Assefa, Addisu
- Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences
- Addis Ababa University
- Madawalabu University
Research article2015Peer reviewedOpen access
Corynelia uberata as a threat to regeneration of Podocarpus falcatus in Ethiopian forests: spatial pattern and temporal progress of the disease and germination studies
Assefa, Addisu; Abate, D.; Stenlid, Jan
Abstract
The order Coryneliales includes several fungi such as Corynelia spp. that are pathogenic to trees in the Podocarpaceae. The aim of this study was to assess the spatial pattern and temporal progress of disease caused by Corynelia uberata on Podocarpus falcatus in Ethiopian forests and to evaluate the germination potential of seed retrieved from fruit infected by C.uberata. Corynelia uberata was found on leaves, young stems and/or on fruit of P.falcatus in Ethiopian forests. Spatial analysis in the Adaba-Dodola forest showed that disease intensity of C.uberata was significantly higher in non-WAJIB' blocks (disturbed forest) than WAJIB' blocks (sustainably managed forest) (P<00001). In the temporal disease progress study, a significantly higher incidence and severity of disease on fruit was recorded during the wet season relative to dry season (P<00001). The green milk stage of fruit exhibited significantly higher mean incidence (P<00001) and severity (P<00001) of disease compared to other growth stages of fruit. The disease incidence and severity in general, as well as on different fruit growth stages, were highly correlated (P<00001, R(2)095). Germination rate of seed decreased significantly with an increase in the level of fruit infection by C.uberata (P<00001). Thus, C.uberata can apparently influence germination of seed and may pose a threat to the regeneration of P.falcatus from seeds in Ethiopian forests.
Keywords
Corynelia uberata; disease intensity; Ethiopia; fruit and seed infection; seed germination
Published in
Plant Pathology
2015, volume: 64, number: 3, pages: 617-626
Publisher: WILEY-BLACKWELL
SLU Authors
Stenlid, Jan
- Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences
- Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences
Associated SLU-program
SLU Plant Protection Network
Global goals (SDG)
UKÄ Subject classification
Ecology
Publication identifier
- DOI: https://doi.org/10.1111/ppa.12295
Permanent link to this page (URI)
https://res.slu.se/id/publ/67436