Lee Seung Hyun, Choi Young-Joon
Department of Biological Science, Kunsan National University, Gunsan, South Korea.
Center for Convergent Agrobioengineering, Kunsan National University, Gunsan, South Korea.
Mycobiology. 2025 Mar 9;53(3):9-18. doi: 10.1080/12298093.2025.2472444. eCollection 2025.
Root and stem rot, caused by Pythiales (Oomycota), poses a significant threat to chrysanthemum ( spp.) cultivation worldwide. In Korea, previously undocumented rot and blight symptoms were observed on stems, roots, and leaves of (=), a chrysanthemum species with high global production. This study identified the causal agents as and based on morphological features and molecular phylogenetic analysis of the internal transcribed spacer rDNA (ITS) region and the cytochrome c oxidase subunit mtDNA (1 and 2) 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 and in chrysanthemum cultivation.
由霜霉目（卵菌纲）引起的根腐病和茎腐病对全球菊花（品种）种植构成重大威胁。在韩国，在全球产量较高的菊花品种菊花脑（Dendranthema indicum (L.) Des Moul.）的茎、根和叶上观察到了以前未记录的腐烂和枯萎症状。本研究基于内部转录间隔区核糖体DNA（ITS）区域以及细胞色素c氧化酶亚基线粒体DNA（cox1和cox2）基因的形态特征和分子系统发育分析，确定致病病原体为层出绵霉（Achlya层出绵霉）和德巴利腐霉（Pythium debaryanum）。致病性测定表明这两个物种对菊花都具有高度侵袭性。杀菌剂敏感性测试显示对唑胺菌酯高度敏感，突出了其作为有效防治措施的潜力。这些发现增强了我们对菊花种植中识别和管理层出绵霉和德巴利腐霉的认识。
