authors.initials: F
authors.lastname: Li
authors.affiliation: Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Mingyong
authors.initials: M
authors.lastname: Liu
authors.affiliation: Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Zhiliang
authors.initials: Z
authors.lastname: Wu
authors.affiliation: Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Tu
authors.affiliation: Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China. Electronic address: lpeng@mail.hzau.edu.cn.
authors.forename: Liangcai
authors.initials: L
authors.lastname: Peng
mesh_terms: D056804:Biofuels; D018533:Biomass; D002473:Cell Wall / Q000737:chemistry; D002482:Cellulose / Q000378:metabolism; D005936:Glucans / Q000737:chemistry; D008031:Lignin / Q000737:chemistry* / Q000378:metabolism; D019815:Oxalic Acid / Q000737:chemistry*; D006109:Poaceae / Q000737:chemistry*; D049490:Systems Biology / Q000379:methods; D014574:Uronic Acids / Q000737:chemistry* / Q000302:isolation & purification / Q000378:metabolism
chemical_list: D056804:Biofuels; D005936:Glucans; D014574:Uronic Acids; C036909:lignocellulose; D002482:Cellulose; D008031:Lignin; C040088:1,4-glucan; D019815:Oxalic Acid
keywords: Biomass digestibility; Lignocellulose crystallinity; Miscanthus; Pectin; Uronic acids