European Journal of Forest Pathology (1996) 26, 12-24

A. Vannini, R. Paganini and N. Anselmi (1996)
Factors affecting discharge and germination of ascospores of Hypoxylon mediterraneum (De Not.) Mill.
European Journal of Forest Pathology 26 (1), 12-24
Abstract: Discharge and germination of ascospores of Hypoxylon mediterraneum (=Biscogniauxia mediterranea (De Not.) O. Kuntze) were studied. Discharge and germination of ascospores depend on the presence of water or high relative air humidity. Ascospores are ejected from stromata in forest for most of the year following periods of high precipitation.
H. mediterraneum ascospores germinated under a wide range of biotic and abiotic conditions. The optimal temperature for germination was 35°C, but 25 and 30°C were still favourable, while 20 and 40°C reduced germination. Ascospores kept at 5°C were able to germinate after short exposure to temperatures ranging from 20 to 35°C. Germination rate depended on the ascospore density in in vitro experiments, and was highest at 10⁶ ascospore/ml.
Tissues of some host plants greatly increased germination rate. In vivo, ascospores germinated better on wounded axillary tissues than on unwounded ones.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Andrea Vannini, Naldo Anselmi

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

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Biscogniauxia mediterranea