Morphological, molecular and biological characterization of Esteya vermicola, a nematophagous fungus isolated from intercepted wood packing materials exported from Brazil

作者：Wang, Xuan; Wang, Tingting; Wang, Jincheng; Guan, Tinglong; Li, Hongmei^*

来源：Mycoscience, 2014, 55(5): 367-377.

DOI：10.1016/j.myc.2014.01.002

• Bursaphelenchus
• Exotic interception
• Germination mode
• Infection
• ISPM

The nematophagous fungus Esteya vermicola, strain NKF 13222, was purified from an isolate of Bursaphelenchus rainulfi which was intercepted from wood packaging materials originating in Brazil and arriving at Tianjin port in China. The fungus produced two types of conidiogenous cells and conidia, each with different germination modes. More lunate adhesive conidia than bacilloid conidia were produced on nutrient-poor water agar medium. Morphological comparisons revealed the NKF 13222 strain closely resembled the Taiwan strain E. vermicola (ATCC 74485) previously isolated from the pinewood nematode B. xylophilus. Phylogenetic analysis of the p-tubulin and elongation factor 1-alpha genes indicated that the NKF 13222 grouped with other strains of E. vermicola including the Taiwan strain. This was the first record of E. vermicola from B. rainulfi in South America. Infection tests demonstrated that NKF 13222 was more infective to aphelenchid than tylenchid nematodes and that only lunate adhesive conidia were infectious. The results suggest that the fungus might be a pathogen of plant parasitic nematodes with a broad distribution and provide new information for the potential biocontrol of plant diseases caused by B. xylophilus, Aphelenchoides spp. and Ditylenchus destructor.

• 出版日期2014-9
• 单位南京农业大学