• Journal of Ginseng Research
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• 제22권4호
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• pp.304-309
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• 1998

Incubation condition affecting the chlamydospore formation and isolation from mycelia and conidia of Cylindrocarpon destructanse (isolate ACY-9701), isolated from the root rot lesion of the American ginseng (Panax quinquefolium) was investigated. Chlamydospores were formed from mycilia but not from conidia on the Czapek-Dox agar without carbon or nitrogen source after 20 days incubation at 2$0^{\circ}C$. In the medium added with nitrogen and carbon sources, immatured chlamy-dospore-like cells were formed from microconidia and mycelia as well. Immatured chlamydospore-like cells were formed from mycelia as well as microconidia In corn, kidney bean, and pea root extracts after 20 days incubation at 20"C, while typical chlamydospores were formed from both of them in the root extract of Panax quinquefolium. The 3.6 log chlamydospore/mm" was converted from microconidia in the medium, which was equal to 2.5% conidia formed. Under the light condition (251.1 pmol/m" sec, 12 hrs dark and light cycle), 4.2 log/mm" of chlamydospores were converted from interracially or terminal cells of macroconidia, which was 4.0% of macroconidia produced on Potato dextrose agar (PDA). When mycelia and microconidia were stored at -7$0^{\circ}C$ for 32 days and incubated on PDA after thawing at room temperature to isolate chlamydospores from them, microconidia and mycelia were still alive. Meanwhile, microconidial lysis was found after heating them at 32$^{\circ}C$ for 7 days, but the chlamydospores converted from macroconidia were not lysed up to 13 days at 32"C. to 13 days at 32"C.ot;C.

• Journal of Ginseng Research
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• 제24권2호
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• pp.53-57
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• 2000

인삼 뿌리썩음병균 Cylindrocarpon destructans 균사체를 homogenization 단독 처리로 분쇄할 경우 균사체 절편길이는약 400$\mu\textrm{m}$이고 용액내에 복잡하게 뭉쳐있으며 후막포자의 순수분리율은 9.8%로 측정되었다. 그러나 homogenization으로 전처리 한후 초음파 처리를 부가하여 실시한 결과, 처리시간 20초 경과부터 분쇄된 균사체는 용액내에 고루 분포되었고 90초간 초음파 처리후에는 균사체 길이가 20$\mu\textrm{m}$ 정도로 되었으며 전체 후막포자중 74.3%의 후막포자가 균사체로부터 분리되었다. C. destructans 균사체의 homogenization단독처리시 후막포자들의 사슬은 세포수 I~8개로 형성된 것이 관찰되나 초음파를 부가로 처리한 결과 I~4개의 후막포자 세포로 구성된 사슬만이 관찰되었다. 초음파 처리로서 분리된 후막포자 사슬중에서 각 구성세포의 발아율은 potato dextrose agar(PDA)에서 20。C, 2일간배양한 결과 46.8%로 측정되었으며 5줄에서 13일간으로 장기간 배양한 결과 발아율은 60.7%로 측정되었다. C. destructans 균사체를 초음파처리하여 분리된 후막포자는 20。C, PDA배지 배양조건에서 총 후막포자 세포수에 대해 발아한 후막포자 세포의 발아율은 55.8%이며 총 후막포자 사슬군(catenae)에 대해서 발아한 각 후막포자 사슬군의 발아율은 73.4%의 비율로 측정되었다.