With the rapid development of large-scale pig breeding,the problem of environmental pollution around pig farms has become increasingly serious,of which copper pollution has become particularly prominent. Plants such a...With the rapid development of large-scale pig breeding,the problem of environmental pollution around pig farms has become increasingly serious,of which copper pollution has become particularly prominent. Plants such as Leerisia Orygides L.,Eichhornia crassipes（ Mart.） Solms,Commelina communis L.,and Rumex acetosa L. that have strong ability to absorb and transform copper can be used to build constructed wetlands to absorb copper in pig waste,and it can be used as a feed additive to be recycled,which can prevent a larger range of pollution caused by the migration and diffusion of copper.展开更多
Heavy metal pollution has become a worldwide problem in aquaculture. We studied copper （Cu^2＋） accumulation and physiological responses of two red algae Gracilaria lemaneiformis and Gracilaria lichenoides from Chin...Heavy metal pollution has become a worldwide problem in aquaculture. We studied copper （Cu^2＋） accumulation and physiological responses of two red algae Gracilaria lemaneiformis and Gracilaria lichenoides from China under Cu^2＋ exposure of 0-500 μg/L in concentration. Compared with G. lemaneiformis, G. lichenoides was more capable in accumulating Cu^2＋, specifically, more Cu〉 on extracellular side （cell wall） than on intracellular side （cytoplasm） and in cell organelles （especially chloroplast, cell nucleus, mitochondria, and ribosome）. In addition, G. lichenoides contained more insoluble polysaccharide in cell wall, which might promote the extracellular Cu^2＋-binding as an efficient barrier against metal toxicity. Conversely, G. lemaneiformis was more vulnerable than G. lichenoides to Cu^2＋ toxin for decreases in growth, pigment （chlorophyll a, chlorophyll b, phycobiliprotein, and B-carotene） content, and photosynthetic activity. Moreover, more serious oxidative damages in G. lemaneiformis than in G. lichenoides, in accumulation of reactive oxidative species and malondialdehyde, and in electrolyte leakage, because of lower antioxidant enzyme （superoxide dismutase and glutathione reductase） activities. Therefore, G. lichenoides was less susceptible to Cu〉 stress than G. lemaneiformis.展开更多
基金Supported by National Natural Science Foundation of China(41263006,2014BAC04B00,21567010)Program of Jiangxi Provincial Department of Science and Technology(20124ACB01200,20122BBG70086)Program of Jiangxi Academy of Sciences(JAS(2013)No.19-06,2016-YCXY-04,2013-XTPH1-14,2013H003)
文摘With the rapid development of large-scale pig breeding,the problem of environmental pollution around pig farms has become increasingly serious,of which copper pollution has become particularly prominent. Plants such as Leerisia Orygides L.,Eichhornia crassipes（ Mart.） Solms,Commelina communis L.,and Rumex acetosa L. that have strong ability to absorb and transform copper can be used to build constructed wetlands to absorb copper in pig waste,and it can be used as a feed additive to be recycled,which can prevent a larger range of pollution caused by the migration and diffusion of copper.
基金Supported by the Society Development Program of the Natural Science Foundation of Jiangsu Province in China (No.BS2002016)
文摘Heavy metal pollution has become a worldwide problem in aquaculture. We studied copper （Cu^2＋） accumulation and physiological responses of two red algae Gracilaria lemaneiformis and Gracilaria lichenoides from China under Cu^2＋ exposure of 0-500 μg/L in concentration. Compared with G. lemaneiformis, G. lichenoides was more capable in accumulating Cu^2＋, specifically, more Cu〉 on extracellular side （cell wall） than on intracellular side （cytoplasm） and in cell organelles （especially chloroplast, cell nucleus, mitochondria, and ribosome）. In addition, G. lichenoides contained more insoluble polysaccharide in cell wall, which might promote the extracellular Cu^2＋-binding as an efficient barrier against metal toxicity. Conversely, G. lemaneiformis was more vulnerable than G. lichenoides to Cu^2＋ toxin for decreases in growth, pigment （chlorophyll a, chlorophyll b, phycobiliprotein, and B-carotene） content, and photosynthetic activity. Moreover, more serious oxidative damages in G. lemaneiformis than in G. lichenoides, in accumulation of reactive oxidative species and malondialdehyde, and in electrolyte leakage, because of lower antioxidant enzyme （superoxide dismutase and glutathione reductase） activities. Therefore, G. lichenoides was less susceptible to Cu〉 stress than G. lemaneiformis.
