食品科学 ›› 2018, Vol. 39 ›› Issue (20): 112-118.doi: 10.7506/spkx1002-6630-201820017

• 生物工程 • 上一篇    下一篇

华莱士瓜采后丝状真菌的分离及rDNA ITS区序列分析

王郅媛1,2,姚婷1,范雅为1,张燕1,王友升1,*   

  1. (1.北京食品营养与人类健康高精尖创新中心,北京工商大学,北京 100048;2.北京科学仪器装备协作服务中心,北京 100035)
  • 出版日期:2018-10-25 发布日期:2018-10-24
  • 基金资助:
    国家自然科学基金面上项目(31471626)

Morphological Characterization and rDNA ITS Sequence Analysis of Filamentous Fungi Isolated from Wallace Melon

WANG Zhiyuan1,2, YAO Ting1, FAN Yawei1, ZHANG Yan1, WANG Yousheng1,*   

  1. (1. Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University (BTBU), Beijing 100048, China; 2. Beijing Scientific Instruments and Equipment Cooperation Service Center, Beijing 100035, China)
  • Online:2018-10-25 Published:2018-10-24

摘要: 从采后贮藏期间自然发病的华莱士瓜上分离到12 株丝状真菌,将分离菌经纯化后回接到健康无损的华莱士瓜上,发病特征与分离发病果实一致,确定其为华莱士瓜的病原菌。结合形态学观察和rDNA内转录间隔区(internal transcribed spacer,ITS)序列分析,结果表明:分离到1 株黑附球菌(Epicoccum nigrum)、1?株草酸青霉菌(Penicillium oxalicum)、2 株链格孢属(Alternaria Nees ex Wallr.)真菌、3 株曲霉属(Aspergillus Micheli ex Fr.)真菌和5 株镰刀属(Fusarium LK. ex Fr.)真菌。其中,黑附球菌(E. nigrum)为甜瓜中首次发现的病原菌,而草酸青霉菌(P. oxalicum)、细极链格孢菌(Alternaria tenuissima)、泡盛曲霉菌(Aspergillus awamori)、木贼镰刀菌(Fusarium equiseti)、轮状镰刀菌(F. verticillioides)和燕麦镰刀菌(F. avenaceum)分别为甜瓜上分离到的青霉属、链格孢属、曲霉属和镰刀属的新菌株。

关键词: 华莱士瓜, 病原真菌, 形态学, ITS区序列

Abstract: In this study, twelve strains of filamentous fungi were isolated from the infected Wallace melon. All the purified isolates caused the same disease symptoms when re-inoculated to healthy Wallace melon. The results of morphological characterization and rDNA internal transcribed spacer (ITS) sequence analysis showed that one strain of Epicoccum nigrum, one strain of Penicillium oxalicum, two strains of Alternaria Nees ex Wallr., three strains of Aspergillus Micheli ex Fr., and five strains of Fusarium LK. ex Fr. were isolated. E. nigrum was isolated for the first time from Wallace melon. In addition, new pathogens of Penicillium, Alternaria, Aspergillus, and Fusarium including P. oxalicum, Alternaria tenuissima, Aspergillus awamori, F. equiseti, F. verticillioides and F. avenaceum were also isolated.

Key words: Wallace melon, filamentous fungi, morphological characterization, rDNA ITS sequence analysis

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