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Comparative toxicity of bentazon and molinate on growth, photosynthetic pigments, photosynthesis, and respiration of the Portuguese ricefield cyanobacterium Nostoc muscorum
10.1002/tox.20486.abs
Bentazon and molinate are selective herbicides recommended for integrated weed management in rice. Their toxicity on growth and some biochemical and physiological parameters of Nostoc muscorum, an abundant cyanobacterium in Portuguese rice fields, was evaluated under laboratory conditions during time‐ and concentration‐dependent exposure for 72 h. Results showed that toxic concentrations (0.75–2 mM) of both herbicides have pleiotropic effects on the cyanobacterium. Molinate was more toxic than bentazon to growth, respiration, chlorophyll‐a, carotenoids, and phycobiliproteins contents. Protein content was increased by both herbicides although the effect was particularly evident with higher concentrations of molinate (1.5–2 mM). The herbicides had contrasting effects on carbohydrates content: molinate increased this organic fraction whereas bentazon decreased it. Photosynthesis and respiration were inhibited by both herbicides. © 2009 Wiley Periodicals, Inc. Environ Toxicol, 2010.
Comparative toxicity of bentazon and molinate on growth, photosynthetic pigments, photosynthesis, and respiration of the Portuguese ricefield cyanobacterium Nostoc muscorum
10.1002/tox.20486.abs
Bentazon and molinate are selective herbicides recommended for integrated weed management in rice. Their toxicity on growth and some biochemical and physiological parameters of Nostoc muscorum, an abundant cyanobacterium in Portuguese rice fields, was evaluated under laboratory conditions during time‐ and concentration‐dependent exposure for 72 h. Results showed that toxic concentrations (0.75–2 mM) of both herbicides have pleiotropic effects on the cyanobacterium. Molinate was more toxic than bentazon to growth, respiration, chlorophyll‐a, carotenoids, and phycobiliproteins contents. Protein content was increased by both herbicides although the effect was particularly evident with higher concentrations of molinate (1.5–2 mM). The herbicides had contrasting effects on carbohydrates content: molinate increased this organic fraction whereas bentazon decreased it. Photosynthesis and respiration were inhibited by both herbicides. © 2009 Wiley Periodicals, Inc. Environ Toxicol, 2010.
Comparative toxicity of bentazon and molinate on growth, photosynthetic pigments, photosynthesis, and respiration of the Portuguese ricefield cyanobacterium Nostoc muscorum
Galhano, Victor (author) / Peixoto, Francisco (author) / Gomes‐Laranjo, José (author) / Fernández‐Valiente, Eduardo (author)
Environmental Toxicology ; 25 ; 147-156
2010-04-01
10 pages
Article (Journal)
Electronic Resource
English
ordram , rice fields , Nostoc muscorum , herbicide , bentazon , molinate , growth , photosynthesis , cyanobacteria , basagran
Toxicity Potential of a Textile Dye Toward the Diazotrophic Cyanobacterium Nostoc muscorum ISU
| Online Contents | 1994