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Caulicolous Botryosphaeriales from Thailand.

T Trakunyingcharoen1, L Lombard2, J Z Groenewald2

  • 1Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand;

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Summary
This summary is machine-generated.

This study identifies novel fungal species within the Botryosphaeriaceae family in Thailand, expanding our understanding of plant pathogens and endophytes. New records and species of Botryosphaeriales were discovered, contributing to plant disease research.

Keywords:
AplosporellaBotryosphaeriaceaeDiplodiaLasiodiplodiaPseudofusicoccummultigene phylogenysexual morphsystematic

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Area of Science:

  • Mycology
  • Plant Pathology
  • Phylogenetics

Background:

  • Botryosphaeriales, particularly the Botryosphaeriaceae family, are significant endophytes and pathogens affecting numerous woody plants globally.
  • These fungi are associated with serious plant diseases like canker and dieback, impacting agriculture and forestry.
  • Routine surveys are crucial for identifying and understanding fungal diversity and their roles in ecosystems.

Purpose of the Study:

  • To conduct a comprehensive survey of Botryosphaeriaceae fungi in Thailand.
  • To identify and describe fungal species using morphological and molecular phylogenetic methods.
  • To document new records and novel species of Botryosphaeriales for Thailand.

Main Methods:

  • Fungal isolates were collected from various plant hosts across Thailand.
  • Morphological characteristics were used for initial identification.
  • Phylogenetic analysis was performed using the internal transcribed spacer (ITS) and elongation factor 1-alpha (EF1-α) gene regions.
  • A combined dataset of gene regions was analyzed to construct a phylogenetic tree.

Main Results:

  • The phylogenetic analysis resolved 11 distinct and well-supported clades within the Botryosphaeriales.
  • Established species such as Lasiodiplodia theobromae, L. pseudotheobromae, and Neofusicoccum parvum were confirmed in Thailand.
  • New records for Thailand include Pseudofusicoccum adansoniae and P. ardesiacum.
  • Four new species were described: Diplodia neojuniperi, Lasiodiplodia thailandica, Pseudofusicoccum artocarpi, and Aplosporella artocarpi.
  • A sexual morph was newly reported for Lasiodiplodia gonubiensis.

Conclusions:

  • The study significantly expands the known diversity of Botryosphaeriaceae in Thailand.
  • The identification of novel species and new records highlights the importance of ongoing fungal surveys.
  • Further research is needed to ascertain the pathogenicity and ecological impact of these fungi on Thai woody hosts.