Brasseur Solène, Santonja Mathieu, Rébufa Catherine, Affre Laurence, Dupouyet Sylvie, Dumas Estelle, Tatoni Thierry, Farnet Da Silva Anne-Marie, Bousquet-Mélou Anne
Aix Marseille Univ, CNRS, Avignon Univ, IRD, IMBE Marseille France.
Ecol Evol. 2024 Jun 25;14(6):e11499. doi: 10.1002/ece3.11499. eCollection 2024 Jun.
Beyond ecological and health impacts, invasive alien plant species can generate indirect and direct costs, notably through reduced agricultural yields, restoration, and management of the invaded environment. and are invasive plant species that cause particularly significant damage to the railway network in the Mediterranean area. The allelopathic properties of Mediterranean plant species could be used as nature-based solutions to slow down the spread of such invasive plant species along railway borders. In this context, a mesocosm experiment was set-up: (i) to test the potential allelopathic effects of , , and leaf aqueous extracts on seed germination and seedling growth of and ; (ii) to evaluate whether these effects depend on the extract dose; and finally, (iii) to estimate whether these effects are modified by soil amendment. Leaf aqueous extracts of the three native plant species showed negative effects on both seed germination and seedling growth of the two invasive species. Our results show that the presence of allelochemicals induces a delay in seed germination (, germination lasted up to 269% longer in the presence of high-dose leaf aqueous extracts of ), which can lead to a decrease in individual recruitment. They also highlight a decrease in seedling growth (, high-dose leaf aqueous extracts induced a 26% decrease in radicle growth), which can alter the competitiveness of invasive species for resource access. Our results also highlight that compost addition limits the inhibitory effect of native Mediterranean plants on the germination of invasive alien plants, suggesting that soil organic matter content can counteract allelopathic effects on invasive alien plants. Thus, our findings revealed that the allelopathic potential of certain Mediterranean plant species could be a useful tool to manage invasive plant species.
除了对生态和健康产生影响外，外来入侵植物物种还会产生间接和直接成本，特别是通过降低农业产量、对入侵环境进行恢复和管理。[两种植物名称]是对地中海地区铁路网络造成特别严重破坏的入侵植物物种。地中海植物物种的化感特性可作为基于自然的解决方案，以减缓此类入侵植物物种沿铁路边界的扩散。在此背景下，开展了一项中型生态系统实验：（i）测试[三种植物名称]叶片水提取物对[两种入侵植物名称]种子萌发和幼苗生长的潜在化感作用；（ii）评估这些作用是否取决于提取物剂量；最后，（iii）估计这些作用是否会因土壤改良而改变。三种本土植物物种的叶片水提取物对两种入侵物种的种子萌发和幼苗生长均显示出负面影响。我们的结果表明，化感物质的存在会导致种子萌发延迟（例如，在高剂量[植物名称]叶片水提取物存在的情况下，[入侵植物名称]的萌发持续时间延长了269%），这可能导致个体补充数量减少。它们还突出显示了幼苗生长的下降（例如，高剂量[植物名称]叶片水提取物导致[入侵植物名称]胚根生长下降了26%），这可能会改变入侵物种获取资源的竞争力。我们的结果还突出表明，添加堆肥会限制地中海本土植物对外来入侵植物萌发的抑制作用，这表明土壤有机质含量可以抵消对外来入侵植物的化感作用。因此，我们的研究结果表明，某些地中海植物物种的化感潜力可能是管理入侵植物物种的有用工具。
