Salt-tolerant native plants have greater responses to other environments when compared to salt-tolerant invasive plants
Salt-tolerant native plants have greater responses to other environments when compared to salt-tolerant invasive plants
复制标题
与耐盐入侵植物相比，耐盐本土植物对其他环境的反应更大
DOI：
10.1002/ece3.5368
复制
发表时间：
2019
影响因子：
2.6
通讯作者：
Peng Shaolin
中科院分区：
文献类型：
--
作者：
Liu Muxin;Liao Huixuan;Peng Shaolin
入侵植物强大的扩张潜力通常归因于对压力的快速适应性反应。然而，对一种压力源的耐受性的演变可能会影响对其他压力源的反应。目前，尚不清楚一种压力源的进化可能会对其他单一或组合压力源的反应产生什么影响。此外，尚不清楚入侵物种和本地物种之间有何不同。来自低盐度和高盐度栖息地的入侵植物（薇甘菊和鬼针草）和本地植物（紫花苜蓿和Sida acuta）是在控制和压力条件下生长的[盐胁迫、水分胁迫（干旱/涝渍）及其组合]。我们探讨了进化的耐盐性对水胁迫/综合胁迫反应的影响以及潜在的性状机制。所有物种的高盐度种群都比低盐度种群表现出更强的耐盐性。在对其他胁迫的耐受性方面，入侵物种的高盐度和低盐度种群相似，而本地物种的高盐度种群在大多数胁迫处理下表现出比低盐度种群更强的耐受性。然而，在对照条件下，本地物种耐盐性的增强伴随着总生物量的减少。本地物种的胁迫耐受性与叶片生产速率和根分配相关，而本地物种在对照条件下的表现与叶片形态和碳同化率相关。这表明本地物种而非入侵物种的耐盐性和性能之间存在权衡，这可能是由于表型/生理特征的改变所致。综合我们的工作表明，与入侵物种相比，对一种压力源的耐受性的进化可能对本地物种对其他压力源的耐受性产生更强的影响。这可能是解释在高压力栖息地中入侵物种与本地物种相比的更大优势的新范例。
The strong expansion potential of invasive plants is often attributed to fast adaptive responses to stress. However, the evolution of tolerance to one stressor may affect the responses to other stressors. Currently, it remains unclear what effect the evolution to one stressor might have on the responses to other single or combined stressors. Moreover, it is unknown how this might differ between invasive and native species.Invasive plants (Mikania micranthaandBidens pilosa) and native plants (Merremia hederaceaandSida acuta) from low‐ and high‐salinity habitats were grown under control and stressful conditions [salt stress, water stress (drought/waterlogging), and their combinations]. We explored the effects of evolved salt tolerance on the responses to water stress/combined stresses and the underlying trait mechanisms.The high‐salinity populations of all species exhibited stronger salt tolerance than the low‐salinity populations. As to the tolerance to other stressors, the high‐salinity and low‐salinity populations of the invasive species were similar, whereas the high‐salinity populations of the native species exhibited stronger tolerance than the low‐salinity populations under most stress treatments. However, the enhanced salt tolerance in native species was accompanied by reduced total biomass under control condition. The stress tolerance of native species correlated with leaf production rate and allocation to root, while the performance of native species under control condition correlated with leaf morphology and carbon assimilation rate. This suggests a trade‐off between salt tolerance and performance in the native but not the invasive species, probably resulting from altered phenotypic/physiological traits.SynthesisOur work suggests that the evolution of tolerance to one stressor may have stronger effects on the tolerance to other stressors of the native compared with the invasive species. This may be a new paradigm to explain the greater advantage of invasive vs. native species in highly stressful habitats.