Diverse Banana Pseudostems and Rachis Are Distinctive for Edible Carbohydrates and Lignocellulose Saccharification towards High Bioethanol Production under Chemical and Liquid Hot Water Pretreatments
文献类型： 外文期刊
作者： Li, Jingyang 1 ; Liu, Fei 1 ; Yu, Hua 1 ; Li, Yuqi 2 ; Zhou, Shiguang 1 ; Ai, Yuanhang 1 ; Zhou, Xinyu 1 ; Wang, Youmei 1 ;
作者机构： 1.Huazhong Agr Univ, Coll Plant Sci & Technol, Biomass & Bioenergy Res Ctr, Wuhan 430070, Peoples R China
2.Hubei Univ Arts & Sci, Coll Food Sci & Chem Engn, Lab Biomass Engn & Nanomat Applicat Automobiles, Xiangyang 441053, Peoples R China
3.Chinese Acad Trop Agr Sci, Haikou Expt Stn, Haikou 570102, Hainan, Peoples R China
4.Guangxi Univ, Coll Agr, State Key Lab Conservat & Utilizat Subtrop Agrobi, Nanning 530000, Peoples R China
关键词： banana; pseudostem; rachis; biomass pretreatments; enzymatic saccharification; bioethanol fermentation; cellulose crystallinity
期刊名称：MOLECULES （ 影响因子：4.412； 五年影响因子：4.588 ）
ISSN：
年卷期： 2021 年 26 卷 13 期
页码：
收录情况： SCI
摘要： Banana is a major fruit crop throughout the world with abundant lignocellulose in the pseudostem and rachis residues for biofuel production. In this study, we collected a total of 11 pseudostems and rachis samples that were originally derived from different genetic types and ecological locations of banana crops and then examined largely varied edible carbohydrates (soluble sugars, starch) and lignocellulose compositions. By performing chemical (H2SO4, NaOH) and liquid hot water (LHW) pretreatments, we also found a remarkable variation in biomass enzymatic saccharification and bioethanol production among all banana samples examined. Consequently, this study identified a desirable banana (Refen1, subgroup Pisang Awak) crop containing large amounts of edible carbohydrates and completely digestible lignocellulose, which could be combined to achieve the highest bioethanol yields of 31-38% (% dry matter), compared with previously reported ones in other bioenergy crops. Chemical analysis further indicated that the cellulose CrI and lignin G-monomer should be two major recalcitrant factors affecting biomass enzymatic saccharification in banana pseudostems and rachis. Therefore, this study not only examined rich edible carbohydrates for food in the banana pseudostems but also detected digestible lignocellulose for bioethanol production in rachis tissue, providing a strategy applicable for genetic breeding and biomass processing in banana crops.
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