Diversity and zonal distribution of arbuscular my-corrhizal fungi on the northern slopes of the Tian

来源 :Science in China(Series D:Earth Sciences) | 被引量 : 0次 | 上传用户:apenggejiayou
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The arbuscular mycorrhizal (AM) fungal status of the 20 most common plant species distributed in 4 vegetation types (meadow steppe, desert steppe, steppe desert and typical desert) on the northern slopes of the Tianshan Mountains was investigated. Samples of the plant species and their rhizosphere soils were collected from the 4 vegetation zones and examined to compare their mycorrhizal status, AM fungal spore densities, biovolumes, and community structures. 28 AM fungal species were isolated from the rhizosphere soils: of these, 5 belonged to Acaulospora, 1 to Archaeospora and 22 to Glomus. 5 AM fungi, Glomus aggregatum, G. claroideum, G. deserticola, G. etunicatum and G. sinuosum, were observed in all 4 zonal types. No significant differences were observed in mean proportion of root length colonized by AM fungi among the plant species within each zonal type. Comparing the 4 zonal types, Plantago minuta (84.5%) in steppe desert and Eremopyrum orientale (83.1%) in typical desert showed the highest root colonizatsion rates. AM fungal spore densities and biovolumes were significantly different in the different zonal types. AM fungal spore densities and biovolumes, species richness and diversity were highest in meadow steppe and lowest in typical desert. The arbuscular mycorrhizal (AM) fungal status of the 20 most common plant species distributed in 4 vegetation types (meadow steppe, desert steppe, steppe desert and typical desert) was on the northern slopes of the Tianshan Mountains was investigated. Samples of the plant species and their rhizosphere soils were collected from the 4 vegetation zones and examined to compare their mycorrhizal status, AM fungal spore densities, biovolumes, and community structures. 28 AM fungal species were isolated from the rhizosphere soils: of these, 5 belonged to Acaulospora, 1 to Archaeospora and 22 to Glomus. 5 AM fungi, Glomus aggregatum, G. claroideum, G. deserticola, G. etunicatum and G. sinuosum, were observed in all 4 zonal types. No significant differences were observed in mean proportion of root length colonized by AM fungi among the plant species within each zonal type. Comparing the 4 zonal types, Plantago minuta (84.5%) in steppe desert and Eremopyrum orientale (83.1%) in typical desert showed the highest root colonizatsion rates. AM fungal spore densities and biovolumes were significantly different in the different zonal types. AM fungal spore densities and biovolumes, species richness and diversity were highest in meadow steppe and lowest in typical desert.
其他文献
一段时间以来,我们幼儿园在实施园本课程的同时,将现代信息技术手段应用到幼儿教育教学活动中,取得一定成效。一、教学活动中,信息技术手段的合理应用我园把信息技术与课程的
据报道 随着股东们决定为矿床的开发注入新的资金 ,澳大利亚受阻的中西部钢铁项目有望复苏。在这个项目背景下诞生的Kingstream钢公司却未能筹集足够的资金来实现它的雄心计
Many modern control applications are interdisciplinary in nature. Variety of disciplines are oriented on application of control theory and modeling of mechanica
如果我们不过分执着于“原乡书写”及与之相关的“原乡”所指称的范畴,一定要是未经现代文明开化的乡野(如鲁迅的未庄和许杰的浙东农村,甚或沈从文的湘西等中国现代文学史上
Reliable information about soil conservation capacities of different natural ecosystems is an important reference for the design of targeted erosion and sedimen
一一kffrtt0A-57fill”;,)”g一人℃卜无比,小~一则:川V大厦下一一回回回回回回回回回回回回回回回回甲钱江大厦A煤炭大厦回回回回回口回回回回回回回回回回回回回回到水运交通
今年以来,中国铝业河南分公司不断优化人力资源管理,加大员工的教育培训力度,开展全方位、多层次的员工培训。 在去年公司已经开办了1期中层管理者培训班,41名中层管理者接
一、考查名词性从句的语序及时态名词性从句的语序一般应使用陈述语序,其时态要根据从句动作发生的时间与主句的时态选择相应的时态。 First, to examine the nomenclature
音乐是美国黑人民间文化的主要艺术形式,美国黑人女作家托妮·莫里森将黑人音乐元素引入文学创作中,在其创作的历史三部曲《宠儿》《爵士乐》和《天堂》中,借用黑人音乐的表
本文通过对试制的复合活化混凝土掺合料进行试验研究,结果表明:该掺合料最佳水胶比为0.42,取代水泥最佳比例为30%。其新拌混凝土缓凝时间较长,坍落度损失小,具有混凝土所要求