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Accumulation and Structural Unit of Wall-linked Phenolics in the Cotton (Gossypium hirsutum) Fiber Secondary Wall

文献类型： 外文期刊

作者： Hu, Wen-Ran 1 ; Linker, Raphael 2 ; Fan, Ling 1 ; Zhou, Xiao-Yun 1 ; Yang, Yang 1 ; Li, Bo 1 ; Li, Xiao-Rong 1 ; Weng, Qi 1 ;

作者机构： 1.Xinjiang Acad Agr Sci, Inst Nucl & Biol Technol, Nanchang Rd, Urumqi, Peoples R China

2.Technion Israel Inst Technol, Fac Civil & Environm Engn, Dept Environm Water & Agr Engn, IL-32000 Haifa, Israel

3.Xinjiang Acad Agr Sci, Inst Agr Econ & Sci Tech Informat, 403 Nanchang Rd, Urumqi 830091, Peoples R China

关键词： Biochemical composition; Cotton fiber; Guaiacyl unit; Phenolics; Secondary wall; Syringyl unit

期刊名称：INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY （ 影响因子：0.822； 五年影响因子：0.906 ）

ISSN： 1560-8530

年卷期： 2019 年 21 卷 5 期

页码：

收录情况： SCI

摘要： The development of secondary cell wall and final composition affects the quality of mature cotton fiber. The previous studies reported that the biosynthesis of phenolic compounds occur throughout the development of cotton fiber secondary wall. This study investigated the accumulation and structural unit of wall-linked phenolics in the cotton fiber secondary wall. The accumulation of phenolics in cotton fibers within a single boll increased along with the fiber development from 20 days postanthesis (DPA) to maturity. The method, which the wall-linked phenolics was observed thoroughly by fourier transform infrared spectroscopy (FTIR) after treated by thioglycolic acid (TGA), was established. The result showed that the cell wall phenolics of cotton fiber consisted predominantly of guaiacyl units (G) with some syringyl units (S). The results of derivatization followed by reductive cleavage (DFRC) confirmed G and some S units existed in the cell wall of cotton fiber. The nuclear magnetic resonance (NMR) showed connection ways between G and S were C-C bond of beta-5 and beta-beta, and ether linkage of beta-O-4. Gel permeation chromatography (GPC) indicated the average molecular weight (Mw) distribution range of wall-linked phenolics with 1023-2169 g mol(-1), while number-average molecular weight (Mn) was 900-1970 g mol(-1) and the polyclispersity coefficient was 1.09-1.74. (C) 2019 Friends Science Publishers

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