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<p>Species in the genus <i>Rugonectria</i> have been reported as plant pathogens causing canker diseases and have been found on the bark of dead woody plants. A survey conducted in 2023 revealed new disease symptoms characterized by cankers with orange to reddish perithecia on branches and trunks of jackfruit trees (<i>Artocarpus heterophyllus</i> Lam.) cultivated in the Central Highlands and Southern Vietnam. Morphological characteristics and a four-locus DNA sequence analysis of the nuclear ribosomal internal transcribed spacer (ITS) region, partial sequences of the translation elongation factor 1-alpha (<i>TEF1</i>), beta-tubulin (<i>TUB</i>), and RNA polymerase largest subunit (<i>RPB1</i>) genes revealed that the fungus isolated from necrotic wood represents a new species, described here as <i>Rugonectria artocarpicola</i> sp. nov. A pathogenicity test confirmed that this species is pathogenic to <i>A. heterophyllus</i>.</p>

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A new species, Rugonectria artocarpicola sp. nov., causing canker disease of jackfruit in Vietnam

  • 期刊论文

  • 发表日期：

    2025年12月5日

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  • Tran Ngoc Khanh,
  • Do Xuan Dat,
  • Vu Thi Phuong Binh,
  • Ha Minh Thanh,
  • Lai Tien Dung,
  • Le Dinh Thao

摘要

Species in the genus Rugonectria have been reported as plant pathogens causing canker diseases and have been found on the bark of dead woody plants. A survey conducted in 2023 revealed new disease symptoms characterized by cankers with orange to reddish perithecia on branches and trunks of jackfruit trees (Artocarpus heterophyllus Lam.) cultivated in the Central Highlands and Southern Vietnam. Morphological characteristics and a four-locus DNA sequence analysis of the nuclear ribosomal internal transcribed spacer (ITS) region, partial sequences of the translation elongation factor 1-alpha (TEF1), beta-tubulin (TUB), and RNA polymerase largest subunit (RPB1) genes revealed that the fungus isolated from necrotic wood represents a new species, described here as Rugonectria artocarpicola sp. nov. A pathogenicity test confirmed that this species is pathogenic to A. heterophyllus.