Cell-wall composition and accessibility to hydrolytic enzymes is differentially altered in divergently bred switchgrass (Panicum virgatum L.) genotypes

Applied Biochemistry and Biotechnology
Gautam SarathKenneth P Vogel

Abstract

The aims of this study were to understand the genotypic variability in cell-wall composition and cell-wall accessibility to enzymes in select switchgrass plants obtained from two different populations derived from a base population of octaploid cultivars. Population C+3 was developed by three breeding generations for high digestibility and population C-1 developed by one generation of breeding for low digestibility. Above-ground biomass from 12 selected genotypes, three each with high or low digestibility within each population, was analyzed for their cell-wall aromatics and polysaccharides. The ratio of p-coumaric acid/ferulic acid was greater (P < or = 0.05) for the high-lignin C-1 population over the low-lignin C+3 population, although the amounts of these two phenolics did not differ between populations. Combined values of guaiacyl + syringyl-lignin were consistently higher in genotypes from the C-1 population as compared to the genotypes from the C+3 population. Overall, p-coumaric acid was released by enzymes in greater amounts than ferulic acid in all these genotypes. Genotypes in the C-1 population exhibited lower dry weight loss as compared to the genotypes in the C+3 population after enzymatic digestion, suggesting ch...Continue Reading

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Citations

Feb 10, 2012·Biotechnology for Biofuels·Scott J LeeSamuel P Hazen
Nov 19, 2008·Annual Review of Plant Biology·Andrew Carroll, Chris Somerville
Nov 8, 2012·Bioresource Technology·Jose A Perez-PimientaBlake A Simmons
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Aug 23, 2011·Bioresource Technology·Gautam SarathHan Chen
Feb 27, 2019·The Journal of Alternative and Complementary Medicine : Research on Paradigm, Practice, and Policy·Tobias SundbergTorkel Falkenberg
Jun 4, 2021·BMC Plant Biology·Ana López-MalvarRogelio Santiago
Apr 25, 2018·Journal of Agricultural and Food Chemistry·F El HageM Reymond

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