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Title Transcription
キク カッパンビョウキン SEPTORIA OBESA ノ ブンセイホウシ ノ ハツガ ニ エイキョウ オ オヨボス ヨウイン
Title Alternative (English)
Factors Affecting Conidium Germination of Septoria obesa, Casual Fungus of Brown Spot of Cultivated Chrysanthemum
File
language
eng
Author
Honda, Yuichi
Miyawaki, Takashi
Description
Inoculum concentration, age of cultures from which conidia were taken and light conditions were examined as factors affecting condium germination of S. obesa. Conidia for inoculation were taken from cultures which were started by streaking the conidia to vegetable juice agar plates and incubated under continuous light. When the concentration of the inoculum was 10^6 conidia/ml (= 3500 conidia/ <cm>^^^2 agar plate), germination of conidia was suppressed strongly even the conidia were taken from young cultures. At a lower concentration of <10>^^^5 conidia/ml (= 350 conidia/<cm>^^^2 agar plate), conidia germinated well. Germination of conidia which were taken from cultures with one-week incubation under continuous irradiation of near ultraviolet radiation (NUV) was not suppressed by light during germination. However, conidia which were taken from cultures with 4-week incubation under continuous NUV irradiation were completely inhibited to germinate by light. Effective wavelengths for suppression of conidium germination were NUV region shorter than 357 nm. Near ultraviolet radiation also suppressed the growth of germ tubes. From these observations it will be concluded that viability of conidia of S. obesa decreased by continuous irradiation of NUV and germination of conidia is suppressed by the same wavelengths of radiation.
Journal Title
Bulletin of the Faculty of Agriculture, Shimane University
Volume
22
Start Page
161
End Page
175
ISSN
0370940X
Published Date
1988-12-21
NCID
AN00108015
Publisher
島根大学農学部
Publisher Aalternative
Shimane University, Faculty of Agriculture
NII Type
Departmental Bulletin Paper
OAI-PMH Set
Faculty of Life and Environmental Science
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