Biology and Earth Science Faculty Scholarship
Document Type
Article
Publication Date
6-16-2007
Publisher
The American Phytopathological Society
Keywords
fruit mummification, fruit rot
Abstract
Monilinia vaccinii-corymbosi, the causal agent of mummy berry disease, infects blueberry flowers via the gynoecial pathway. To describe the expression of host resistance in highbush blueberry (Vaccinium corymbosum), fungal growth in the styles and colonization of the locules were compared among five blueberry cultivars in a series of controlled greenhouse experiments. Styles were harvested 1 and 4 days postinoculation, and the length colonized by hyphae was determined using fluorescence microscopy. At 8 weeks after inoculation, fruit were harvested and scored for the presence of hyphae in the locules. The infection frequency of styles ranged from 0.33 to 0.71, and only cv. Weymouth had significantly lower infection frequency than the other cultivars. The mean length of the colonized portion of the stylar canal ranged from 0.126 to 0.434 mm after 1 day and 1.62 to 3.59 mm after 4 days. Hyphae in the styles of cv. Weymouth exhibited the least growth, whereas hyphae in the styles of cultivars Jersey and Rancocas were significantly longer. The distance of style penetrated for cultivars Bluecrop and Coville was intermediate. The mean disease incidence of locules differed significantly. Values for cultivars Weymouth and Jersey were the smallest (0.038 and 0.039) and largest (0.249 and 0.236), respectively. The results demonstrate that a component of resistance to infection by M. vacciniicorymbosi is expressed during growth in the gynoecial pathway.
First Page
852
Last Page
856
Volume
91
Issue
7
Repository Citation
Lehman, Jeffrey, "Host Resistance to Monilinia vaccinii-corymbosi in Flowers and Fruits of Highbush Blueberry" (2007). Biology and Earth Science Faculty Scholarship. 13.
https://digitalcommons.otterbein.edu/bio_fac/13
Original Citation
Lehman, J. S., Igarashi, S., & Oudemans, P. V. (2007). Host Resistance to Monilinia vaccinii-corymbosi in Flowers and Fruits of Highbush Blueberry. Plant Disease, 91(7), 852-856. doi:10.1094/pdis-91-7-0852
DOI
10.1094/pdis-91-7-0852
Version
Publisher's Version
Peer Reviewed
1
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.