Accumulation and Structural Unit of Wall-linked Phenolics in the Cotton (Gossypium hirsutum) Fiber Secondary Wall. | [International Journal of Agriculture and Biology • 2019]

Author(s):

1. Wen-Ran Hu: Institute of Nuclear and Biological Technologies, Xinjiang Academy of Agricultural Sciences,Nanchang Road, Urumqi,China

2. Raphael Linker: Department of Environmental, Water and Agricultural Engineering, Faculty of Civil and Environmental Engineering, Technion-Israel Institute of Technology,Haifa 32000,Israel

3. Ling Fan: Institute of Nuclear and Biological Technologies, Xinjiang Academy of Agricultural Sciences,Nanchang Road, Urumqi,China

4. Xiao-Yun Zhou: Institute of Nuclear and Biological Technologies, Xinjiang Academy of Agricultural Sciences,Nanchang Road, Urumqi,China

5. Yang Yang: Institute of Nuclear and Biological Technologies, Xinjiang Academy of Agricultural Sciences,Nanchang Road, Urumqi,China

6. Bo Li: Institute of Nuclear and Biological Technologies, Xinjiang Academy of Agricultural Sciences,Nanchang Road, Urumqi,China

7. Xiao-Rong Li: Institute of Nuclear and Biological Technologies, Xinjiang Academy of Agricultural Sciences,Nanchang Road, Urumqi,China

8. Qin Weng: Institute of Agricultural Economics and Scientific Technical Information, Xinjiang Academy of Agricultural Sciences,403 Nanchang Road, Urumqi 830091,China

Abstract:

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 b-5 and b-b, and ether linkage of b-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 polydispersity coefficient was 1.09-1.74.

Page(s): 1063-1072

DOI: 10.17957/IJAB/15.0995

Published: Journal: International Journal of Agriculture and Biology, Volume: 21, Issue: 5, Year: 2019

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