Pelella Emanuele, Questino Beatrice, Ceschin Simona
Department of Sciences, University of Roma Tre, Viale G. Marconi 446, 00146 Rome, Italy.
NBFC-National Biodiversity Future Center, 90133 Palermo, Italy.
Plants (Basel). 2023 Feb 10;12(4):811. doi: 10.3390/plants12040811.
is an alien aquatic plant considered highly invasive in Europe since it alters freshwater habitats by forming dense mats both in water and along banks, outcompeting natives. effects on the native carnivorous plant were investigated here. A 21-day indoor experiment was performed by setting up some separate tests in which was made to grow both alone (control tests) and together with (arena tests). Water chemical and physical parameters and growth and morphological traits of and were analysed weekly. Water samples were also analysed by UV-visible spectra to verify allelochemical (quercitrin) production by . In arena tests, oxygen concentration and pH were lower and conductivity higher than in control tests. grew significantly less in arena tests in both shoot length and internode number, and its fresh weight, trap number and internode length decreased more than the control. Quercitrin was found only in arena tests as an allelochemical product released by . Overall, this study demonstrated significantly alters water parameters and negatively affects the growth of , showing aggressive and competitive behaviour against this native species. Such evidence suggest that the widespread of can represent a serious threat to the conservation of native plant diversity occurring in the freshwater habitats it invades.
是一种外来水生植物，在欧洲被认为具有高度入侵性，因为它通过在水中和沿岸形成密集的草垫改变淡水栖息地，从而胜过本地物种。在此研究了其对本地食肉植物的影响。通过设置一些单独的试验进行了一项为期21天的室内实验，在这些试验中，使其单独生长（对照试验）以及与一起生长（竞争试验）。每周分析水的化学和物理参数以及和的生长和形态特征。还通过紫外可见光谱分析水样，以验证产生化感物质（槲皮苷）的情况。在竞争试验中，氧气浓度和pH值低于对照试验，电导率则更高。在竞争试验中，的茎长和节数显著减少，其鲜重、捕虫器数量和节间长度的减少幅度大于对照。仅在竞争试验中发现槲皮苷是释放的一种化感物质产物。总体而言，本研究表明显著改变了水参数，并对的生长产生负面影响，显示出对这种本地物种的侵略性和竞争性行为。此类证据表明，的广泛分布可能对其入侵的淡水栖息地中本地植物多样性的保护构成严重威胁。
