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題 名 | 土壤因子與拮抗菌對百合根腐病菌(Rhizoctonia solani)存活的影響=Effect of Ecological Factors and Antagonist on the Survival of Rhizoctonia solani on Lily Stem |
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作 者 | 吳文希; 鍾宜穎; 林美圻; | 書刊名 | 植物病理學會刊 |
卷 期 | 9:3 2000.09[民89.09] |
頁 次 | 頁123-130 |
分類號 | 435.456 |
關鍵詞 | 百合; 立枯絲核菌; 生態因子; Lily; Rhizoctonia solani; Ecological factors; Bacillus megaterium; |
語 文 | 中文(Chinese) |
中文摘要 | 立枯絲核菌係造成百合根腐病的主因之一,當將纏據於無菌百合組織上的本菌,置於壤土的不同生態條件下,即-1.37、-0.51、-0.23及-0.12 bar之水份潛勢,20、25、30及35°C的土壤溫度,及5、10、20及30公分的土壤深度中;其中水份潛勢及時間顯著地影響立枯絲核菌之存活,水份潛勢愈小,時間越久,病原的存活率愈?。當壤土中添加Bacillus megaterium18或S26,24-40天之後,土中之微生物活性增日,因而立枯絲核菌的族群減少;當壤土中的水份潛勢為-1.37bar或溫度為35°C時,在其中添加拮抗細菌可有效地降底病原族群,尤其是添加量為1010cfu/g土壤時,效果更形明顯。B. megaterium 18或S26並不會影響或抑制百合在壤土中之生長,當壤土的水份潛勢為-0.51 bar 時,以B. megaterium18或S26處理百合,可顯著地(p=0.05)抑制立枯絲核菌對百合的侵害。 |
英文摘要 | Rhizoctonia solani was one of the most important pathogens to cause rot rot of lilies. Rhizoctonia solani-colonized lily tissues were used to test the survivability of R. solani under various soil conditions. Loam soil was used in this study. Four different water potentials(i.e. -1.37, -0.51, -0.23, and -0.12 bar), temperatures (20, 25, 30 and 35°C), and soil depths (5, 10, 20 and 30 cm) were the variables. Among them, water potential and time were the critical factors to influence the survivability of R. solani. Low soil water potential (<-0.51bar) and long time periods (>50 days) decreased the survival rate of the studied pathogen. When soil amended with antagonist Bacillus megaterium 18 or S26 for 24-40 days, the activities of soil microbes increased and the population of R. solani decreased. When the water potential and temperature of loam soil were maintain at -1.37 bar and 35°C, the soil amended with B. megaterium #18 or S26 (1010 cfu/g soil, especially) decreased the population of R. solani significantly. Bacillus megaterium did not affect the growth of lilies adversely. When soil water potential was kept at -1.37 or -0.51 bar, the presence of B. megaterium 18 or S26 protected effectively lilies from the infection with R. solani. |
本系統中英文摘要資訊取自各篇刊載內容。