Microwave-assisted degradation of chitosan for a possible use in inhibiting crop pathogenic fungi

doi:10.1016/j.ijbiomac.2012.07.021

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	Microwave-assisted degradation of chitosan for a possible use in inhibiting crop pathogenic fungi
	Li, Kecheng 1,2; Xing, Ronge1 ; Liu, Song 1; Qin, Yukun 1,2; Meng, Xiangtao 1,2; Li, Pengcheng1 ; Liu, S (reprint author), Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China.
	2012-12-01
发表期刊	INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
ISSN	0141-8130
卷号	51 期号:5 页码:767-773
文章类型	Article
摘要	Degradation of chitosan by H2O2 under microwave irradiation was investigated. The oxidative degradation of chitosan was highly accelerated by microwave irradiation under the condition of low temperature and low concentration of H2O2. The degraded chitosans with low molecular weight (M-w) were characterized by gel permeation chromatography, Fourier-transform infrared spectroscopy, ultraviolet-visible spectroscopy, X-ray diffraction and elemental analysis. The decrease of M-w led to transformation of crystal structure and increase of water solubility, whereas no significant chemical structure change in the backbone of chitosan was observed. Antifungal activities of chitosans with different M against crop pathogenic fungi Phomopsis asparagi, Fusarium oxysoporum f. sp. Vasinfectum and Stemphylium solani were investigated at the concentrations of 100, 200 and 400 mg/L. All degraded chitosans with low M-w exhibited enhanced antifungal activity compared with original chitosan and the chitosan of 41.2 kDa showed the highest activity. At 400 mg/L, the chitosan of 41.2 kDa inhibited growth of P. asparagi at 89.3%, stronger than polyoxin and triadimefon, the inhibitory effects of which were found to be 55.5% and 68.5%. All the results indicated that oxidative degradation under microwave irradiation was a promising technique for large-scale production of low M-w chitosan for use in crop protection. (C) 2012 Elsevier B.V. All rights reserved.
关键词	Chitosan Degradation Microwave Irradiation Hydrogen Peroxide Antifungal Activity
学科领域	Biochemistry & Molecular Biology
DOI	10.1016/j.ijbiomac.2012.07.021
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000311196100012
引用统计	被引频次：80[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/12233
专题	海洋生物技术研发中心
通讯作者	Liu, S (reprint author), Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China.
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Li, Kecheng,Xing, Ronge,Liu, Song,et al. Microwave-assisted degradation of chitosan for a possible use in inhibiting crop pathogenic fungi[J]. INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES,2012,51(5):767-773.
APA	Li, Kecheng.,Xing, Ronge.,Liu, Song.,Qin, Yukun.,Meng, Xiangtao.,...&Liu, S .(2012).Microwave-assisted degradation of chitosan for a possible use in inhibiting crop pathogenic fungi.INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES,51(5),767-773.
MLA	Li, Kecheng,et al."Microwave-assisted degradation of chitosan for a possible use in inhibiting crop pathogenic fungi".INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES 51.5(2012):767-773.

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