Moniliophthora perniciosa, the mushroom causing witches' broom disease of cacao: Insights into its taxonomy, ecology and host range in Brazil
| Autor: | João P.M. Araújo, Samuel Galváo Elias, Robert W. Barreto, Harry C. Evans, Daniela O. Lisboa |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Theobroma Phytoplasma Disease Population Moniliophthora 01 natural sciences Moniliophthora perniciosa Host Specificity 03 medical and health sciences Genetics education Ecology Evolution Behavior and Systematics Ecosystem Phylogeny 030304 developmental biology Plant Diseases 0303 health sciences Heteropterys education.field_of_study Cacao Phylogenetic tree biology Ecology Broom biology.organism_classification Infectious Diseases Taxonomy (biology) Agaricales Brazil 010606 plant biology & botany |
| Zdroj: | Fungal biology. 124(12) |
| ISSN: | 1878-6146 |
| Popis: | Witches' broom caused by Moniliophthora perniciosa is the main disease of cacao (Theobroma cacao) in Brazil. The fungus is known to occur on other host families and these populations have been addressed in the literature as biotypes: C (Malvaceae); H (Malpighiaceae); L (Bignoniaceae) and S (Solanaceae). No complete elucidation of the phylogenetic relationships of isolates obtained from this disparate host range appears in the literature. One member of H (ex Heteropterys acutifolia) has been described as a distinct species. But should other biotypes be also recognized as distinct taxa? In the present study, a survey yielding 24 isolates of M. perniciosa from ten hosts and covering a wide range of geographic regions in Brazil was undertaken. These isolates were compared with those from T. cacao using three DNA regions for the phylogenetic analyses: ITS, LSU and RPB1. Morphology was also examined. All isolates in this study were found to belong to M. perniciosa, including the population from H. acutifolia, formerly treated as Moniliophthora brasiliensis but reduced here to a synonym of M. perniciosa. This species ranged from pathogenic to a previously unreported occurrence as a non-pathogenic endophyte in the Atlantic rainforest tree Allophylus edulis (Sapindaceae). M. perniciosa was recorded on a range of solanaceous hosts (16 species) over a wide variety of ecosystems. The ecological and evolutionary significance of these novel findings are discussed. |
| Databáze: | OpenAIRE |
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