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Article

Diverse Banana Pseudostems and Rachis Are Distinctive for Edible Carbohydrates and Lignocellulose Saccharification towards High Bioethanol Production under Chemical and Liquid Hot Water Pretreatments

1
Biomass & Bioenergy Research Centre, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China
2
Laboratory of Biomass Engineering & Nanomaterial Application in Automobiles, College of Food Science & Chemical Engineering, Hubei University of Arts and Science, Xiangyang 441053, China
3
Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Haikou 570102, China
4
State Key Laboratory for Conservation & Utilization of Subtropical Agro-Bioresources, College of Agriculture, Guangxi University, Nanning 530000, China
*
Author to whom correspondence should be addressed.
Molecules 2021, 26(13), 3870; https://doi.org/10.3390/molecules26133870
Submission received: 21 April 2021 / Revised: 31 May 2021 / Accepted: 15 June 2021 / Published: 24 June 2021

Abstract

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.
Keywords: banana; pseudostem; rachis; biomass pretreatments; enzymatic saccharification; bioethanol fermentation; cellulose crystallinity banana; pseudostem; rachis; biomass pretreatments; enzymatic saccharification; bioethanol fermentation; cellulose crystallinity

Share and Cite

MDPI and ACS Style

Li, J.; Liu, F.; Yu, H.; Li, Y.; Zhou, S.; Ai, Y.; Zhou, X.; Wang, Y.; Wang, L.; Peng, L.; et al. Diverse Banana Pseudostems and Rachis Are Distinctive for Edible Carbohydrates and Lignocellulose Saccharification towards High Bioethanol Production under Chemical and Liquid Hot Water Pretreatments. Molecules 2021, 26, 3870. https://doi.org/10.3390/molecules26133870

AMA Style

Li J, Liu F, Yu H, Li Y, Zhou S, Ai Y, Zhou X, Wang Y, Wang L, Peng L, et al. Diverse Banana Pseudostems and Rachis Are Distinctive for Edible Carbohydrates and Lignocellulose Saccharification towards High Bioethanol Production under Chemical and Liquid Hot Water Pretreatments. Molecules. 2021; 26(13):3870. https://doi.org/10.3390/molecules26133870

Chicago/Turabian Style

Li, Jingyang, Fei Liu, Hua Yu, Yuqi Li, Shiguang Zhou, Yuanhang Ai, Xinyu Zhou, Youmei Wang, Lingqiang Wang, Liangcai Peng, and et al. 2021. "Diverse Banana Pseudostems and Rachis Are Distinctive for Edible Carbohydrates and Lignocellulose Saccharification towards High Bioethanol Production under Chemical and Liquid Hot Water Pretreatments" Molecules 26, no. 13: 3870. https://doi.org/10.3390/molecules26133870

APA Style

Li, J., Liu, F., Yu, H., Li, Y., Zhou, S., Ai, Y., Zhou, X., Wang, Y., Wang, L., Peng, L., & Wang, Y. (2021). Diverse Banana Pseudostems and Rachis Are Distinctive for Edible Carbohydrates and Lignocellulose Saccharification towards High Bioethanol Production under Chemical and Liquid Hot Water Pretreatments. Molecules, 26(13), 3870. https://doi.org/10.3390/molecules26133870

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