硒腹
光合作用
叶绿素
生物
绿藻门
藻类
叶绿素a
磺胺甲恶唑
绿藻科
植物
化学
抗生素
生物化学
作者
Binyang Liu,Weiqiu Liu,Xiaoqin Nie,Chao Guan,Ye Yang,Zhaohui Wang,Wei Liao
标识
DOI:10.1016/s1001-0742(10)60608-0
摘要
The effects of three types of antibiotics (erythromycin, ciprofloxacin and sulfamethoxazole) on the photosynthesis of freshwater algae, Selenastrum capricornutum Printz, were investigated by determining the growth rate, chloroplast pigments content, seven main precursors (including δ-aminolevulinic acid, porphobilinogen, uroporphyrinogen III, coproporphyrinogen III, protoporphyrin IX, Mg-proporphyrin IX and protochlorophyllide), and photosynthetic rate during chlorophyll biosynthesis. The antibiotics significantly decreased the growth rate, chlorophyll content, and photosynthetic rate. Erythromycin induced a decreasing effect at a concentration of 0.06 mg/L, while ciprofloxacin and sulfamethoxazole achieved the same results at concentrations higher than 1.5 mg/L. Only erythromycin significantly inhibited chlorophyll biosynthesis, which indicated that it was considerably more toxic to S. capricornutum than ciprofloxacin and sulfamethoxazole, and may pose a high potential risk to aquatic ecosystems.
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