Enhanced allelopathy and competitive ability of invasive plant Solidago canadensis in its introduced

Journal of Plant Ecology (Impact Factor: 2.65). 06/2012; 6(3). DOI: 10.1093/jpe/rts033


Allelochemical contents (total phenolics, total flavones and total saponins) and allelopathic effects were greater in S. canadensis sampled from China than those from the USA as demonstrated in a field survey and a common garden experiment. Inhibition of K. striata germination using S. canadensis extracts or previously grown in soil was greater using samples from China than from the USA. The competitive ability of S. canadensis against K. striata was also greater for plants originating from China than those from the USA. Allelopathy could explain about 46% of the difference. These findings demonstrated that S. canadensis has evolved to be more allelopathic and competitive in the introduced range and that allelopathy significantly contributes to increased competitiveness for this invasive species.

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    • "Determining the mechanisms underlying successful range expansions and rapid adaptive processes including genetic factors, environmental factors, or their interactions is a critical challenge. Closely related Solidago species exhibit latitudinal variation in phenology (Weber and Schmid 1998) and enhanced competitive ability (Yuan et al. 2013) in the invaded range. Our previous study on S. altissima in Japan showed that plant resistance was rapidly selected when it was re-associated with a recently invaded herbivorous insect, Corythucha marmorata from North America (Sakata et al. 2014). "
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    ABSTRACT: Understanding the origins and diversity of invasive species can reveal introduction and invasion pathways, and inform an effective management of invasive species. Tall goldenrod, Solidago altissima, is a herbaceous perennial plant native to North America and it has become a widespread invasive weed in East Asian countries. We used microsatellite and chloroplast DNA markers to obtain information on neutral processes and on genetic diversity in native and invaded populations of S. altissima and to infer how it invaded and spread in Japan. We found that introduced (n = 12) and native (n = 20) populations had similar levels of genetic diversity at nuclear SSR loci. Genetic structure analysis indicated that at least two independent colonization events gave rise to current S. altissima populations in Japan. The majority (68 %) of the Japanese S. altissima were genetically similar and likely shared a common origin from a single or a small number of populations from the southern USA populations, while the populations in Hokkaido were suggested to arise from a different source. Our results suggest that multiple and mass introductions have contributed to the persistence and rapid adaptation of S. altissima promoting its widespread establishment throughout Japan.
    Journal of Plant Research 10/2015; DOI:10.1007/s10265-015-0753-4 · 1.82 Impact Factor
    • "Solidago has been reported to have allelopathic effects that inhibit the germination and growth of species native to Europe (Abhilasha et al. 2008) and species native to China (Sun et al. 2006), where Solidago is also invasive. Also, Yuan et al. (2013) found that Solidago from China had a greater impact via allelopathy on Kummerowia striata, a native to China, than Solidago from North America. Overall, much is still unknown about differences in the performace of exotic invasive plant species between their native and non-native ranges. "
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    ABSTRACT: We have yet to adequately quantify the impacts of invaders in their non-native ranges relative to their native ranges. Such biogeographical comparisons are crucial to better understand the role of invasive species in plant–plant interactions and in the evolution of community organization. Using Solidago canadensis, we conducted field surveys in the native range (North America) and non-native range (Europe) and correlated stem density and aboveground biomass of Solidago with associated plant species richness and diversity indices. We also conducted experiments to compare the competitive and allelopathic impact of Solidago on the growth of species from its native and non-native ranges. In the field, increasing stem density and biomass of Solidago correlated with more significant decreases in total species richness and two diversity indices in Europe than in North America. Solidago strongly suppressed both European species and North American species in competition experiments, but this competitive effect did not differ between species from the different ranges. However, root extracts from Solidago strongly suppressed the root growth of European species as a group, but not North American species as a group. Our results indicate that the biogeographic origin of species can have important effects on plant interactions and community organization.
    Plant Ecology 08/2015; DOI:10.1007/s11258-015-0508-2 · 1.46 Impact Factor
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    • "The allelopathic response of invasive plants can differ between native and invasive ranges with greater allelopathic effects observed in the invasive range. Yuan et al. (2013) observed increased allelochemical content (total phenolics, total flavones, and total saponins) for Solidago canadensis, a native of the US that has developed invasive populations in China. The increased production of allelopathic chemicals by S. canadensis in the invasive range also coincided with a greater inhibition of native plant seedlings. "
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    ABSTRACT: Plants in terrestrial systems have evolved in direct association with microbes functioning as both agonists and antagonists of plant fitness and adaptability. As such, investigations that segregate plants and microbes provide only a limited scope of the biotic interactions that dictate plant community structure and composition in natural systems. Invasive plants provide an excellent working model to compare and contrast the effects of microbial communities associated with natural plant populations on plant fitness, adaptation, and fecundity. The last decade of DNA sequencing technology advancements opened the door to microbial community analysis, which has led to an increased awareness of the importance of an organism's microbiome and the disease states associated with microbiome shifts. Employing microbiome analysis to study the symbiotic networks associated with invasive plants will help us to understand what microorganisms contribute to plant fitness in natural systems, how different soil microbial communities impact plant fitness and adaptability, specificity of host-microbe interactions in natural plant populations, and the selective pressures that dictate the structure of above-ground and below-ground biotic communities. This review discusses recent advances in invasive plant biology that have resulted from microbiome analyses as well as the microbial factors that direct plant fitness and adaptability in natural systems.
    Frontiers in Microbiology 07/2014; 5:368. DOI:10.3389/fmicb.2014.00368 · 3.99 Impact Factor
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