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中国农学通报

中国农学通报 ›› 2009, Vol. 25 ›› Issue (9): 220-223.

所属专题： 小麦； 水稻

• 植物保护 农药 • 上一篇    下一篇

麦冬块根提取物对稻瘟病菌丝及苗期稻瘟病发生的抑制效果

林冬枝,董彦君,续荣治   

  • 收稿日期:2008-12-26 修回日期:2009-01-29 出版日期:2009-05-05 发布日期:2009-05-05

Inhibitory effects of extracts from dwarf lilyturf (Ophiopogon japonicus K.) roots on rice blast fungus and rice blast disease at seedling stage

  • Received:2008-12-26 Revised:2009-01-29 Online:2009-05-05 Published:2009-05-05

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摘要： 采用不同浓度来自70%甲醇溶液的麦冬块根提取物对2种产自日本的稻瘟病菌生理小种菌株MAFF305480和MAFF101002的菌丝生长及其接种诱发水稻幼苗稻瘟病发生的抑制效果进行评价。试验表明：含有麦冬块根提取物的原液1/10，1/20，1/40以及1/80浓度都能明显抑制稻瘟病菌小种菌株(MAFF305480和MAFF101002)菌丝生长, 抑制率均56.4%以上, 对接种诱发稻瘟病的水稻幼苗处理发现, 幼苗植株发病级数为明显下降, 抑制率均38.4%以上, 并且都随着处理浓度提高抑制效果明显提高。本研究结果表明，麦冬块根提取物中含有抑制稻瘟病菌生长的化学物质, 并且能直接抑制稻瘟病菌发生和生长。

关键词: 叶绿体, 叶绿体, 发育, 光照

Abstract: This study was carried out to evaluate the inhibitory effects of 70% methanol extracts from dwarf lilyturf (Ophiopogon japonicus K.) roots on two isolates (MAFF305480和MAFF101002) of rice blast fungus (Magnaporthegrisea) from Japan and rice blast disease at seedling stage. The results indicated all extracts from dwarf lilyturf (Ophiopogon japonicus K.) roots with 1/10，1/20，1/40 and 1/80 original solution significantly inhibited both the mycelial growth of the two isolates(MAFF305480 and MAFF101002) by over 56.4% and the degrees of rice blast disease, induced by inoculation of the two isolates, in rice seedlings by over 38.4% and their inhibitory effects become strong along with the higher concentration, which suggest that the extracts from the dwarf lilyturf roots contained inhibitory chemicals for growth of rice blast fungus and even directly inhibited the occurrence and development of rice blast disease in rice seedlings.