Analysis of growth of the pectinase gene cluster deletion mutant (JWCB010) on selected substrates. All substrates were provided at 0.5 g/L in LOD medium . Growth curves and histograms represent the average ± SD of at least three biological replicates. Substrate abbreviations: SG, switchgrass; Ara, Arabidopsis; PG, polygalacturonic acid. CFU stands for colony-forming unit. Comparison of growth of JWCB005 (?pyrFA) and JWCB010 (?pyrFA ?pecABCR) on (A) maltose, (B) cellobiose, (C) plant biomass, and (D) pectin compounds. (E) Differences in growth on various substrates. Strains were grown on the designated carbon source for 24 h at 75°C. For each comparison P < 0.012.