This work evaluated the biochemical responses of the endogeic earthworm Balanteodrilus extremus exposed for 14 and 48 days (d) to soils collected from two tropical agricultural systems: maize-sorghum (MS) and soybean-sorghum (SS). A soil without agricultural management (WAM) and the use of pesticides was selected as a reference. The presence of organochlorine (OC) and organophosphate (OP) pesticide residues was quantified in MS and SS soils. Biomarkers of detoxification [glutathione S transferase (GST)], neurotoxicity [acetylcholinesterase (AChE)] and oxidative stress [superoxide dismutase (SOD), catalase (CAT) and lipoperoxidation (LPO)] were evaluated in B. extremus. The concentration of OP pesticide residues was higher in SS than in MS. Activity of AChE in B. extremus exposed to SS soil for 14 d was significantly more inhibited (78%) than in MS soil (68%). B. extremus has been shown to be a good bioindicator of contaminated soils in tropical regions.

这项工作评估了内生蚯蚓Balanteodrilus extremus对从玉米-高粱 (MS) 和大豆-高粱 (SS) 这两个热带农业系统收集的土壤暴露 14 和 48 天 (d) 的生化反应。选择没有农业管理（WAM）和使用农药的土壤作为参考。对 MS 和 SS 土壤中有机氯 (OC) 和有机磷 (OP) 农药残留的存在进行了定量。在极端芽孢杆菌中评估了解毒生物标志物 [谷胱甘肽 S 转移酶 (GST)]、神经毒性 [乙酰胆碱酯酶 (AChE)] 和氧化应激 [超氧化物歧化酶 (SOD)、过氧化氢酶 (CAT) 和脂质过氧化 (LPO)] 。 SS 中的 OP 农药残留浓度高于 MS 中。暴露于 SS 土壤 14 d 的极端芽孢杆菌中的 AChE 活性（78%）明显比 MS 土壤（68%）受到更多抑制。极端芽孢杆菌已被证明是热带地区污染土壤的良好生物指示剂。