泡果,作为亚洲的外来入侵物种,会对作物产量产生不利影响,生态环境,和人类健康。应用含甲醛的杀软体动物剂是防治泪珠的有效方法之一。为了研究乙醛对成年蜗牛的影响,我们进行了急性毒理学实验,以研究24h和48h甲醛作用后酶活性和组织病理学的变化。结果表明,在暴露时间为24、48、72和96h时,乙醛对泪珠的致死浓度(LC)分别为3.792、2.195、1.833和1.706mg/L。分别。治疗和时间显着影响乙酰胆碱酯酶(AChE),谷胱甘肽S-转移酶(GST),和总抗氧化能力(TAC)活性,性别显著影响AChE,GST,和TAC活性和时间显著影响羧酸酯酶(CarE)。此外,处理和时间的相互作用显著影响了GST的活性,CarE和TAC。此外,发生在消化腺的组织病理学变化,暴露于甲醛的苹果蜗牛的g和腹足动物。消化腺的组织学检查包括消化细胞的萎缩,扩大血淋巴间隙,和嗜碱性粒细胞的增加。在处理过的蜗牛中,the中的血淋巴间隙广泛扩张,柱状细胞杂乱无章甚至坏死,腹足柱状肌细胞排列松散,肌纤维减少。本研究结果可为控制入侵物种的毒性机制提供参考。
Pomacea canaliculata, as an invasive exotic species in Asia, can adversely affect crop yields, eco-environment, and human health. Application of molluscicides containing metaldehyde is one effective method for controlling P. canaliculata. In order to investigate the effects of metaldehyde on adult snails, we conducted acute toxicological experiments to investigate the changes in enzyme activities and
histopathology after 24 h and 48 h of metaldehyde action. The results showed that the median lethal concentrations (LC) of metaldehyde on P. canaliculata were 3.792, 2.195, 1.833, and 1.706 mg/L at exposure times of 24, 48, 72, and 96 h, respectively. Treatment and time significantly affected acetylcholinesterase (AChE), glutathione S-transferase (GST), and total antioxidant capacity (TAC) activity, with sex significantly affecting AChE, GST, and TAC activity and time significantly affecting carboxylesterase (CarE). In addition, the interaction of treatment and time significantly affected the activity of GST, CarE and TAC. In addition, histopathological changes occurred in the digestive glands, gills and gastropods of apple snail exposed to metaldehyde. Histological examination of the digestive glands included atrophy of the digestive cells, widening of the hemolymph gap, and an increase in basophils. In treated snails, the hemolymph gap in the gills was widely dilated, the columnar cells were disorganized or even necrotic, and the columnar muscle cells in the ventral foot were loosely arranged and the muscle fibers reduced. The findings of this study can provide some references for controlling the toxicity mechanism of invasive species.