Effects of microcystins on the growth and the activity of superoxide dismutase and peroxidase of rape (Brassica napus L.) and rice (Oryza sativa L.)

Chen, Jianzhong; Song, Lirong; Dai, Jian; Gan, Nanqin; Liu, Zhili

doi:10.1016/j.toxicon.2004.01.011

Cited by 174 publications

(172 citation statements)

References 40 publications

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“…2a), especially at high exposure concentrations (MCLR ≥3 g/ml, or LAS ≥20 g/ml or their mixture ≥3 + 10 g/ml), indicating that individual and joint exposure to the two toxicants in L. minor triggered antioxidant reactions. Increased SOD activity with MCLR treatment was consistent with other results [11,[48][49][50], but little research has focused on SOD activity after LAS exposure [24]. SOD activity was more strongly reduced after 8 d exposure compared with 2 d (Fig.…”

Section: Mclr ( G/ml)supporting

confidence: 89%

Responses and toxin bioaccumulation in duckweed (Lemna minor) under microcystin-LR, linear alkybenzene sulfonate and their joint stress

Wang¹,

Xiao²,

Song³

et al. 2012

Journal of Hazardous Materials

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Section: Mclr ( G/ml)supporting

confidence: 89%

Responses and toxin bioaccumulation in duckweed (Lemna minor) under microcystin-LR, linear alkybenzene sulfonate and their joint stress

Wang¹,

Xiao²,

Song³

et al. 2012

Journal of Hazardous Materials

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“…41 Another study by Chen and his colleagues revealed that exposures of rice and rapes in 120 μg L −1 would significantly inhibit their growth and developments. 38 Exposure of plant tissue directly to lower concentrations of MCs (5−50 μg L −1 ) could also inhibit growth and lead to the changes in chlorophyll content in Solanum tuberosum. 41 In our single-and three-level systems, the dissolved toxin concentration was at around 100 μg L −1 .…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Soil-Based Treatments of Mechanically Collected Cyanobacterial Blooms from Lake Taihu: Efficiencies and Potential Risks

Chen

Jia

et al. 2012

Environ. Sci. Technol.

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In China, mechanical collection of cyanoblooms followed by soil-based treatments has been widely used as emergency strategies in many eutrophicated freshwaters. This study was to evaluate both efficiencies and potential risks of typical soil-based technologies. Results from this study indicated that over 90% of cyanobacterial biomass and 96% of dissolved microcystins (MCs) could be restrained in soils via three-level systems, which were much better than single-level systems. High concentrations of MCs, ranged from 65 to 276 ng g −1 and from 2.12 to 6.6 ng g −1 , were found in soils around treatment systems and croplands, respectively. In the soil solutions, MCs ranged from 0.35 to 2.0 μg L −1 , showing a potentially high leaching risk. In the samples from shallow groundwater near the treatment systems, MC concentrations were detected as high as 1.2 μg L −1 . Moreover, bioaccumulations of MCs varied between 22 and 365 μg kg −1 , and 19−222 μg kg −1 were found in 13 kinds of crops and 7 kinds of wild grass, respectively. Our results indicated for the first time that current soil-based technologies were effective but could pose potential environmental, ecological, and public health risks. Further improvements of these technologies were also proposed based on our findings.

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“…Microcystins (MCs) are a group of cyclic heptapeptide hepatotoxins, mainly produced by the toxic cyanobacterial blooms in eutrophic freshwater all over the world. MCs have been considered responsible for human illnesses (Carmichael et al 2001) and have shown adverse effects on animals and plants (Bouaïcha and Maatouk 2004;Chen et al 2004;Pflugmacher et al 2007;Saqrane et al 2007). The commonly accepted toxic mechanism of MCs is by inhibition of protein phosphatase type-1 and 2A in different organisms, leading to cell damage in animal and plant cells (MacKintosh et al 1990).…”

Section: Introductionmentioning

confidence: 99%

“…So far, more than 80 analogues of MCs have been discovered, among which microcystin-LR (MCLR) is the most abundant and also the most toxic (Hoeger et al 2005). MCs can be accumulated not only in the tissues of animals (Soares et al 2004;Pires et al 2004), but also in terrestrial and aquatic plants (Pflugmacher et al 1998a;Chen et al 2004;Saqrane et al 2007), and can therefore pose a potential risk to human health through the food web. Generally, concentrations of dissolved MCs in natural water range from tens of ng to several lg per liter (Bogialli et al 2006;Song et al 2007) because they are mainly retained within healthy cyanobacterial cells, but high concentration (lg ml -1 ) of MCs in the environment can occur when massive numbers of toxic cyanobacterial cells collapse and decay.…”

Section: Introductionmentioning

confidence: 99%

Effects of microcystin-LR, linear alkylbenzene sulfonate and their mixture on lettuce (Lactuca sativa L.) seeds and seedlings

et al. 2011

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Microcystin-LR (MCLR) and linear alkylbenzene sulfonate (LAS) are present widely in aquatic and terrestrial ecosystems, but their combined ecotoxicological risk is unknown. This study investigated the toxic effects of MCLR, LAS and their mixture on lettuce (Lactuca sativa L.) and evaluated MCLR accumulation level in lettuce with or without LAS. The changes in seed germination and shoot/ root growth, responses of the antioxidative defense system, and the accumulation of MCLR in lettuce were tested to evaluate the single and combined toxic effect of MCLR and LAS in well-controlled conditions. The results showed that seedling growth (except for root elongation and leaf weight) was more sensitive to toxicant exposure than seed germination. For seedling leaves, lipid peroxidation was not observed when the antioxidative defense system (including superoxide dismutase, catalase and glutathione) was activated to relieve the adverse effects of oxidative stress via different pathways. Our results also confirmed that the interaction between MCLR and LAS was synergistic. Both toxicants in combination not only significantly inhibited seedling growth, but also increased the activities of superoxide dismutase and catalase, as well as the contents of glutathione. Furthermore, LAS dramatically enhanced the accumulation of MCLR in the plant, thus leading to a reduction in quality and yield and posing greater potential risk to humans via consumption of these edible plants.

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Effects of microcystins on the growth and the activity of superoxide dismutase and peroxidase of rape (Brassica napus L.) and rice (Oryza sativa L.)

Cited by 174 publications

References 40 publications

Responses and toxin bioaccumulation in duckweed (Lemna minor) under microcystin-LR, linear alkybenzene sulfonate and their joint stress

Responses and toxin bioaccumulation in duckweed (Lemna minor) under microcystin-LR, linear alkybenzene sulfonate and their joint stress

Soil-Based Treatments of Mechanically Collected Cyanobacterial Blooms from Lake Taihu: Efficiencies and Potential Risks

Effects of microcystin-LR, linear alkylbenzene sulfonate and their mixture on lettuce (Lactuca sativa L.) seeds and seedlings

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