The off-flavor compound 2-methylisoborneol (2-MIB) is generally associated with the proliferation and metabolism of filamentous cyanobacteria in shallow freshwater ecosystems. Here field monitoring in East Taihu Lake from July to October 2021, along with cultural experiments, was conducted to determine the impact of submerged macrophytes on the growth and 2-MIB production of filamentous cyanobacteria. Pseudanabaena sp. was identified as the 2-MIB producer with the highest detection rate (100%) and correlation coefficient (R=0.68, p < 0.001). The 2-MIB concentration and algal growth in the macrophyte-dominated zones were markedly decreased compared with those in the phytoplankton-dominated zone. Five submerged macrophytes classified into flat-leaf type (Vallisneria natans and Potamogeton crispus) and thin-leaf type (Hydrilla verticillata, Ceratophyllum demersum, and Myriophyllum spicatum) exhibited strong inhibition effects against Pseudanabaena sp.: Overall inhibition efficiencies (IEs) of 92.7% ± 6.8% and 92.7% ± 8.4% for cell growth and 2-MIB production were achieved, respectively. Moreover, the thin-leaf macrophytes exhibited significant higher IEs for cell growth (94.0% vs. 84.7%) and 2-MIB production (99.4% vs. 82.6%) than the flat-leaf macrophytes and can be selected as pioneer species in controlling odor problems. Nutrient uptake, increasing water clarity, shading effects, and allelopathic effects of the submerged macrophytes were found to be the dominant inhibition mechanisms.

异味化合物 2-甲基异冰片 (2-MIB) 通常与浅层淡水生态系统中丝状蓝藻的增殖和代谢有关。在这里，于 2021 年 7 月至 2021 年 10 月在东太湖进行现场监测以及培养实验，以确定沉水植物对丝状蓝藻生长和 2-MIB 生产的影响。假单胞菌属 被确定为具有最高检出率（100％）和相关系数（R = 0.68，p  <0.001）的2-MIB生产者。与以浮游植物为主的地区相比，大型植物为主的地区的2-MIB浓度和藻类生长显着降低。五种沉水植物分类为平叶型（Vallisneria natans和Potamogeton crispus ) 和薄叶型 ( Hydrilla verticillata , Ceratophyllum demersum和Myriophyllum spicatum ) 对Pseudanabaena有很强的抑制作用sp.：细胞生长和 2-MIB 生产的总体抑制效率 (IE) 分别为 92.7% ± 6.8% 和 92.7% ± 8.4%。此外，与平叶植物相比，薄叶植物的细胞生长（94.0% vs. 84.7%）和2-MIB产量（99.4% vs. 82.6%）表现出显着更高的IEs，可以被选为控制的先锋物种。气味问题。发现沉水植物的养分吸收、增加水的透明度、遮蔽效果和化感作用是主要的抑制机制。