欧美杨新型溃疡病病株与健株干部树皮中真、细菌优势种群分析
Analysis on Dominant Population of Fungus and Bacteria from Healthy and Canker Disease-Infected Populus×euroamericana Bark
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摘要: 为探讨感染欧美杨新型溃疡病的中林46杨植株干部病斑中真、细菌优势种类,本研究对河南省濮阳市中林46杨健株、病株染病组织的可培养真菌、细菌优势种群进行了分析。结果表明:健康树皮样品分离真菌优势种群均为Alternaria alternata,染病株样品优势种群均为Fusarium solani,而且其菌株数量占所分离菌株总数的百分比均在85%以上;而在健康株3个处理中分离的细菌优势种群种类不同,仅Microbacterium在健株3个处理树皮样品中均有分布,但染病株3个处理树皮样品中的细菌优势种群均为Lonsdalea quercina,其菌株数量占所分离菌株总数的百分比均在67%以上。以上结果表明:中林46杨发病以后,F.solani和L. quercina分别变成了真菌和细菌的优势种群。Abstract: To explore species changes of dominant population of fungi and bacteria from healthy and canker disease-infected Populus× euroamericana, the cultivable bacteria and fungi from healthy and diseased poplar bark in Puyang city were isolated. The results show that the dominant species of fungi from healthy and diseased poplar bark are Alternaria alternata and Fusarium solani respectively, and the strains number of F. solani from diseased poplar bark are more than 85% of all the fungal isolates. And the bacterial dominant species of diseased poplar plants bark is Lonsdalea quercina, and the strains number of which are more than 67% of the all bacterial isolates, while the preponderant species of three healthy poplar bark samples are different. F. solani and L. quercina became the preponderant species in cankers of Populus×euroamericana.
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Key words:
- Populus×euroamericana
- / canker disease
- / 16S rRNA
- / dominant population
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