Responses of the nitrogen-fixing aquatic fern Azolla to water contaminated with ciprofloxacin: Impacts on biofertilization

被引：37

作者：

Comes, Marcelo Pedrosa ^{[1
,4
]}

Moreira de Brito, Julio Cesar ^{[2
]}

Lima Carvalho Carneiro, Marilia Mercia ^{[3
]}

Ribeiro da Cunha, Mariem Rodrigues ^{[2
]}

Garcia, Queila Souza ^{[1
]}

Figueredo, Cleber Cunha ^{[1
]}

机构：

[1] Univ Fed Minas Gerais, Inst Ciencias Biol, Dept Bot, Ave Antonio Carlos 6627,Caixa Postal 486, BR-31270970 Belo Horizonte, MG, Brazil

[2] Fundacao Ezequiel Dias, Rua Conde Pereira Carneiro 80, BR-30510010 Belo Horizonte, MG, Brazil

[3] Inst Fed Educ Ciencia & Tecnol Baiano, Campus Bom Jesus da Lapa,BR 349,Km 14, Bom Jesus Da Lapa, BA, Brazil

[4] Univ Fed Parana, Setor Ciencias Biol, Dept Bot, Ctr Politecn, Ave Coronel Francisco H dos Santos 100, BR-81531980 Curitiba, Parana, Brazil

来源：

ENVIRONMENTAL POLLUTION | 2018年 / 232卷

关键词：

Water pollution; Fluoroquinolone; Nitrogen; Phytoremediation; Plant-cyanobacteria symbiosis; CHLOROPHYLL FLUORESCENCE; OXIDATIVE STRESS; ANTIBACTERIAL AGENTS; ANTIOXIDANT SYSTEM; MITOCHONDRIAL-DNA; TOXICITY; ANTIBIOTICS; EXPOSURE; SAMPLES; GROWTH;

D O I：

10.1016/j.envpol.2017.09.054

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

We investigated the ability of the aquatic fern Azolla to take up ciprofloxacin (Cipro), as well as the effects of that antibiotic on the N-fixing process in plants grown in medium deprived (-N) or provided (+N) with nitrogen (N). Azolla was seen to accumulate Cipro at concentrations greater than 160 mu g g(-1) dry weight when cultivated in 3.05 mg Cipro I-1, indicating it as a candidate for Cipro recovery from water. Although Cipro was not seen to interfere with the heterocystivegetative cell ratios, the antibiotic promoted changes with carbon and nitrogen metabolism in plants. Decreased photosynthesis and nitrogenase activity, and altered plant's amino acid profile, with decreases in cell N concentrations, were observed. The removal of N from the growth medium accentuated the deleterious effects of Cipro, resulting in lower photosynthesis, N-fixation, and assimilation rates, and increased hydrogen peroxide accumulation. Our results shown that Cipro may constrain the use of Azolla as a biofertilizer species due to its interference with nitrogen fixation processes. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：293 / 299

页数：7

共 49 条

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