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Related Concept Videos

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Related Experiment Video

Updated: Jul 27, 2025

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First Report of

Xianjing Lin1, Qingtao Wu2, Juan Chen3

  • 1Hunan University of Science and Technology, 12518, Xiangtan, Hunan, China; linxianjing@mail.hnust.edu.cn.

Plant Disease
|June 9, 2023
PubMed
Summary

A new leaf blight disease caused by Pestalotiopsis trachicarpicola was identified in Panax notoginseng plants in Hunan, China. This finding is crucial for managing this destructive disease in the valuable medicinal herb.

Keywords:
<italic>Panax notoginseng</italic><italic>Pestalotiopsis trachicarpicola</italic>Leaf Blight

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Area of Science:

  • Plant Pathology
  • Mycology
  • Medicinal Botany

Background:

  • Panax notoginseng is a vital Chinese medicinal herb for neurological and cardiovascular conditions.
  • Leaf blight disease significantly impacts P. notoginseng cultivation, affecting its economic value.
  • Disease outbreaks necessitate accurate pathogen identification for effective management strategies.

Purpose of the Study:

  • To identify the causal agent of leaf blight disease affecting Panax notoginseng in Hunan, China.
  • To provide morphological and molecular data for pathogen identification.
  • To confirm the pathogenicity of the isolated agent and establish its role in the disease.

Main Methods:

  • Isolation and purification of fungal pathogens from infected P. notoginseng leaves.
  • Morphological characterization of fungal colonies and conidia.
  • Molecular identification using rDNA internal transcribed spacer (ITS), translation elongation factor 1-alpha (tef1), and β-tubulin (TUB2) gene sequencing.
  • Phylogenetic analysis to confirm species identification.
  • Pathogenicity tests to fulfill Koch's postulates.

Main Results:

  • A fungal isolate, PB2-a, was obtained from symptomatic P. notoginseng leaves.
  • Morphological analysis revealed characteristic conidia and colony features.
  • Molecular sequencing and phylogenetic analysis identified the isolate as Pestalotiopsis trachicarpicola.
  • Pathogenicity tests confirmed P. trachicarpicola as the causal agent of leaf blight on P. notoginseng.
  • This is the first report of P. trachicarpicola causing leaf blight on P. notoginseng in Hunan, China.

Conclusions:

  • Pestalotiopsis trachicarpicola is identified as the causal agent of leaf blight on Panax notoginseng in Hunan, China.
  • Accurate identification of this pathogen is essential for developing effective disease management strategies.
  • This research contributes to the protection of P. notoginseng, a valuable medicinal plant.