Soil biota drive expression of genetic variation and development of population-specific feedbacks in an invasive plant
Soil biota drive expression of genetic variation and development of population-specific feedbacks in an invasive plant
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DOI：
10.1890/10-1370.1
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发表时间：
2011-06-01
期刊：
影响因子：
4.8
通讯作者：
Schweitzer, Jennifer A.
中科院分区：
文献类型：
--
作者：
Felker-Quinn, Emmi;Bailey, Joseph K.;Schweitzer, Jennifer A.
入侵植物物种改变土壤的方式可能会影响后代的成功，创造植物-土壤反馈。臭椿（Ailanthus altissima）是两个世纪前引入北美的一种入侵树木。我们假设地理上不同的A. altissima已经建立了反馈特定于他们的当地环境，由于土壤群落栽培的A。很高。我们从美国东部的三个种群中收集种子和土壤，并在温室中将所有家庭种植在所有收集的土壤中，以及在对照混合土壤中，以及在经过辐照灭菌的土壤中。两个种群在野外采集的土壤中均表现出正的植物-土壤反馈，而第三种群表现出强烈的负反馈。在灭菌的种群土壤中，没有种群水平的表现差异或反馈，支持反馈的土壤生物学基础和遗传分化的表达。很高。如果臭椿种群在不同的程度上，他们受益于这些植物-土壤生物群的反馈，并促进这些植物-土壤生物群的反馈，入侵者和入侵的社区之间的相互作用可能是更重要的，在确定入侵的过程中比任何一个单独的特征。
Invasive plant species alter soils in ways that may affect the success of subsequent generations, creating plant-soil feedbacks. Ailanthus altissima is an invasive tree introduced two centuries ago to North America. We hypothesized that geographically distinct populations of A. altissima have established feedbacks specific to their local environment, due to soil communities cultivated by A. altissima. We collected seeds and soils from three populations in the eastern United States, and in the greenhouse reciprocally planted all families in all collected soils as well as in a control mixed soil, and in soils that had been irradiated for sterilization. There were positive plant-soil feedbacks for two populations in the live field-collected soils, but strong negative feedbacks for the third population. There were no population-level performance differences or feedbacks in the sterilized population locale soils, supporting a soil biotic basis for feedbacks and for the expression of genetic differentiation in A. altissima. If populations of Ailanthus altissima vary in the extent to which they benefit from and promote these plant-soil biota feedbacks, the interaction between invader and invaded community may be more important in determining the course of invasion than are the characteristics of either alone.