Lícia Priscila Nogueira Azevedo, Tiago Borges Rocha, F. B. Gonçalves, Ana Beatriz Frazão Ribeiro, Victorina Bispo Aires, E. Erasmo, K. L. F. Silva
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引用次数: 0
摘要
巴西是世界上使用农药最多的国家之一。这些化学物质会对生态系统造成不利的变化,特别是通过漂流对非目标原生森林物种的污染。杀虫剂造成的危害不仅是环境破坏,还包括公共健康问题。本研究旨在探讨草甘膦对赤霉素幼苗叶片气体交换、光合色素和形态结构的影响。分析了0、550、1110和2220 g a.e. ha-1浓度草甘膦对大肠杆菌的视觉毒性、生理和形态解剖特征。结果表明,该除草剂在不同处理下均对叶片产生毒性。在47 DAA时,光合作用(A)、气孔导度(gs)和蒸腾作用(E)也有所减少。草甘膦对痢疾杆菌叶片的解剖结构造成损伤。从分析的数据可以肯定,痢疾杆菌的植物对草甘膦的作用是敏感的。可见的症状,如叶片边缘的黄化和坏死,是农村社区可以用来警告污染风险的指标。
Physiological and anatomical responses of Eugenia dysenterica to glyphosate
Abstract Brazil is among the countries that most use pesticides in the world. These chemicals cause undesirable changes in ecosystems, particularly the contamination of non-target native forest species through drift. The nuisances caused by pesticides go beyond environmental damage and include public health problems. The objective of this work was to evaluate the effects of glyphosate on leaf gas exchange, photosynthetic pigments and morphoanatomy of seedlings of Eugenia dysenterica. The visual toxicity, physiological and morphoanatomical characteristics of E. dysenterica, when exposed to concentrations of 0, 550, 1110 and 2220 g a.e. ha-1 of glyphosate, were analyzed. The results indicate that the herbicide caused toxicity in the leaves in all treatments. Reductions in photosynthesis (A), stomatal conductance (gs), and transpiration (E) at 47 DAA, were also identified. Glyphosate caused damage to the anatomical structures of E. dysenterica leaves. From the data analyzed it is possible to affirm that plants of E. dysenterica are sensitive to the action of glyphosate. Visible symptoms such as chlorosis and necrosis in the leaf edge are indicators that can be used by rural communities as a warning of the risk of contamination.