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Factors Affecting Germination and the Mode of Germination of Zygospores of Choanephora cucurbitarum
Author(s) -
Yu M. Q.,
Ko W. H.
Publication year - 1997
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.1439-0434.1997.tb00414.x
Subject(s) - germination , biology , sporangium , spore , horticulture , botany
Treatment of zygospores of Choanephora cucurbitarum with KMnO 4 , NaClO or H 2 O 2 effectively activated the spores and induced their germination. The optimum concentration of KMnO 4 for activation of zygospores was 0.25 to 0.5%. Zygospores were not able to germinate in darkness even after activation by KMnO 4 . When zygospores from 40 to 50‐day‐old cultures were treated with 0.5% KMnO 4 solution for 60 min before incubation on water agar at 24% under light, about 50% germinated in 10 days. KMnO 4 treatment killed more than 99% of residual mycelial fragments, sporangiospores and sporangiola in the zygospore suspension. During germination disappearance of oil droplets in zygospores occurred prior to the cracking on zygospore wall. Both sporangial germination and mycelial germination were found. Moreover, sporangiole germination was observed for the first time.