Responses of resting sporangia ofSynchytrium endobioticumto in vitro germination treatments

Potato Wart Caused bySynchytrium Eendobioticum: Past and Future Emphases in Research

“…Another common problem centred on the remarkable differences in percent germination occasionally ecnountered in otherwise uniformly treated controls; germination percentages differed according to the season, high in spring/summer and low in the autumn. These observations have been documented recently in experiments aimed at quantifying inoculum, both in vitro and in vivo (Hampson 1977b(Hampson , 1980. Transfer and deposition of zoospores.…”

“…Kohler (1924) recommended using an antibiotic substance, but did not name any. The problem remained unsolved for 50 years until Hampson (1980) found that sodium merthiolate produced contaminant-free cultures that would be kept clean for at least 18 weeks. Another common problem centred on the remarkable differences in percent germination occasionally ecnountered in otherwise uniformly treated controls; germination percentages differed according to the season, high in spring/summer and low in the autumn.…”

“…(1981) in Ireland and Newfoundland, respectively are currently undertaking studies on morphology and on the interactions of sporangia and zoospores, using scanning and transmission electron microscopy. Hampson (1980) recently completed a series of time-studies on maturation of the sporangium of S. endobioticum. Viability was a concern of Glynne (1926) of the United Kingdom in the'golden era' of research into the biology of S. endobioticum, and was also featured in studies in the Soviet Union by Sharikov (Kharitonova & Tarasova 1971).…”

Seasonal changes in the germination behaviour ofSynchytrium endobioticum,the causal agent of potato wart disease

“…Hampson (1984) found three peaks of increased wart infection to be separated by 8-week intervals. In an earlier study, Hampson (1980) reported changes in population viability of S. endobioticum pathotype 2 to be in 6-8 week cycles. The present study revealed peaks of germination activity and certain of these were 8 weeks apart.…”