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Ascospore release and survival in Sclerotinia sclerotiorum

Published online by Cambridge University Press:  13 May 2003

John P. CLARKSON ,
John STAVELEY ,
Kath PHELPS ,
Caroline S. YOUNG  and
John M. WHIPPS
John P. CLARKSON
Affiliation:
Horticulture Research International, Wellesbourne, Warwick CV35 9EF, UK. E-mail: john.clarkson@hri.ac.uk
John STAVELEY
Affiliation:
Department of Applied Sciences, Geography and Archaeology, University College Worcester, Henwick Grove, Worcester WR2 6AJ, UK.
Kath PHELPS
Affiliation:
Horticulture Research International, Wellesbourne, Warwick CV35 9EF, UK. E-mail: john.clarkson@hri.ac.uk
Caroline S. YOUNG
Affiliation:
ADAS Consulting Ltd, ADAS Wolverhampton, ‘Woodthorne’, Wergs Road, Wolverhampton WV6 8TQ, UK.
John M. WHIPPS
Affiliation:
Horticulture Research International, Wellesbourne, Warwick CV35 9EF, UK. E-mail: john.clarkson@hri.ac.uk
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Abstract

The release and survival of ascospores of a UK Sclerotinia sclerotiorum isolate were studied. Apothecia placed in a spore clock apparatus with different lighting regimes at 15 °C released ascospores continuously with an increasing rate for the duration of experiments (72–84 h). Spore release was not confined to light or dark periods in alternating regimes and occurred in continuous dark or light. Ascospores were released in both saturated air (90–95% rh) and at 65–75% rh. High temperature and rh were detrimental to ascospore survival but spore viability was maintained for longer periods than previously reported. The significance of these results in relation to disease control is discussed.

Type
Research Article
Information
Mycological Research , Volume 107 , Issue 2 , February 2003 , pp. 213 - 222
Copyright
© The British Mycological Society 2003

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