【摘要】 尖孢镰刀菌[FusariumoxysporumSchlf sp vanillaeGordon]是香荚兰根腐病的主要病原菌。本实验从温度、pH值对菌丝生长和孢子萌发的影响,找出孢子致死温度,及光照对菌落生长影响等方面进行研究。实验结果表明尖孢镰刀菌在5～37℃间均能生长,菌丝生长最适温度为28℃;孢子萌发温度范围5～36℃,最适温度为27℃;分生孢子致死温度为58℃(10min),菌丝生长最适pH为6 5,孢子萌发最适pH为4;该实验还表明全光照对菌丝生长有抑制的作用,光暗交替有利于菌丝生长。更多还原

【Abstract】 The root-rot was one of important diseases on Vanilla plants,which was mostly caused by Fusarium oxysporum Schl f.sp.vanillae Gordon.The experiment showed:the hyphae could grow between 5-37 ℃,and the optimum temperature was 28 ℃;the range of temperature for germinating conidia was 5-36 ℃,the optimum temperature was 27 ℃;the lethal temperature for spores was 58 ℃ for 10 minutes.Under the different pH value 2.3-12,the hyphae could grow,and the conidia could germinate,the optimum pH for hyphae growth was 6.5,the optimum pH for conidia germination was 4. The treatment of whole illumination could restrain the growth of mycelium,the alternation of darkness and light could promote mycelium growth.更多还原