Genetically Based Trait Differentiation but Lack of Trade-offs between Stress Tolerance and Performance in Introduced Canada Thistle  

作　　者：Kathryn A.Hodgins Alessia Guggisberg Kristin Nurkowski Loren H.Rieseberg 

机构地区：[1]School of Biological Sciences,Monash University,Melbourne,VIC,Australia [2]Department of Botany and Biodiversity Research Centre,University of British Columbia,Vancouver,BC,Canada [3]Department of Environmental Systems Science,ETH Zurich,Zurich,Switzerland [4]These authors contributed equally to this article

出　　处：《Plant Communications》2020年第6期112-123,共12页植物通讯（英文）

基　　金：supported by grants(PBZHP3-123301 and PA00P3_134180)from the Swiss National Science Foundation to A.G.;from the Natural Sciences and Engineering Research Council of Canada Awards(327475 and 353026)to L.H.R.

摘　　要：Trade-offs between performance and tolerance of abiotic and biotic stress have been proposed to explain both the success of invasive species and frequently observed size differences between native and introduced populations.Canada thistle seeds collected from across the introduced North American and the native European range were grown in benign and stressful conditions(nutrient stress,shading,simulated herbivory,drought,and mowing),to evaluate whether native and introduced individuals differ in performance or stress tolerance.An additional experiment assessed the strength of maternal effects by comparing plants derived from field-collected seeds with those derived from clones grown in the glasshouse.Introduced populations tended to be larger in size,but no trade-off of stress tolerance with performance was detected;introduced populations had either superior performance or equivalent trait values and survivorship in the treatment common gardens.We also detected evidence of parallel latitudinal clines of some traits in both the native and introduced ranges and associations with climate variables in some treatments,consistent with recent climate adaptation within the introduced range.Our results are consistent with rapid adaptation of introduced populations,but,contrary to predictions,the evolution of invasive traits did not come at the cost of reduced stress tolerance.

关 键 词：biological invasion EICA adaptation trait evolution PLASTICITY Canada thistle 

分 类 号：Q94[生物学—植物学]