【摘要】 研究了 12种金属离子对水稻纹枯病菌菌丝生长和菌核形成的影响 ,按其对菌丝生长和菌核形成有抑制作用的浓度范围不同分为 3类 :(1)对病菌有抑制作用的浓度最高 ,在 2 5 0 0 μg/mL时 ,仍有菌丝生长和菌核形成 ,属于这一类的有Mg2 + 、Ba2 + 、Ca2 + 和Mn2 + 4种金属离子 ;值得一提的是 ,Mg2 + 在 10 0～ 2 5 0 0 μg/mL范围内促进菌丝生长和增加菌核干质量 .(2 )对病菌有抑制作用的浓度较高 ,在 5 0 0或 10 0 0 μg/mL时可严重抑制菌丝生长和菌核形成 ,属于这一类的有Fe2 + 、Fe3 + 、Cu2 + 、Pb2 + 和Zn2 + 5种金属离子 .(3)在浓度为 10或 5 0 μg/mL时严重抑制菌丝生长和菌核形成 ,属于这一类的有Ag+ 、Hg2 + 和Cd2 + 3种金属离子更多还原

【Abstract】 The effects of twelve metal ions on mycelial growth and sclerotial formation of Rhizoctonia solani AG 1 IA were studied. According to the concentration affecting mycelial growth and sclerotial formation, these twelve metal ions could be divided into three groups: (1) The inhibiting concentration is the highest. There was still a little mycelial growth and sclerotial formation at 2 500 μg/mL. Mg 2+ , Ba 2+ , Ca 2+ and Mn 2+ belong to this group. Worthy of mention is that Mg 2+ promoted mycelial growth and increased the dry mass of mycelia at the concentrations of 100～2 500 μg/mL. (2) The inhibiting concentration is higher. When the concentration is 500 or 1 000 μg/mL, mycelial growth and sclerotial formation were significantly inhibited. Fe 2+ , Fe 3+ , Cu 2+ , Pb 2+ and Zn 2+ belong to this group. (3) When the concentration is 10 or 50 μg/mL, mycelial growth and sclerotial formation were significantly inhibited. Ag 2+ , Hg 2+ and Cd 2+ belong to this group.更多还原