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本文主要研究葡萄孢菌 (Botrytis cinerea)在 2 0、10、4、2、0、- 2和 - 4℃下菌丝生长和孢子萌发的情况 ,以及在同样温度下对菊苣 (Cichorium intybus L.)致病力的影响。尽管在 PDA培养基上 0℃以下低温明显地抑制菌丝生长和推迟孢子的萌发时间 ,但葡萄孢菌仍能在 - 4℃下 14d后达到 10 0 %的萌发率 ,2 4周后菌落的生长直径为 10 mm。用 Botrytis cinerea孢子接种的菊苣在 - 2℃下 6周以前的发病率较低 ,在 - 4℃下 8周以前没有病害发生 ,但随着贮藏时间的延长 ,发病率逐渐上升 ,12周后腐烂率达到 77%和 71% ,病害严重程度指数分别为 37和 31。菊苣贮藏在 - 2℃和 - 4℃下后期腐烂率的快速增加可能与此时菊苣产生冷害有关。
In this paper, the mycelial growth and spore germination of Botrytis cinerea at 20, 10, 4, 2, 0, -2 and -4 ℃ were studied, and the effects of Cichorium intybus L. ) The impact of pathogenicity. Although hypoxia significantly inhibited mycelial growth and postponed spore germination on PDA medium at temperatures below 0 ° C, Botrytis sp. Still reached a 10% germination rate after 14 days at -4 ° C. After 24 weeks colonies Growth diameter of 10 mm. The chicory inoculated with Botrytis cinerea spores had a low incidence of disease 6 weeks earlier at -2 ° C and no disease occurred 8 weeks earlier at -4 ° C. However, the incidence gradually increased after storage for 12 weeks The rates reached 77% and 71% respectively, and the disease severity indices were 37 and 31 respectively. The rapid increase of late-stage decay rate of chicory stored at -2 ℃ and -4 ℃ may be related to chilling injury of chicory.