Characterization and Pathogenicity of Soilborne Pathogens in Gloriosa superba: Effects of Single- and Multiple-Pathogen Coinfection on Disease Responses

Article


Dhanabalan, Shanmuga Priya, Johnson, Iruthayasamy, Kumaresan, Parthiban V., Kandasamy, Rajamani, Natesan, Senthil, Periyannan, Sambasivam and Muthusamy, Karthikeyan. 2024. "Characterization and Pathogenicity of Soilborne Pathogens in Gloriosa superba: Effects of Single- and Multiple-Pathogen Coinfection on Disease Responses." Plant Disease: an international journal of applied plant pathology. 108 (11), pp. 3279-3287. https://doi.org/10.1094/PDIS-03-24-0496-RE
Article Title

Characterization and Pathogenicity of Soilborne Pathogens in Gloriosa superba: Effects of Single- and Multiple-Pathogen Coinfection on Disease Responses

ERA Journal ID2647
Article CategoryArticle
AuthorsDhanabalan, Shanmuga Priya, Johnson, Iruthayasamy, Kumaresan, Parthiban V., Kandasamy, Rajamani, Natesan, Senthil, Periyannan, Sambasivam and Muthusamy, Karthikeyan
Journal TitlePlant Disease: an international journal of applied plant pathology
Journal Citation108 (11), pp. 3279-3287
Number of Pages9
Year2024
PublisherAmerican Phytopathological Society
Place of PublicationUnited States
ISSN0191-2917
1943-7692
Digital Object Identifier (DOI)https://doi.org/10.1094/PDIS-03-24-0496-RE
Web Address (URL)https://apsjournals.apsnet.org/doi/epdf/10.1094/PDIS-03-24-0496-RE
Abstract

Glory lily (Gloriosa superba), an ornamental climbing plant, contains the bioactive compound colchicine, attracting attention from the pharmaceutical industry. However, soilborne pathogens have emerged as a serious threat to the cultivation of glory lily, leading to substantial economic losses in the southern parts of India. Among these, the three major pathogens are Macrophomina phaseolina, Fusarium oxysporum, and Agroathelia rolfsii, causing dry root rot (also referred to as charcoal rot), wilt, and stem rot, respectively. Here, we characterized these pathogens using morphological characteristics and phylogenetic analysis of DNA sequences related to the internal transcribed spacer of ribosomal DNA, calmodulin (CAL), and translation elongation factor 1-alpha (TEF-1α). Furthermore, in the pathogenicity tests, the inoculation of M. phaseolina alone resulted in lesions measuring 7.54 ± 0.01 mm on tubers and 90% seedling mortality. This severity was comparable to the simultaneous inoculation of all three pathogens, indicating the prominence of dry root rot among soilborne diseases. This study marks the first detailed investigation of soilborne pathogens combined infection in G. superba, contributing to the understanding of fungal disease complexity in medicinal plants.

Keywordssingle and coinfection; wilt; collar rot; disease complex; Gloriosa superba; root rot
Contains Sensitive ContentDoes not contain sensitive content
ANZSRC Field of Research 2020300103. Agricultural molecular engineering of nucleic acids and proteins
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Byline AffiliationsTamil Nadu Agricultural University, India
School of Agriculture and Environmental Science
Centre for Crop Health
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