Plant invasion alters latitudinal pattern of plant-defense syndromes
Plant invasion alters latitudinal pattern of plant-defense syndromes
复制标题
植物入侵改变植物防御综合征的纬度模式
DOI：
10.1002/ecy.3511
复制
发表时间：
2021-08-27
期刊：
影响因子：
4.8
通讯作者：
Li, Bo
中科院分区：
文献类型：
--
作者：
Liu, Mu;Pan, Yuanfei;Li, Bo
草食动物和纬度之间的关系可能会有所不同的本地和引进的入侵植物种群，这可能会产生纬度异质性的敌人释放的强度。然而，仍然知之甚少的纬度异质性的植食压力如何影响纬度变化的防御表型的入侵植物。我们测试了纬度模式的多变量防御综合征之间的本地（阿根廷）和引进（中国）的入侵性草本植物空心莲子草种群的不同。此外，为了更好地了解纬度模式的驱动因素，我们还测试了防御综合征与气候和草食动物的关联是否在本地和引进范围之间存在差异。我们发现，本地植物种群聚类成三个主要的防御综合征与纬度。相比之下，我们只发现了两个防御综合征在介绍的范围。一个匹配的高纬度综合征从本地的范围，但分布在北方和南方的范围限制在引进的范围。另一个是独特的引进范围和发生在中纬度地区。气候条件与变异的综合征在本地范围内，气候条件和草食动物与变异的综合征在引进的范围内。总之，我们的研究结果表明，植物可能在新的环境条件下，在引进的范围内显示防御综合征的纬度模式，是不同于那些在他们的原生范围。这表明，在研究入侵植物防御机制的进化时，应明确考虑种群分化的地理依赖性。
The relationship between herbivory and latitude may differ between native and introduced populations of invasive plants, which can generate latitudinal heterogeneity in the strength of enemy release. However, still little is known about how latitudinal heterogeneity in herbivore pressure influences latitudinal variation in defense phenotypes of invasive plants. We tested how latitudinal patterns in multi-variate defense syndromes differed between native (Argentinian) and introduced (Chinese) populations of the invasive herb Alternanthera philoxeroides. In addition, to better understand the drivers underlying latitudinal patterns, we also tested whether associations of defense syndromes with climate and herbivory differed between native and introduced ranges. We found that native plant populations clustered into three main defense syndromes associated with latitude. In contrast, we only found two defense syndromes in the introduced range. One matched the high-latitude syndrome from the native range, but was distributed at both the northern and southern range limits in the introduced range. The other was unique to the introduced range and occurred at mid-latitudes. Climatic conditions were associated with variation in syndromes in the native range, and climatic conditions and herbivory were associated with variation in syndromes in the introduced range. Together, our results demonstrate that plants may under the new environmental conditions in the introduced range show latitudinal patterns of defense syndromes that are different from those in their native range. This emphasizes that geographical dependence of population differentiation should be explicitly considered in studies on the evolution of defense in invasive plants.