【作者】 何永美； 湛方栋； 陈海燕； 祖艳群； 李元；

【Author】 HE Yong-mei,ZHAN Fang-dong,CHEN Hai-yan,ZU Yan-qun,LI Yuan*(College of Resources and Environment,Yunnan Agricultural University,Kunming 650201,China)

【机构】 云南农业大学资源与环境学院；

【摘要】 采用大田试验方法,研究了模拟紫外辐射(UV-B,280~310 nm)增强对4个割手密无性系不同时期叶片附生真菌数量和优势种群的影响。结果表明:UV-B辐射增强不改变割手密无性系叶片附生真菌的数量在伸长期最大、成熟期次之、分蘖期和幼苗期较少的规律性;UV-B辐射增强减少割手密无性系叶片附生真菌的数量。链格孢菌属和枝孢菌属是4个割手密无性系叶面附生真菌的优势种群,UV-B辐射增强对割手密无性系叶面附生优势种群组成的没有明显影响。更多还原

【Abstract】 Field experiments were conducted to determine effects on the epiphytic fungi quantity of 4 wild sugarcane clones(Saccharum spontaneum L.) with different UV-B sensitivity under an enhanced ultraviolet-B(UV-B,280 nm-310 nm) radiation in different stage.The quantity of epiphytic fungi was the most in elongating stage,second in maturing stage and lest in tillering stage and seedling stage.The sequence wasn’t alternated by UV-B radiation.The epiphytic fungi quantity of 4 wild sugarcane clones was decreased under the enhanced UV-B radiation.Alternaria and Cladosporium was the dominant population of 4 wild sugarcane clones,and the dominant population structure was not affected by UV-B radiation.更多还原