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Seasonal Variation in Sporulation of Phytophthora infestans
Author(s) -
Sujkowski L. S.
Publication year - 1986
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.1986.tb04374.x
Subject(s) - biology , spore , phytophthora infestans , mycelium , fungus , botany , agar , zoospore , potato dextrose agar , horticulture , agar plate , blight , bacteria , genetics
Sporulation ability of two isolates of Phytophthora infestans maintained on potato tuber slices of a susceptible cv. ‘Bintje’ and on‐rye agar medium was studied for four years (1981–1984). This feature of the fungus was shown to vary in particular seasons during the year. Significantly higher sporulation density per cm 2 of aerial mycelium on potato tuber slices was observed in winter and late autumn while significantly lower sporulation was found in spring. Similar tendencies were observed when one of the isolates was cultivated on rye agar medium under controlled conditions. Positive correlation was found between sporulation patterns of isolates of the fungus maintained on rye agar and on tuber slices. Hypothesis has been proposed that these changes are due, to a biorhythm in the fungus.