Variation of S/G ratio and lignin content in a Populus family influences the release of xylose by dilute acid hydrolysis
Variation of S/G ratio and lignin content in a Populus family influences the release of xylose by dilute acid hydrolysis
复制标题
DOI：
10.1385/abab:130:1:427
复制
发表时间：
2006-03-01
影响因子：
3
通讯作者：
Nghiem, Nhuan P.
中科院分区：
文献类型：
--
作者：
Davison, Brian H.;Drescher, Sadie R.;Nghiem, Nhuan P.
来自第二代杨树杂交的木材样品显示出具有不同的木质素含量和S/G比（S：类胡萝卜素结构; G：类愈创木基木质素结构）。木质素含量变化范围为22.7%至25.8%，S/G比变化范围为1.8至2.3。将跨越这些范围的选定样品用稀（1%）硫酸水解以释放可发酵糖。选择半纤维素级分的部分水解的条件以最大化样品之间变化的表达。结果表明，木质素含量和S/G比对木糖产率有显著影响。例如，25.8%木质素和2.3S/G（高木质素，高S/G）样品的木糖产率产生理论产率的30%，而22.7%木质素和1.8S/G（低木质素，低S/G）样品的木糖产率为理论值的55%。这些结果表明，木质素含量和组成之间的遗传变异的单一物种可以影响生物质的水解性。
Wood samples from a second generation Populus cross were shown to have different lignin contents and S/G ratios (S: syringyl-like lignin structures; G: guaiacyl-like lignin structures). The lignin contents varied from 22.7% to 25.8% and the S/G ratio from 1.8 to 2.3. Selected samples spanning these ranges were hydrolyzed with dilute (1%) sulfuric acid to release fermentable sugars. The conditions were chosen for partial hydrolysis of the hemicellulosic fraction to maximize the expression of variation among samples. The results indicated that both lignin contents and S/G ratio significantly affected the yield of xylose. For example, the xylose yield of the 25.8% lignin and 2.3 S/G ( high lignin, high S/G) sample produced 30% of the theoretical yield, whereas the xylose yield of the 22.7% lignin and 1.8 S/G ( low lignin, low S/G) was 55% of the theoretical value. These results indicate that lignin content and composition among genetic variants within a single species can influence the hydrolyzability of the biomass.