Chauhan Prashant, Tiwari Rahul Kumar, Saini Anil Kumar, Kumar Ankit, Rithesh Lellapalli
Department of Plant Pathology, Chaudhary Charan Singh (CCS) Haryana Agricultural University, Hisar, India.
Indian Institute of Sugarcane Research, Lucknow, India.
Front Microbiol. 2025 Aug 4;16:1478798. doi: 10.3389/fmicb.2025.1478798. eCollection 2025.
Potato ( L.), a member of the Solanaceae family, is a staple crop with vital importance for global food security. Various biotic and abiotic stresses affect potato crops in the field as well as in post-harvest conditions. Among biotic stresses, Fusarium dry rot, caused by the species complex, is considered a major threat to potato cultivation. is one of the most serious pathogens that causes dry rot in potatoes, resulting in huge yield losses. In addition, the pathogen variability depends on the ecogeographical region of potato cultivation. Therefore, to investigate the diversity, pathogenicity, and ecological variability of species associated with dry rot in potatoes, 55 dry rot samples of potatoes infected with spp. were collected, and from these samples, 53 isolates were retrieved and characterized through micromorphological and molecular methods. The studies revealed that the isolated spp. from the samples belonged to three species, namely , and . Among the collected species, was the most dominant species with a high percentage of occurrence frequency. Furthermore, the pathogenicity tests of each isolate were conducted through the tuber inoculation method. The study revealed that out of all isolates, was highly pathogenic to the susceptible potato cultivar Kufri Pukhraj. This study highlights the predominance and pathogenicity of among species causing dry rot in potatoes, providing critical insights for developing targeted management strategies to mitigate yield losses and enhance potato crop resilience.
马铃薯（Solanum tuberosum L.）是茄科植物的一员，是一种对全球粮食安全至关重要的主食作物。各种生物和非生物胁迫会影响田间以及收获后条件下的马铃薯作物。在生物胁迫中，由镰刀菌物种复合体引起的镰刀菌干腐病被认为是马铃薯种植的主要威胁。Fusarium sambucinum是导致马铃薯干腐病的最严重病原体之一，会造成巨大的产量损失。此外，病原体的变异性取决于马铃薯种植的生态地理区域。因此，为了研究与马铃薯干腐病相关的Fusarium物种的多样性、致病性和生态变异性，收集了55份感染Fusarium spp.的马铃薯干腐病样本，并从这些样本中检索出53个Fusarium分离株，通过微观形态学和分子方法对其进行了鉴定。研究表明，从样本中分离出的Fusarium spp.属于三个物种，即Fusarium sambucinum、Fusarium avenaceum和Fusarium culmorum。在所收集的物种中，Fusarium sambucinum是最主要的物种，出现频率百分比很高。此外，通过块茎接种法对每个分离株进行了致病性测试。研究表明，在所有分离株中，Fusarium sambucinum对易感马铃薯品种Kufri Pukhraj具有高度致病性。这项研究突出了Fusarium sambucinum在导致马铃薯干腐病的Fusarium物种中的优势和致病性，为制定有针对性的管理策略以减轻产量损失和增强马铃薯作物恢复力提供了关键见解。
