Effects of cultivation, conditioning and isolate on sclerotium germination in Sclerotium cepivorum |
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| Authors: | H D BRIX V ZINKERNAGEL |
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| Institution: | Lehrstuhl für Phytopathologie der TU München-Weihenstephan, 8050 Freising 12, Germany |
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| Abstract: | Sclerotium germination in various isolates of S. cepivorum was studied following different cultivation and conditioning treatments. A simple and rapid laboratory test was developed to trigger sclerotial germination under unsterile conditions. In most isolates, sclerotia produced under sterile and unsterile conditions showed a constitutive dormancy immediately after maturing. In contrast to this, the sclerotia of some isolates germinated quite well as soon as they were mature. The dormancy of sclerotia from axenic cultures broke down after storage in soil for 12 weeks. In a few cases sclerotia produced under unsterile conditions germinated remarkably well. Freezing and thawing of sclerotia decreased the ability of most isolates to germinate. |
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