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| Fiber Morphology, Lignin Structure and Lignin Distribution in Cell Wall of the Pennisetumsinese |
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| DOI：10.11980/j.issn.0254-508X.2017.03.003 |
| Key Words:Pennisetumsinese lignin structure 31P-NMR 2D-HSQC NMR |
| Fund Project:国家自然科学基金（31370580, 31470602）；山东省重大科技专项（2015ZDZX09002）；泰山学者工程专项经费。 |
| Author Name | Affiliation | | 沈 锋1 | 1.齐鲁工业大学制浆造纸科学与技术教育部重点实验室,山东济南,250353 | | 陈嘉川1 | 1.齐鲁工业大学制浆造纸科学与技术教育部重点实验室,山东济南,250353 | | 杨桂花1,* | 1.齐鲁工业大学制浆造纸科学与技术教育部重点实验室,山东济南,250353 | | 王 强1 | 1.齐鲁工业大学制浆造纸科学与技术教育部重点实验室,山东济南,250353 | | 刘姗姗1 | 1.齐鲁工业大学制浆造纸科学与技术教育部重点实验室,山东济南,250353 | | 胡长青2 | 2.山东晨鸣纸业集团股份有限公司,山东寿光,262700 |
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| Abstract:The morphologiy of fibers, chemical components, lignin structure and the lignin distribution in cell wall of Pennisetumsinese were analyzed. Fiber Quality Analyzer (FQA) analysis showed that average fiber length was 0.96mm and the width was 23.1 μm, fiber length-width ratio reached to 41.1. Alkaline nitrobenzene oxidation quantitative analysis revealed that Pennisetumsinese lignin was typical GSH-type. It was found that the highest content of hydroxyl groups was aliphatic OH (3.96 mmol/g), and non-condensed phenolic hydroxyl accounted for a large proportion content of the total phenolic hydroxyl (96.3%). In addition, 2D-HSQC NMR analysis indicated that the alkyl aryl ether linkages was predominant (β-O-4′, 84.4% of total linkages), followed by resinols (β-β′, 9.9%) and phenylcomumarans (β-5′5.7%). Moreover, aromatic regions showed large quantity of S-type and G-type lignin, and the S/G ratio was 1.25. Confocal Raman microscopy (CRM) indicated that the concentrations of lignin and hydroxycinnamic acid (HCA) in the cell walls followed the decreasing order, as CC＞CML＞SW, but the concentration of HCA waslowerthan that of lignin. |
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