Phytoparasitica (1997) 25, 50-51

M.J. Gosbee, G.I. Johnson, D.C. Joyce and J.A.G. Irwin (1997)
Infection pathway of the stem end rot fungus, Dothiorella dominicana, in 'Kensington' mango
Phytoparasitica 25 (1), 50-51
Fifth International Mango Symposium, September 1-6, 1996, Tel Aviv, Israel, poster
Abstract: Dothiorella dominicana (Dd) is one of several pathogens causing stem end rot of mangoes in Australia and other countries. Dd is also recovered after triple sterilization from symptomless seedlings grown from infected fruit, suggesting endophytism. This experiment aimed to trace the infection pathway of the pathogen from the inoculum placed onto the cut stem end of the fruit to the seedling. 'Kensington' mangoes obtained from the Northern Territory were inoculated with Dd. Fruits were surface-sterilized and isolations made from 18 points in the fruit and seed at 0, 1, 2, 4, 6, 8 and 11 days after inoculation. Uninoculated controls were assayed on days 0, 4, 8 and 11. The fungi grew down the vascular tissue into the peduncle (day 2) and pedicel (day 4), and under the skin (day 6). Colonization preceded lesion development, which began on day 8. The seed was infected first through the funiculus (day 6) and seed coats (day 8) and then into the seed (day 8-11), where it caused decay. Dd was not detected in the control fruit. Seedlings grown from inoculated fruit showed highest recovery of Dd in the connective tissue between the seed and seedling and the hypocotyl zone. These results have implications for the control of the disease and are part of a study into the endophytic infection of mango by Dd.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Daryl C. Joyce

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Dothiorella dominicana	Mango (Mangifera indica)	Australia (NT+QLD)