Field and saccharification performances of poplars severely downregulated in CAD1.

Autor: De Meester B; Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 71, 9052, Ghent, Belgium.; VIB Center for Plant Systems Biology, Technologiepark 71, 9052, Ghent, Belgium., Van Acker R; Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 71, 9052, Ghent, Belgium.; VIB Center for Plant Systems Biology, Technologiepark 71, 9052, Ghent, Belgium., Wouters M; Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 71, 9052, Ghent, Belgium.; VIB Center for Plant Systems Biology, Technologiepark 71, 9052, Ghent, Belgium., Traversari S; BioLabs, Institute of Life Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà 33, 56127, Pisa, Italy.; Research Institute on Terrestrial Ecosytems (IRET-CNR), Via Moruzzi 1, 56124, Pisa, Italy., Steenackers M; Research Institute for Nature and Forest (INBO), Gaverstraat 4, 9500, Geraardsbergen, Belgium., Neukermans J; Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 71, 9052, Ghent, Belgium.; VIB Center for Plant Systems Biology, Technologiepark 71, 9052, Ghent, Belgium., Van Breusegem F; Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 71, 9052, Ghent, Belgium.; VIB Center for Plant Systems Biology, Technologiepark 71, 9052, Ghent, Belgium., Déjardin A; INRAE, ONF, BioForA Orléans, 2163 Avenue de la pomme de pin, 45075, Ardon, France., Pilate G; INRAE, ONF, BioForA Orléans, 2163 Avenue de la pomme de pin, 45075, Ardon, France., Boerjan W; Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 71, 9052, Ghent, Belgium.; VIB Center for Plant Systems Biology, Technologiepark 71, 9052, Ghent, Belgium.
Jazyk: angličtina
Zdroj: The New phytologist [New Phytol] 2022 Dec; Vol. 236 (6), pp. 2075-2090. Date of Electronic Publication: 2022 Aug 09.
DOI: 10.1111/nph.18366
Abstrakt: Lignin is one of the main factors causing lignocellulosic biomass recalcitrance to enzymatic hydrolysis. Glasshouse-grown poplars severely downregulated for CINNAMYL ALCOHOL DEHYDROGENASE 1 (CAD1), the enzyme catalysing the last step in the monolignol-specific branch of lignin biosynthesis, have increased saccharification yields and normal growth. Here, we assess the performance of these hpCAD poplars in the field under short rotation coppice culture for two consecutive rotations of 1 yr and 3 yr. While 1-yr-old hpCAD wood had 10% less lignin, 3-yr-old hpCAD wood had wild-type lignin levels. Because of their altered cell wall composition, including elevated levels of cinnamaldehydes, both 1-yr-old and 3-yr-old hpCAD wood showed enhanced saccharification yields upon harsh alkaline pretreatments (up to +85% and +77%, respectively). In contrast with previous field trials with poplars less severely downregulated for CINNAMYL ALCOHOL DEHYDROGENASE (CAD), the hpCAD poplars displayed leaning phenotypes, early bud set, early flowering and yield penalties. Moreover, hpCAD wood had enlarged vessels, decreased wood density and reduced relative and free water contents. Our data show that the phenotypes of CAD-deficient poplars are strongly dependent on the environment and underpin the importance of field trials in translating basic research towards applications.
(© 2022 The Authors. New Phytologist © 2022 New Phytologist Foundation.)
Databáze: MEDLINE
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