| 摘要: |
| 电镜观察结果表明，三唑酮引起胶锈菌发生了一系列变化。病菌单核菌丝和吸器内液泡明显增加，菌丝壁和吸器壁不规则地加厚，菌丝隔膜发育受阻而不能形成完整的隔膜，吸器外间质变宽并充满染色较深的物质，部分吸器发育受阻而使吸器畸形，大量染色较深的物质在性孢子梗顶瑞沉积，使得孢子梗失去产孢能力。病菌以上细胞学变化可能导致了病菌的进一步发育受阻。 |
| 关键词: 胶锈菌，单核，超微结构，三唑酮，内吸杀菌剂，药剂防治，贴梗海棠 |
| DOI： |
| 分类号:S482.2 |
| 基金项目:国家教委资助优秀年轻教师基金项目 |
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| Effects of Triadimefon on the Development of Gymnosporangium haraeanum in Chaenomeles speciosa |
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Huang Lili Kang Zhengsheng Wei Guorong Yang Cuixia
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| Abstract: |
| The effects of systemic fungicide Triadimenfon on the development of Gmnosporangium haraeanum in Chaenomeles speciosa were examined with electron microscope. The results from observation showed that Triadimenfon caused a series of changes in the fungal cell. The vacules in cytoplasm of hyphae with single nucleus and of haustoria increased markedl,and the walls of the hyphae and the haustoria were thickened irregularly. The hyphae septum development was inhibited and became imperfect.The extrahaustorial matrix was found to be enlarged and contained some electron-dense materials. Some of haustoria did not expand normaly and became malforme.Furthermore , pycniosporphores lost thier ability of producing pycniospores because numerous electorn-dense materials were deposited at the top of the pycniosporophores.The cytological changes in the pathogen above may have led to the inhibition of further development of this pathogen. |
| Key words: Gymnosporangium haraeanum,monodaryon, Ultrastructure,Triadimefon,systemic fungicide,chemical control,Chaenomeles speciosa |
