Ulva prolifera is a macroalgae that forms massive blooms, negatively impacting natural communities, aquaculture operations and recreation. The effects of the natural products, eugenol, β-myrcene, citral and nonanoic acid on the growth rate, antioxidative defense system and photosynthesis of Ulva prolifera were investigated as a possible control strategy for this harmful taxon. Negative effects on growth were observed with all four chemicals, due to the excessive production of reactive oxygen species and oxidative damage to the thalli. However, the response of U. prolifera under the four chemicals stress was different at the cellular level. β-myrcene, the most effective compound in terms of growth inhibition, induced oxidative stress as shown by the damage of total antioxidant capacity (T-AOC) and the downregulation of the glutathione-ascorbate (GSH-ASA) cycle which inhibited the antioxidative system. This chemical also inhibited photosynthesis and photoprotection mechanisms in U. prolifera, resulting in growth limitation. In contrast, U. prolifera was less affected by the second tested chemical, eugenol, and showed no significant change on photosynthetic efficiency in the presence of the chemical. The inhibition effects of the third and fourth tested chemicals, nonanoic acid and citralon, on growth and on the antioxidant defense system in U. prolifera were inferior. These results provide a potential avenue for controlling green tides in the future.

Ulva prolifera是一种大型藻类，会形成大量的花，对自然社区，水产养殖活动和娱乐活动造成负面影响。研究了天然产物丁子香酚，β-月桂烯，柠檬酸和壬酸对乌尔瓦增殖的生长速率，抗氧化防御系统和光合作用的影响，以此作为对该有害生物分类的可能控制策略。由于活性氧的过量产生和对thalli的氧化损伤，所有四种化学物质均对生长产生了负面影响。但是，U。prolifera的反应在四种化学物质下，细胞水平上的压力是不同的。β-月桂烯是抑制生长最有效的化合物，可诱导氧化应激，如总抗氧化能力（T-AOC）的破坏和谷胱甘肽-抗坏血酸（GSH-ASA）周期的下调抑制了抗氧化系统。该化学物质还抑制了U. prolifera中的光合作用和光保护机制，导致生长受限。相反，U。prolifera受第二种测试的化学品丁子香酚的影响较小，并且在该化学品的存在下，其光合作用效率没有显着变化。第三和第四种测试化学品壬酸和柠檬醛对植物生长和抗氧化防御系统的抑制作用U.prolifera较差。这些结果为将来控制绿潮提供了潜在的途径。