Impact of macrophyte Lemna trisulca on the growth rate and synthesis of cylindrospermopsin (CYN) by cyanobacterium Raphidiopsis raciborskii was determined. The presence of L. trisulca inhibited the biomass accumulation of the cyanobacterium by 25% compared to the control during co-cultivation. The simultaneous cultivation of these organisms slightly affected the inhibition of macrophyte growth rate by 5.5% compared to the control. However, no morphological changes of L. trisulca after incubation with cyanobacteria were observed. It was also shown that the long-term (35 days) co-cultivation of R. raciborskii and L. trisulca led to a decrease in CYN concentration in media and cyanobacterial cells by 32 and 38%, respectively, compared to the values obtained for independent cultivation of cyanobacterium. Excessive absorption of phosphate ions by L. trisulca from the medium compared to nitrate ions led to a significant increase in the nitrate:phosphate ratio in the media, which inhibits the development of cyanobacterium. The obtained results indicate that L. trisulca in the natural environment may affect the physiology of cyanobacteria. The presented study is the first assessment of the allelopathic interaction of macrophyte and R. raciborskii.

确定了大型植物Lemna trisulca对蓝藻拟南芥（Raphidiopsis raciborskii）的生长速率和圆柱精子胃蛋白酶（CYN）合成的影响。与共培养期间的对照相比，L。trisulca的存在抑制了蓝细菌的生物量积累25％。与对照相比，这些生物的同时培养对大植物生长速度的抑制略有影响，为5.5％。然而，在与蓝细菌一起孵育后，未观察到L. trisulca的形态变化。还显示了R. raciborskii和L. trisulca的长期（35天）共培养与独立培养蓝藻所获得的值相比，培养基和蓝藻细胞中的CYN浓度分别降低了32％和38％。与硝酸根离子相比，Trisulca从培养基中过量吸收磷酸根离子导致培养基中硝酸根：磷酸根比率的显着增加，这抑制了蓝细菌的发育。获得的结果表明，自然环境中的Trisulca可能会影响蓝细菌的生理。提出的研究是大型植物与R. raciborskii的化感作用的首次评估。