Latitudinal and longitudinal clines of phenotypic plasticity in the invasive herb Solidago canadensis in China
Latitudinal and longitudinal clines of phenotypic plasticity in the invasive herb Solidago canadensis in China
复制标题
中国入侵草本加拿大一枝黄花表型可塑性的纬向和纵向变化
DOI：
10.1007/s00442-016-3699-x
复制
发表时间：
2016-11-01
期刊：
影响因子：
2.7
通讯作者：
van Kleunen, Mark
中科院分区：
文献类型：
--
作者：
Li, Junmin;Du, Leshan;van Kleunen, Mark
表型可塑性被认为是植物在可变环境中的重要因素。气候变异性假说提出，由于温度变化更大，高纬度地区的人口应该比低纬度地区的人口有更多的塑料对温度的反应。同样，在降水量波动较大的地点，人口应更具可塑性，以应对水的可用性比人口在降水量变化较小的地点。我们采样了7个和9个种群的加拿大一枝黄花，北美本土的入侵在中国，沿着纬度（温度变化）和纵向（降水变化）梯度，分别在中国，并增长他们在两个温度处理和两个水的可用性处理，分别。在4个群体间可塑性对温度响应差异显著的性状中，叶长宽比的可塑性与群体的纬度和温度季节性呈显著正相关。此外，根冠比和水分利用效率表现出明显的群体间可塑性差异，这两个性状的可塑性与经度呈显著负相关，与降水季节性呈正相关。所观察到的可塑性地理渐变表明，S。canadensis可能在气候条件不同的地区迅速进化，这可能有助于这种入侵物种的传播。
Phenotypic plasticity is thought to be important for plants in variable environments. The climatic variability hypothesis poses that populations at higher latitudes, due to the stronger variation in temperature, there should be more plastic in response to temperature than populations at lower latitudes. Similarly, populations at locations with stronger precipitation fluctuations should be more plastic in response to water availability than populations at locations with less variable precipitation. We sampled seven and nine populations of Solidago canadensis, a North American native that is invasive in China, along a latitudinal (temperature variability) and a longitudinal (precipitation variability) gradient, respectively, in China, and grew them under two temperature treatments and two water-availability treatments, respectively. Among the four traits with significant variation in plasticity among populations in response to temperature, plasticity of leaf length-to-width ratio was significantly positively correlated with latitude and temperature seasonality of the populations. In addition, root/shoot ratio and water-use efficiency showed significant variation in plasticity among populations in response to water availability, and plasticities of these two traits were significantly negatively correlated with longitude and positively correlated with precipitation seasonality. The observed geographic clines in plasticity suggest that phenotypic plasticity of S. canadensis may have evolved rapidly in regions with different climatic conditions, and this may have contributed to the spread of this invasive species.