School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada.
Laboratory Services Division, University of Guelph, Guelph, Ontario, Canada.
Sci Total Environ. 2015 Mar 1;508:427-34. doi: 10.1016/j.scitotenv.2014.12.014. Epub 2014 Dec 12.
Arbuscular mycorrhizal fungi (AMF) form a symbiotic relationship with the majority of crop plants. AMF provide plants with nutrients (e.g., P), modulate the effect of metal and pathogen exposure, and increase tolerance to moisture stress. The benefits of AMF to plant growth make them important to the development of sustainable agriculture. The land application of biosolids is becoming an increasingly common practice in sustainable agriculture, as a source of nutrients. However, biosolids have been found to contain numerous pharmaceutical and personal care products including antimicrobial chemicals such as triclosan and triclocarban. The potential risks that these two compounds may pose to plant-AMF interactions are poorly understood. The current study investigated whether biosolids-derived triclosan and triclocarban affect the colonization of the roots of lettuce and corn plants by AMF. Plants were grown in soil amended with biosolids that contained increasing concentrations of triclosan (0 to 307 μg/g dw) or triclocarban (0 to 304 μg/g dw). A relationship between the concentration of triclosan or triclocarban and colonization of plants roots by AMF was not observed. The presence of biosolids did not have a significant (p>0.05) effect on percent colonization of corn roots but had a significant, positive effect (p<0.05) on lettuce roots. Biosolids-derived triclosan and triclocarban did not inhibit the colonization of crop plant roots by AMF.
丛枝菌根真菌 (AMF) 与大多数作物形成共生关系。AMF 为植物提供养分（例如 P），调节金属和病原体暴露的影响，并提高对水分胁迫的耐受性。AMF 对植物生长的益处使其成为可持续农业发展的重要因素。生物固体的土地应用在可持续农业中作为养分的来源越来越普遍。然而，生物固体中发现含有许多药物和个人护理产品，包括抗菌化学品如三氯生和三氯卡班。这两种化合物可能对植物-AMF 相互作用构成的潜在风险了解甚少。本研究调查了生物固体衍生的三氯生和三氯卡班是否会影响生菜和玉米植物的 AMF 定殖。在添加含有不同浓度三氯生（0 至 307 μg/g dw）或三氯卡班（0 至 304 μg/g dw）的生物固体的土壤中种植植物。未观察到三氯生或三氯卡班的浓度与 AMF 对植物根系定殖之间存在关系。生物固体的存在对玉米根系的定殖百分比没有显著影响（p>0.05），但对生菜根系有显著的积极影响（p<0.05）。生物固体衍生的三氯生和三氯卡班不会抑制作物植物根系被 AMF 定殖。
