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Lookup NU author(s): Professor William WillatsORCiD
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© 2019 American Society of Plant Biologists. All rights reserved. Polyploidization has played a key role in plant breeding and crop improvement. Although its potential to increase biomass yield is well described, the effect of polyploidization on biomass composition has largely remained unexplored. Here, we generated a series of Arabidopsis (Arabidopsis thaliana) plants with different somatic ploidy levels (2n, 4n, 6n, and 8n) and performed rigorous phenotypic characterization. Kinematic analysis showed that polyploids developed slower compared to diploids; however, tetra-and hexaploids, but not octaploids, generated larger rosettes due to delayed flowering. In addition, morphometric analysis of leaves showed that polyploidy affected epidermal pavement cells, with increased cell size and reduced cell number per leaf blade with incrementing ploidy. However, the inflorescence stem dry weight was highest in tetraploids. Cell wall characterization revealed that the basic somatic ploidy level negatively correlated with lignin and cellulose content, and positively correlated with matrix polysaccharide content (i.e. hemicellulose and pectin) in the stem tissue. In addition, higher ploidy plants displayed altered sugar composition. Such effects were linked to the delayed development of polyploids. Moreover, the changes in polyploid cell wall composition promoted saccharification yield. The results of this study indicate that induction of polyploidy is a promising breeding strategy to further tailor crops for biomass production.
Author(s): Corneillie S, De Storme N, Van Acker R, Fangel JU, De Bruyne M, De Rycke R, Geelen D, Willats WGT, Vanholme B, Boerjan W
Publication type: Article
Publication status: Published
Journal: Plant Physiology
Year: 2019
Volume: 179
Issue: 1
Pages: 74-87
Print publication date: 01/01/2019
Online publication date: 09/10/2018
Acceptance date: 21/09/2018
ISSN (print): 0032-0889
ISSN (electronic): 1532-2548
Publisher: American Society of Plant Biologists
URL: https://doi.org/10.1104/pp.18.00967
DOI: 10.1104/pp.18.00967
PubMed id: 30301776
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