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Stable Isotopic Evidence for the Widespread Presence of Oxygen Containing Chemical Linkages between alpha-Cellulose and Lignin in Poaceae (Gramineae) Grass Leaves

文献类型： 外文期刊

作者： Zhou, Youping 1 ; Yin, Xijie 2 ; Yang, Hubiao 4 ; Su, Jing 2 ; Yu, Huimin 1 ; Wang, Yan 3 ; Zhou, Shuixiu 5 ; Zavadlav, S 1 ;

作者机构： 1.Shaanxi Univ Sci & Technol, Sch Chem & Chem Engn, Longshuo Rd, Xian 710021, Peoples R China

2.State Ocean Adm, Inst Oceanog 3, Lab Ocean & Coastal Geol, 178 Daxue Rd, Xiamen 361005, Peoples R China

3.Chinese Acad Sci, Yantai Inst Coastal Zone Res, CAS Key Lab Coastal Environm Proc & Ecol Remediat, 17 Chunhui Rd, Yantai 264003, Peoples R China

4.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Trop Pasture Res Ctr, Baodao Xincun 571737, Danzhou, Peoples R China

5.Xiamen Univ, Univ Hosp, Dept Internal Med, 172 Daxue Rd, Xiamen 361005, Peoples R China

6.Slovenian Forestry Inst,

关键词： Plant cell wall;Chemical linkage;alpha-Cellulose;Lignin;Stable oxygen isotopes

期刊名称：ACS SUSTAINABLE CHEMISTRY & ENGINEERING （ 影响因子：8.198； 五年影响因子：8.471 ）

ISSN： 2168-0485

年卷期： 2017 年 5 卷 4 期

页码：

收录情况： SCI

摘要： The chemical linkage between alpha-cellulose and lignin in plant cell walls has long been a controversial topic and crucial to devising effective strategies for sustainable biomass and bioenergy utilization. In this new contribution, we surveyed 80 Poaceae (Gramineae) species grown in tropical Hainan Island (China) to test the hypothesis that the presence of oxygen-containing chemical linkage in Poaceae species is widespread. Our innovative natural abundance oxygen isotopic analysis allowed us to infer that more than 1/3 of the species investigated has chemical (ether) linkages between alpha-cellulose and lignin in their leaf cell walls, with a species-specific 2-89 oxygen-containing bonds for every 1000 glucose units. However, the presence of such linkage appears to be phylogeny-dependent. On average, species of C-3 photosynthetic mode are found to have more extensive oxygen-containing linkages than those of C-4 photosynthetic mode. Our finding challenges the conventional view that no chemical bonds between alpha-cellulose and lignin are present in higher plant cell walls and calls for new strategies for further understanding of the chemical linkage between the two major constituents of cell walls. This is especially important in the context of renewed and growing interests in biomass, bioenergy, and plant cell wall structure studies.

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