环素和链杆菌素联合应用对大米土壤微生物多样性和功能的影响
Sophia Subhadarsini Pradhan1,2, Arabinda Mahanty1, Ansuman Senapati1
1ICAR-National Rice Research Institute, Cuttack, Odisha, 753006, India.
Environmental science and pollution research international
|November 13, 2024
概括
土中的抗生素残留物,如四环素和菌素,对微生物群落产生负面影响. 它们的应用减少了细菌多样性和酶活性,联合抗生素造成了最严重的伤害.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 土壤科学 土壤科学
背景情况:
- 在农业中使用抗生素导致土壤污染.
- 了解抗生素残留的持久性和生态影响至关重要.
研究的目的:
- 在大米土壤中量化抗生素残留物 (四环素,链杆菌素,链杆菌素).
- 评估这些抗生素对土壤微生物社区结构和功能的影响.
主要方法:
- 微观世界实验不同剂量的抗生素 (0.5RD,RD,2RD).
- 使用衰变模型和半衰期确定 (DT50) 量化残留物.
- 基因组分析 (Illumina-MiSeq) 用于评估微生物群落结构和多样性指数 (Shannon,Simpson,ACE,Chao1).
- 测量土壤酶活动 (脱酶,β-葡萄糖酶等). ) 的情况.
主要成果:
- 在RD时,四环素在9天内降解;菌素和环素需要21天.
- 环素的半衰期为46.5-53.3小时,链菌素为177.6-198小时.
- 抗生素的应用显著降低了土壤酶的活动.
- 甲基因组分析显示,主要细菌类 (Chloroflexi,Actinobacteria等) 的抑制. ) 的情况.
- 细菌的多样性下降,而链状环素显示出最突出的减少.
结论:
- 抗生素残留物存在于大米土壤中,降解速度各不相同.
- 抗生素会对土壤微生物社区的结构,多样性和功能产生负面影响.
- 联合抗生素 (链环素) 的负面影响比单独的抗生素更为明显.
相关概念视频
01:27Combined Effects of Drugs: Synergism
3.7K
Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...
Such synergistic combinations...
3.7K
02:11The Roles of Bacteria and Fungi in Plant Nutrition
35.1K
Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.
35.1K