title: Sugar-rich sweet sorghum is distinctively affected by wall polymer features for biomass digestibility and ethanol fermentation in bagasse.
abstract: Sweet sorghum has been regarded as a typical species for rich soluble-sugar and high lignocellulose residues, but their effects on biomass digestibility remain unclear. In this study, we examined total 63 representative sweet sorghum accessions that displayed a varied sugar level at stalk and diverse cell wall composition at bagasse. Correlative analysis showed that both soluble-sugar and dry-bagasse could not significantly affect lignocellulose saccharification under chemical pretreatments. Comparative analyses of five typical pairs of samples indicated that DP of crystalline cellulose and arabinose substitution degree of non-KOH-extractable hemicelluloses distinctively affected lignocellulose crystallinity for high biomass digestibility. By comparison, lignin could not alter lignocellulose crystallinity, but the KOH-extractable G-monomer predominately determined lignin negative impacts on biomass digestions, and the G-levels released from pretreatments significantly inhibited yeast fermentation. The results also suggested potential genetic approaches for enhancing soluble-sugar level and lignocellulose digestibility and reducing ethanol conversion inhibition in sweet sorghum.
authors: National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors: Meng
authors: M
authors: Li
authors: National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors: Shengqiu
authors: S
authors: Feng
authors: National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors: Leiming
authors: L
authors: Wu
authors: National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors: Ying
authors: Y
authors: Li
authors: National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors: Chunfen
authors: C
authors: Fan
authors: National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors: Rui
authors: R
authors: Zhang
authors: National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors: Weihua
authors: W
authors: Zou
authors: National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
authors: Yuanyuan
authors: Y
authors: Tu
authors: Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
authors: Hai-Chun
authors: HC
authors: Jing
authors: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China.
authors: Shizhong
authors: S
authors: Li
authors: National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China. Electronic address: lpeng@mail.hzau.edu.cn.
authors: Liangcai
authors: L
authors: Peng
mesh_terms: D056804:Biofuels / Q000382:microbiology; D018533:Biomass; D001704:Biopolymers / Q000494:pharmacology*; D050260:Carbohydrate Metabolism / Q000187:drug effects; D002241:Carbohydrates / Q000032:analysis*; D002473:Cell Wall / Q000737:chemistry*; D002480:Cellulase / Q000378:metabolism; D002482:Cellulose / Q000494:pharmacology*; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation / Q000187:drug effects*; D008031:Lignin / Q000378:metabolism; D012441:Saccharomyces cerevisiae / Q000187:drug effects / Q000378:metabolism; D012995:Solubility; D045868:Sorghum / Q000187:drug effects*
chemical_list: D056804:Biofuels; D001704:Biopolymers; D002241:Carbohydrates; D000431:Ethanol; D002482:Cellulose; D008031:Lignin; C027433:bagasse; D002480:Cellulase
keywords: Biomass digestibility; Dry bagasse; Plant cell walls; Soluble sugar; Sweet sorghum