Identification, Phylogeny, and Fungicide Sensitivity of Oomycota Species Causing Stem and Root Rots on Chrysanthemums in Korea.

IF 1.6 4区生物学 Q2 AGRONOMY

Mycobiology Pub Date : 2025-03-09 eCollection Date: 2025-01-01 DOI:10.1080/12298093.2025.2472444

Seung Hyun Lee, Young-Joon Choi

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Abstract

Root and stem rot, caused by Pythiales (Oomycota), poses a significant threat to chrysanthemum (Chrysanthemum spp.) cultivation worldwide. In Korea, previously undocumented rot and blight symptoms were observed on stems, roots, and leaves of Chrysanthemum morifolium (=Dendranthema morifolium), a chrysanthemum species with high global production. This study identified the causal agents as Globisporangium ultimum and Phytopythium helicoides based on morphological features and molecular phylogenetic analysis of the internal transcribed spacer rDNA (ITS) region and the cytochrome c oxidase subunit mtDNA (cox1 and cox2) genes. Pathogenicity assay demonstrated the high aggressiveness of both species toward chrysanthemums. Fungicide sensitivity testing revealed high sensitivity to picarbutrazox, highlighting its potential as an effective control measure. These findings enhance our knowledge of identifying and managing G. ultimum and P. helicoides in chrysanthemum cultivation.

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来源期刊

Mycobiology AGRONOMYMYCOLOGY-MYCOLOGY

CiteScore

3.90

自引率

5.30%

发文量

审稿时长

22 weeks

期刊介绍： Mycobiology is an international journal devoted to the publication of fundamental and applied investigations on all aspects of mycology and their traditional allies. It is published quarterly and is the official publication of the Korean Society of Mycology. Mycobiology publishes reports of basic research on fungi and fungus-like organisms, including yeasts, filamentous fungi, lichen fungi, oomycetes, moulds, and mushroom. Topics also include molecular and cellular biology, biochemistry, metabolism, developmental biology, environmental mycology, evolution, ecology, taxonomy and systematics, genetics/genomics, fungal pathogen and disease control, physiology, and industrial biotechnology using fungi.