期刊名称：African Journal of Environmental Science and Technology
电子版ISSN：1996-0786
出版年度：2013
卷号：7
期号：8
页码：794-798
DOI：10.5897/AJEST2013.1489
语种：English
出版社：Academic Journals
摘要：Dutch elm disease is the most common and destructive disease of the elm family. The pathogen of Ophiostoma novo-ulmi will systematically lead to the blockage of xylems and cavities, and will finally lead to the development of wilt symptoms. The present study aimed to compare the diameter size of vessels and the number of xylary rays in four species: Ulmus carpinifolia, Ulmus glabra, Zelkova carpinifolia and Celtis australis as important factors in host resistance to elm disease. To do this, some samples were randomly collected from 10 cm above the place of seedling’s inoculation. The test results showed that there was a significant difference at 1% probability level among the measured indicators in these four species, the maximum diameter of vessel and the maximum number of xylary rays belonged to U. carpinifolia. According to the results, Ulmus campestris was more sensitive towards Dutch elm disease as compared to the other three species, and C. australis had the greatest resistance to Dutch elm disease.
关键词：Dutch elm disease; xylary rays; vessel; resistance
