Li Yan, Liu Song, Qin Yukun, Xing Ronge, Chen Xiaolin, Li Kecheng, Li Pengcheng
Institute of Oceanology, Chinese Academy of Sciences, No. 7 Nanhai Road, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100049, China; Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, No. 7 Nanhai Road, Qingdao 266071, China.
Institute of Oceanology, Chinese Academy of Sciences, No. 7 Nanhai Road, Qingdao 266071, China; Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, No. 7 Nanhai Road, Qingdao 266071, China.
Biomed Res Int. 2016;2016:8196960. doi: 10.1155/2016/8196960. Epub 2016 Jul 27.
In this study, three pyrimethanil grafted chitosan (PML-g-CS) derivatives were obtained. The structures of the conjugates were confirmed by FT-IR, (1)H NMR, and EA. The grafting ratios were measured by HPLC. Antifungal properties of pyrimethanil grafted chitosan (PML-g-CS) derivatives against the plant pathogenic fungi Rhizoctonia solani and Gibberella zeae were investigated at concentrations of 100, 200, and 400 mg/L. The PML-g-CS derivatives showed enhanced antifungal activity in comparison with chitosan. The PML-g-CS-1 showed the best antifungal activity against R. solani, whose antifungal index was 58.32%. The PML-g-CS-2 showed the best antifungal activity against G. zeae, whose antifungal index was 53.48%. The conjugation of chitosan and pyrimethanil showed synergistic effect. The PML-g-CS derivatives we developed showed potential for further study and application in crop protection.
在本研究中，制备了三种嘧霉胺接枝壳聚糖（PML-g-CS）衍生物。通过傅里叶变换红外光谱（FT-IR）、核磁共振氢谱（¹H NMR）和元素分析（EA）对共轭物的结构进行了确证。采用高效液相色谱（HPLC）测定接枝率。研究了嘧霉胺接枝壳聚糖（PML-g-CS）衍生物在100、200和400 mg/L浓度下对植物病原真菌立枯丝核菌和玉米赤霉的抑菌性能。与壳聚糖相比，PML-g-CS衍生物表现出增强的抑菌活性。PML-g-CS-1对立枯丝核菌表现出最佳的抑菌活性，其抑菌指数为58.32%。PML-g-CS-2对玉米赤霉表现出最佳的抑菌活性，其抑菌指数为53.48%。壳聚糖与嘧霉胺的共轭显示出协同效应。我们开发的PML-g-CS衍生物在作物保护方面具有进一步研究和应用的潜力。
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