壳聚糖-La(Ⅲ)配合物的合成及对芦笋茎枯病菌抑菌活性研究

摘要

Water-soluble complex of chitosan-La(Ⅲ)was synthesized and characterized by FT-IR and UV-Vis spectra. The antifugal activities of chitosan and chitosan-La(Ⅲ) complex against Phomopsis asparagus were investigated. Results showed that chitosan-La (Ⅲ)had the higher antifungal activity than water-soluble chitosan,and at the low level of concentation of 1. 00 mg · Ml-1 和 1. 25 mg · Ml-1,its activity was increased 87. 68% and 88. 23% respectively.%合成了水溶性壳聚糖和稀土离子La(Ⅲ)的配合物,利用FT-IR和UV-Vis对配合物进行了表征,研究了壳聚糖及其配合物对芦笋茎枯病菌Phomopsis asparagus的抑制活性.结果表明壳聚糖La(Ⅲ)配合物对Phomopsis asparagus的抑菌活性较单一的水溶性壳聚糖显著提高.在低浓度1.00 mg·mL-1和1.25 mg·mL-1条件下,其抑菌活性分别提高87.68％和88.23％.