A cross-city molecular biogeographic investigation of arbuscular mycorrhizas in Conyza canadensis rhizosphere across native and non-native regions

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• 作者：Manzoor A Shah (1)
  Marie-Eve Beaulieu (2)
  Zafar A Reshi (1)
  Salman Qureshi (3)
  Damase P Khasa (2)
  
  1. Department of Botany ; University of Kashmir ; Srinagar-190 006 ; Jammu and Kashmir ; India
  2. Canadian Research Chair in Forest and Environmental Genomics and Institute of Integrative and Systems Biology ; Pavillon Marchand ; Universit茅 laval ; Qu茅bec ; G1V 0A6 ; Canada
  3. Department of Geography (Landscape Ecology) ; Humboldt University of Berlin ; Rudower Chaussee 16 ; 12489 ; Berlin ; Germany
  
• 关键词：Mycorrhizal symbiosis ; Conyza canadensis ; Evolution ; Kashmir Himalaya ; North America ; Plant invasion ; Urbanization
• 刊名：Ecological Processes
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：4
• 期：1
• 全文大小：616 KB
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• 刊物主题：Environment, general;
• 出版者：Springer Berlin Heidelberg
• ISSN：2192-1709

文摘

Introduction The ecological processes underlying the suppressive impacts of invasive species on native species diversity, both above- and below-ground, in non-native regions are not well understood. We therefore aimed to investigate the cross-city biogeographic patterns of arbuscular mycorrhizal (AM) diversity in Conyza canadensis rhizosphere in native (North American) and non-native (Kashmir Himalayan) regions. Methods We recovered AMF spores from rhizospheric soils of Conyza in native and non-native ranges, besides doing so from the uninvaded sites in the introduced region. DNA extracted from AMF spores was processed for cloning and PCR-RFLP of SSU rRNA gene to yield the restriction groups (RGs) followed by their sequence analysis to determine the sequence groups (SGs). Results The results indicated greater diversity of RGs and SGs in Conyza rhizosphere in native than in non-native sites. In the introduced region, however, the AMF diversity was more in uninvaded than in invaded sites. The species composition of AMF varied significantly between native and non-native regions and so also between invaded and uninvaded habitats. Conclusions Though difference in AMF diversity between Conyza invaded and uninvaded sites may be attributed to invasion, the role of other evolutionary factors seems likely for differences between the native and non-native regions. We suggest that the ecological processes underlying these evolutionary differences in two biogeographic regions, besides the intensity of urbanization, might play some role in these differences.