Phylogenetic and Morphological Identification of the Novel Pathogen of Rheum palmatum Leaf Spot in Gansu, China
Mycobiology
;
: 93-98, 2016.
Article
in English
| WPRIM
| ID: wpr-729447
ABSTRACT
A new leaf spot disease was observed on leaves of Rheum palmatum (Chinese rhubarb) in Northwest China (Gansu Province) starting in 2005. A Septoria-like fungus was isolated and completion of Koch's postulates confirmed that the fungus was the casual agent of the leaf spot disease. Morphology and molecular methods were combined to identify the pathogen. The fungus produced conidiomata pycnidia and the conidia were 2~5 septate, 61.2~134.1 µm in length and 3.53~5.3 µm in width, which is much larger than the known Spetoria species that infects Polygonaceae species. Phylogenic analysis of the internal transcribed spacer region confirmed that this Spetoria-like fungus is within the Spetoria genus but distinct from known Spetoria species. Together, these morphological and phylogenetic data support that the R. palmatum infecting Spetoria strain is a newly-described plant pathogenic species.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Plants
/
Rheum
/
Spores, Fungal
/
China
/
Classification
/
Polygonaceae
/
Fungi
Type of study:
Diagnostic study
Country/Region as subject:
Asia
Language:
English
Journal:
Mycobiology
Year:
2016
Type:
Article
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