Evaluation of Relationships between Growth Rate, Tree Size, Lignocellulose Composition, and Enzymatic Saccharification in Interspecific Corymbia Hybrids and Parental Taxa

Adam L Healey; David J Lee; Jason S Lupoi; Gabriella Papa; Joel M Guenther; Luca Corno; Fabrizio Adani; Seema Singh; Blake A Simmons; Robert J Henry

doi:10.3389/fpls.2016.01705

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Evaluation of Relationships between Growth Rate, Tree Size, Lignocellulose Composition, and Enzymatic Saccharification in Interspecific Corymbia Hybrids and Parental Taxa

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Evaluation of Relationships between Growth Rate, Tree Size, Lignocellulose Composition, and Enzymatic Saccharification in Interspecific Corymbia Hybrids and Parental Taxa

Adam L Healey, David J Lee, Jason S Lupoi, Gabriella Papa, Joel M Guenther, Luca Corno, Fabrizio Adani, Seema Singh, Blake A Simmons and Robert J Henry

Frontiers in Plant Science, Vol.7, 1705

2016

DOI: https://doi.org/10.3389/fpls.2016.01705

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Abstract

In order for a lignocellulosic bioenergy feedstock to be considered sustainable, it must possess a high rate of growth to supply biomass for conversion. Despite the desirability of a fast growth rate for industrial application, it is unclear what effect growth rate has on biomass composition or saccharification. We characterized Klason lignin, glucan, and xylan content with response to growth in Corymbia interspecific F1 hybrid families (HF) and parental species Corymbia torelliana and C. citriodora subspecies variegata and measured the effects on enzymatic hydrolysis from hydrothermally pretreated biomass. Analysis of biomass composition within Corymbia populations found similar amounts of Klason lignin content (19.7-21.3%) among parental and hybrid populations, whereas glucan content was clearly distinguished within C. citriodora subspecies variegata (52%) and HF148 (60%) as compared to other populations (28-38%). Multiple linear regression indicates that biomass composition is significantly impacted by tree size measured at the same age, with Klason lignin content increasing with diameter breast height (DBH) (+0.12% per cm DBH increase), and glucan and xylan typically decreasing per DBH cm increase (-0.7 and -0.3%, respectively). Polysaccharide content within C. citriodora subspecies variegata and HF-148 were not significantly affected by tree size. High-throughput enzymatic saccharification of hydrothermally pretreated biomass found significant differences among Corymbia populations for total glucose production from biomass, with parental Corymbia torelliana and hybrids HF-148 and HF-51 generating the highest amounts of glucose (~180 mg/g biomass, respectively), with HF-51 undergoing the most efficient glucan-to-glucose conversion (74%). Based on growth rate, biomass composition, and further optimization of enzymatic saccharification yield, high production Corymbia hybrid trees are potentially suitable for fast-rotation bioenergy or biomaterial production.

Details

Title: Evaluation of Relationships between Growth Rate, Tree Size, Lignocellulose Composition, and Enzymatic Saccharification in Interspecific Corymbia Hybrids and Parental Taxa
Authors: Adam L Healey (Author) - University of Queensland
David J Lee (Author) - University of the Sunshine Coast - Faculty of Arts, Business and Law
Jason S Lupoi (Author) - Prozess Technology, United States
Gabriella Papa (Author) - Lawrence Berkeley National Laboratory, United States
Joel M Guenther (Author) - Lawrence Berkeley National Laboratory, United States
Luca Corno (Author) - University of Milan, Italy
Fabrizio Adani (Author) - University of Milan, Italy
Seema Singh (Author) - Lawrence Berkeley National Laboratory, United States
Blake A Simmons (Author) - Lawrence Berkeley National Laboratory, United States
Robert J Henry (Author) - University of Queensland
Publication details: Frontiers in Plant Science, Vol.7, 1705; 14
Publisher: Frontiers Research Foundation
Date published: 2016
DOI: 10.3389/fpls.2016.01705
ISSN: 1664-462X
Copyright note: Copyright © 2016 Healey, Lee, Lupoi, Papa, Guenther, Corno, Adani, Singh, Simmons and Henry. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Organisation Unit: Tropical Forests and People Research Centre; University of the Sunshine Coast, Queensland; Forest Industries Research Centre; Forest Research Institute
Language: English
Record Identifier: 99450441702621
Output Type: Journal article

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