Characterization and Pathogenicity of Botryosphaeriaceae Fungi Associated with Declining Urban Stands of Coast Redwood in California
| Autor: | Srđan G. Aćimović, Donald M. Grosman, Suzanne Rooney-Latham, Sebastian Albu, Joseph J. Doccola |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine Population Dynamics Sequoia Plant Science Polymerase Chain Reaction 01 natural sciences California 03 medical and health sciences Intergenic region Ascomycota Phylogenetics parasitic diseases Botany Ornamental plant Cities DNA Fungal Phylogeny Plant Diseases biology fungi Botryosphaeriaceae biology.organism_classification Pathogenicity 030104 developmental biology Genetic marker Agronomy and Crop Science 010606 plant biology & botany Woody plant |
| Zdroj: | Plant Disease. 102:1950-1957 |
| ISSN: | 1943-7692 0191-2917 |
| Popis: | Coast redwood (Sequoia sempervirens) is among the most widely planted landscape trees in California (CA) but is in decline outside its natural range due to factors including prolonged drought and plant pathogens. We investigated associations of Botryosphaeriaceae fungi with declining coast redwood trees throughout CA. More than 100 samples were collected from 11 coastal and inland locations in CA. Fifty-nine Botryosphaeria-like fungal strains were isolated and 18 were selected for further study. Phylogenetic analysis of ITS and EF-1α sequence data confirmed the presence of Botryosphaeria dothidea, Neofusicoccum australe, N. luteum, N. mediterraneum, and N. parvum. Pathogenicity testing showed that although the Neofusicoccum species vary in virulence, all are more virulent that B. dothidea. N. australe caused the largest lesions, followed by N. luteum, N. parvum, and N. mediterraneum. Of the species recovered, only B. dothidea has been previously confirmed as a pathogen of coast redwood in CA. These results confirm that multiple Botryosphaeriaceae species are associated with branch decline and dieback on coast redwood in CA, which agrees with similar studies on woody agricultural crops. Accurate diagnosis of fungal pathogens of coast redwood is important for the development of disease management strategies and may help improve horticultural practices in maintenance of urban stands. |
| Databáze: | OpenAIRE |
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