Scholarlink

<p>Morel mushrooms (<i>Morchella</i> sp. pl.) are high-value edible fungi, with cultivation expanding rapidly across China in recent years. Between 2023 and 2024, symptoms of white mold disease were observed on fruiting bodies of <i>Morchella sextelata</i> in commercial farms located in Jilin and Hebei Provinces, China. Affected mushrooms exhibited white cottony mycelial growth, followed by tissue softening, sporophore wilting, and, in some cases, collapse of the fruiting bodies. Disease incidence ranged from 10 to 20%, resulting in noticeable yield losses and reduced market quality. Two fungal isolates were consistently recovered from symptomatic tissues and cultured for further analysis. Morphological examination revealed colony features typical of <i>Trichoderma</i> species, including fast-growing, greenish-white mycelia with concentric rings and branched conidiophores. Multigene phylogenetic analysis based on the translation elongation factor 1-α (<i>tef1</i>) gene and the second largest subunit of RNA polymerase II (<i>rpb2</i>) confirmed the identity of the isolates as <i>Trichoderma afroharzianum</i> and <i>Trichoderma tomentosum</i>. Pathogenicity tests on healthy morel fruiting bodies reproduced the original symptoms, and the pathogens were successfully re-isolated, thereby fulfilling Koch’s postulates. These findings enhance understanding of white mold etiology in morels and support the development of targeted disease management practices.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

White mold of Morchella sextelata caused by Trichoderma afroharzianum and T. tomentosum in China

  • 期刊论文

  • 发表日期：

    2026年2月9日

查看全文
  • Keling Liu,
  • Xiao Huang,
  • Rujia Liang,
  • Yongwei Wang,
  • Muqing Bai,
  • Luzhen Wang,
  • Frederick Leo Sossah,
  • Chunlan Zhang

摘要

Morel mushrooms (Morchella sp. pl.) are high-value edible fungi, with cultivation expanding rapidly across China in recent years. Between 2023 and 2024, symptoms of white mold disease were observed on fruiting bodies of Morchella sextelata in commercial farms located in Jilin and Hebei Provinces, China. Affected mushrooms exhibited white cottony mycelial growth, followed by tissue softening, sporophore wilting, and, in some cases, collapse of the fruiting bodies. Disease incidence ranged from 10 to 20%, resulting in noticeable yield losses and reduced market quality. Two fungal isolates were consistently recovered from symptomatic tissues and cultured for further analysis. Morphological examination revealed colony features typical of Trichoderma species, including fast-growing, greenish-white mycelia with concentric rings and branched conidiophores. Multigene phylogenetic analysis based on the translation elongation factor 1-α (tef1) gene and the second largest subunit of RNA polymerase II (rpb2) confirmed the identity of the isolates as Trichoderma afroharzianum and Trichoderma tomentosum. Pathogenicity tests on healthy morel fruiting bodies reproduced the original symptoms, and the pathogens were successfully re-isolated, thereby fulfilling Koch’s postulates. These findings enhance understanding of white mold etiology in morels and support the development of targeted disease management practices.