What is it about?
This study was conducted to isolate, purify, and identify (molecularly) most fungi from the soil at the emerging seedling, root, crown, stem, head, and rhizosphere at symptom occurrence, and also to deepen and enlarge our current understanding of the causal agents of these symptoms observed in the wheat fields. Based on molecular identification methods as well as the analysis of phylogenetic trees, the results of this study have verified that the main species belonging to the genus Fusarium causing FHB and FCR diseases on wheat in the studied areas are F. pseudograminearum, F. graminearum, F. equiseti, F. culmorum, F. solani, F. avenaceum, F. chlamydosporum, F. cerealis, and F. nygamai. The first 3 species have been identified previously in several Iraqi studies on wheat and barley.
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Why is it important?
This is the first record of the last 6 Fusarium species from the wheat crop in Iraq as causative pathogens of FHB and FCR. Individual phylogenetic trees of 71 Fusarium isolates reconstructed based on the internal transcribed spacer (ITS) sequences showed that all isolates belonging to each of the 9 Fusarium species form monophyletic groups with identical isolates of the same species. Collective phylogenetic tree of the remaining 17 Fusarium isolates reconstructed based on translation elongation factor 1 alpha (TEF1-α) gene sequences showed that all isolates belonging to each of the 4 Fusarium species forms monophyletic groups with identical isolates of the same species.
Perspectives
This study was conducted to deepen and enlarge our current understanding of the causal agents of these symptoms observed in the wheat fields and to isolate, purify, and identify (molecularly) the most common soil fungi occurring in the rhizosphere of seedlings showing, root, crown, stem, and head at symptom occurrence. Eighty-eight Fusarium isolates were isolated from 7 wheat cultivars planted in 14 fields in the south of Iraq, Basra province, by using polymerase chain reaction (PCR) technique.
Dr. Mohammed Hussein Minati
Read the Original
This page is a summary of: Novel report on six Fusarium species associated with head blight and crown rot of wheat in Basra province, Iraq, Bulletin of the National Research Centre, August 2019, Springer Science + Business Media,
DOI: 10.1186/s42269-019-0173-z.
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