[1] Fan L, Shi W J, Hu W R, Hao X Y, Wang D M, Yuan H, Yan H Y. Molecular and biochemical evidence for phenylpropanoid synthesis and presence of wall-linked phenolics in cotton fibers. J Integr Plant Biol, 2009, 51: 626–637 [2] Gou J Y, Wang L J, Chen S P, Hu W L, Chen X Y. Gene expression and metabolite profiles of cotton fiber during cell elongation and secondary cell wall synthesis. Cell Res, 2007, 17: 422–434 [3] Han L B, Li Y B, Wang H Y, Wu X M, Li C L, Luo M, Wu S J, Kong Z S, Pei Y, Jiao G L, Xia G X. The dual functions of WLIM1a in cell elongation and secondary wall formation in developing cotton fibers. Plant Cell, 2013, 25: 4421–4438 [4] Shi Y H, Zhu S W, Mao X Z, Feng J X, Qin Y M, Zhang L, Cheng J, Wei L P, Wang Z Y, Zhu Y X. Transcriptome profiling, molecular biological, and physiological studies reveal a major role for ethylene in cotton fiber cell elongation. Plant Cell, 2006, 18: 651–664 [5] K?rk?nen A, Koutaniemi S. Lignin biosynthesis studies in plant tissue cultures. J Integr Plant Biol, 2010, 52:176–185 [6] Rubin E M. Genomics of cellulosic biofuels. Nature, 2008, 454: 841–845 [7] Boerjan W, Ralph J, Baucher M. Lignin biosynthesis. Annu Rev Plant Biol, 2003, 54: 519–546 [8] Mousavioun P, Doherty W. Chemical and thermal properties of fractionated bagasse soda lignin. Ind Crops Prod, 2010, 31: 52–58 [9] 崔朋, 方红霞, 吴强林, 钱晨. 超高效聚合物色谱法测定酚化解聚木质素的相对分子质量. 色谱, 2015, 33: 314–317 Cui P, Fang H X, Wu Q L, Qian C. Relative molecular mass determination of phenolated depolymerized sodium lignosulfonate by advanced polymer chromatography system. Chin J Chromatogr, 2015, 33: 314–317 (in Chinese with English abstract) [10] Jeong H, Park J, Kim S, Lee J, Ahn N, Roh H G. Preparation and characterization of thermoplastic polyurethanes using partially acetylated kraft lignin. Fibers Polymers, 2013, 14: 1082–1093 [11] Pouteau C, Dole P, Cathala B, Averous L, Boquillon N. Antioxidant properties of lignin in polypropylene. Polymer Degrad Stab, 2003, 81: 9–18 [12]Tolbert A, Akinosho H, Khunsupat R, Naskar A K, Ragauskas A J. Characterization and analysis of the molecular weight of lignin for biorefining studies. Biofuels, Bioprod Bioref, 2014, 8: 836–856 [13] 韩敏. 不同提取方法对木质素分子量及其分布的影响. 洛阳理工学院学报(自然科学版), 2013, 23: 1–4 Han M. Effects of different extraction on lignin molecular mass and distribution. J Luoyang Inst Sci Technol (Nat Sci Edn), 2013, 23(2): 1–4 (in Chinese with English abstract) [14] 孙永昌. 木质素高效分离、结构表征及基于离子液体的降解机理研究. 北京林业大学博士学位论文, 北京, 2014. pp 125–135 Sun Y C. Efficient Separation and Structural Characterization of Lignin, and Lignin Degradation in Ionic Liquid-Based Systems. PhD Dissertation of Beijing Forestry University, Beijing, China, 2014. pp 125–135 (in Chinese with English abstract). [15] Hu W R, Fan L, Tian X L, Tian X L. Modified methods for the analysis of the lignin-like phenolic polymer contents of cotton fiber. J Anim Plant Sci, 2015, 25: 232-239 [16] 胡文冉, 范玲, 孙涛, 谢丽霞, 田晓莉. 棉花纤维中苯丙烷类结构单体的检测方法. 棉花学报, 2016, 28: 407–412 Hu W R, Fan L, Sun T, Xie L X, Tian X L. A method for detecting phenylpropanoid monomers in cotton fiber. Cotton Sci, 2016, 28: 407–412 (in Chinese with English abstract) [17] 胡文冉, 范玲, 谢丽霞, 王乐乐. 不同发育阶段棉纤维中木质素的沉积变化. 新疆农业科学, 2016, 53: 467–472 Hu W R, Fan L, Xie L X, Wang L L . Dynamic changes of lignin deposition during cotton fiber development stage. Xinjiang Agric Sci, 2016, 45: 467–472 (in Chinese with English abstract) [18] Müse G, Schindler T, Bergfeld R, Ruel K, Jacquet G, Lapierre C, Speth V, Schopfer P. Structure and distribution of lignin in primary and secondary cell walls of maize coleoptiles analyzed by chemical and immunological probes. Planta, 1997, 201: 146–159 [19] Koda K, Gaspar A, Argyropoulos D S. Molecular weight-functional group relations in softwood residual kraft lignins. Holzforschung, 2005, 59: 612–619 [20] Wu S B, Argyropoulos D S. An improved method for isolating lignin in high yield and purity. Journal of Pulp and Paper Science, 2003, 29: 235-240 [21] 蒋挺大. 木质素(第2版). 北京: 化学工业出版社, 2008 Jiang T D. Lignin, 2nd edn. Beijing: Chemical Industrial Press, 2008 (in Chinese) [22] 胡文冉, 张芳, 白洁, 曹双瑜, 范玲. 有机溶剂法提取棉花纤维中木质素. 新疆农业科学, 2011, 48: 1701–1703 Hu R W, Zhang F, Bai J, Cao S Y, Fan L. Extraction of lignin from cotton fiber with organic solvents. Xinjiang Agric Sci, 2011, 48: 1701–1703 (in Chinese with English abstract) [23] Ikeda T, Holtman K, Kadla J F, Chang H M, Jameel H. Studies on the effect of ball milling on lignin structure using a modified DFRC methods. J Agric Food Chem, 2002, 50: 129–135 [24] 刘凤岐, 汤心颐. 高分子物理. 北京: 高等教育出版社, 1995. pp 15–18 Liu F Q, Tang X Y. Polymer physics. Beijing: High Education Press, 1995. pp 15–18 (in Chinese) [25] 中野準三. 木质素的化学: 基础与应用. 北京: 轻工业出版社, 1988. pp 320–334 Nakano J. Chemistry of Lignin-Basis and Application. Beijing: China Light Industry Press, 1988. pp 320–334 (in Chinese) [26] Bj?rkman A. Studies on finely divided wood I. Extraction of lignin with neutral solvents. Svensk Papperstidning, 1956, 59: 477–485 [27] Brownell H H. Isolation of milled lignin and lignin carbohydrate complex. TAPPI, 1965, 48: 513–518 [28] Guerra A, Filpponen I, Lucia L A, Argyropoulos. Comparative evaluation of three lignin isolation protocols for various wood species. Agric Food Chem, 2006, 54: 9696–9705 [29] 武书斌, 李梦实. 麦草酶解-温和酸解木质素的化学结构特性研究. 林产化学与工业, 2006, 26(1): 104–108 Wu S B, Li M S. Study on chemical structure characteristics of wheat straw lignin from enzymatic hydrolysis-mild acidolysis. Chem Ind For Prod, 2006, 26: 104–108 (in Chinese with English abstract)