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Toxic effects of crude-oil-contaminated soil in aquatic environment on Carassius auratus and their hepatic antioxidant defense system

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Journal of Environmental Sciences 2009年第5期21卷 612-617页

作者： WANG Yuanyuan ZHOU Qixing PENG Shengwei MA Lena Q NIU Xiaowei Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education of China) College of Environmental Science and Engineering Nankai University Tganjin 300071 China Soil and Water Science Department University of Florida Gainesville FL 32611-0290 USA

Under the indoor simulant conditions, toxic effects of crude-oil-contaminated soil which was put into aquatic environment on the young fishes Carassius auratus and their hepatic antioxidant system after a 20-d exposure were investigated. Results showed that the relationship between the mortality of C. auratus and the exposed doses could be divided into 3 phases： fishes exposed to the low dose groups （0.5-5.0 g/L） were dead due to the ingestion of crude-oil-contaminated soils in aquatic environment; at the medium dose groups （5.0-25.0 g/L） fishes were dead due to the penetration of toxic substances; at the high dose groups （25.0-50.0 g/L） fishes were dead due to environmental stress. The highest mortality and death speed were found in the 1.0 g/L dose group, and the death speed was sharply increased in the 50.0 g/L dose group in the late phase of exposure. The activities of superoxide dismutase （SOD）, catalase （CAT） and glutathione S-transferase （GST） and the content of malaondialdehyde （MDA） in the hepatic tissues of C. auratus were induced significantly. The activity of SOD was increased and then decreased. It was significantly inhibited in the 50.0 g/L dose group. The activity of CAT was highly induced, and restored to a level which is little more than the control when the exposed doses exceeded 10.0 g/L. The activity of GST was the most sensitive, it was significantly induced in all dose groups, and the highest elevation was up to 6 times in the 0.5 g/L dose group comparing with the control. The MDA content was significantly elevated in the 50.0 g/L dose group, and the changes of the MDA content were opposite with the changes of GST activity.

关键词： crude-oil-contaminated soil ecotoxicology aquatic environment Carassius auratus antioxidant defense system

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Silicon and Nitric Oxide-Mediated Regulation of Growth Attributes, Metabolites and antioxidant defense system of Radish (Raphanus sativus L.) under Arsenic Stress

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Phyton-International Journal of Experimental Botany 2023年第3期92卷 763-782页

作者： Savita Bhardwaj Tunisha Verma Ali Raza Dhriti Kapoor Department of Botany School of Bioengineering and BiosciencesLovely Professional UniversityPhagwara144411India College of Agriculture Fujian Agriculture and Forestry University(FAFU)Fuzhou350002China

Arsenic(As)contaminated food chains have emerged as a serious public concern for humans and animals and are known to affect the cultivation of edible crops throughout the ***,the present study was designed to investigate the individual as well as the combined effects of exogenous silicon(Si)and sodium nitroprusside(SNP),a nitric oxide(NO)donor,on plant growth,metabolites,and antioxidant defense systems of radish(Raphanus sativus L.)plants under three different concentrations of As stress,i.e.,0.3,0.5,and 0.7 mM in a pot *** results showed that As stress reduced the growth parameters of radish plants by increasing the level of oxidative stress markers,i.e.,malondialdehyde and hydrogen ***,foliar application of Si(2 mM)and pretreatment with SNP(100μM)alone as well as in combination with Si improved the plant growth parameters,i.e.,root length,fresh and dry weight of plants under As ***,As stress also reduced protein,and metabolites contents(flavonoids,phenolic and anthocyanin).Activities of antioxidative enzymes such as catalase(CAT),ascorbate peroxidase(APX),guaiacol peroxidase(POD),and polyphenol oxidase(PPO),as well as the content of non-enzymatic antioxidants(glutathione and ascorbic acid)decreased under As *** most of the parameters in radish,As III concentration showed maximum reduction,as compared to As I and II ***,the individual and combined application of Si and NO significantly alleviated the As-mediated oxidative stress in radish plants by increasing the protein,and metabolites *** in the activities of CAT,APX,POD and PPO enzymes were *** of glutathione and ascorbic acid were also enhanced in response to co-application of Si and NO under As *** obtained were more pronounced when Si and NO were applied in combination under As stress,as compared to their individual *** short,the current study highlights that Si and NO synergisticall

关键词： antioxidant defense system oxidative stress metal stress metabolism reactive oxygen species crop productivity

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Neurochemical alterations and compromised antioxidant defense system in the brain of C57BL/6 mouse exposed to cuprizone for 7 days

Neurochemical alterations and compromised antioxidant defens...

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中国神经科学学会第十届全国学术会议

作者： Yinghua XUAN Gen YAN Hui PENG Renhua WU Haiyun XU Mental Health Center Shantou University Medical College Department of Radiology the Second Affiliated HospitalShantou University Medical College

Objective Cuprizone(CPZ) is a copper chelating agent and has been shown to induce demyehnation and oligodendrocyte loss in the brain of C57BL/6 mouse following CPZ treatment for a couple of ***,there is little information available about the possible changes during the early stage of the *** aim of the present study was to explore the possible neurochemical changes and alterations in antioxidant defense system in the brain of C57BL/6 mouse during the early stage of *** C57BL/6 mice were given 0.2%CPZ-containing diet for 7 days while controls ate the same diet without *** days 3 and 7,the animals were subjected to behavioral tests and proton magnetic resonance spectroscopy(1H-MRS),for which the volume(2.6 mm x6.0 mm x 2.6 mm) of interest was located in the hippocampus,on the following *** the end point,mice were sacrificed and specific brain regions(cortex,hippocampus,and caudoputamen) of them were analyzed biochemically for the measurements of malondialdehyde(MDA),HO,supers oxide dismutase(SOD),catalase(CAT) and total antioxidant capacity(TAC).Results CPZ-feeding for 7 days,but not 3 days,led to anxiety-like behavior,but did not affect the spatial working memory of the ***-feeding for 3 days increased the concentrations of glutamate andγ-aminobutyric acid(GABA) in the hippocampus compared to *** to CPZ fro 7 days increased the concentration of GABA,but decreased the concentrations of N-acetyl aspartate(NAA) and phosphocreatine(PCr) in the brain ***-feeding for 7 days decreased the activity of CAT in the hippocampus and the TAC in caudoputamen,but increased the activity of SOD in *** same treatment did not change levels of MDA and HO the *** These results provided neurochemical and biochemical evidence for CPZ-induced changes in the brain of mouse during the early stage of CPZ-feeding when no demyelination and oligodendrocyte loss *** compromised antioxidant defense s

关键词： 1H-MRS antioxidant defense system cuprizone

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Spirulina platensis extract improves the production and defenses of the common bean grown in a heavy metals-contaminated saline soil

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Journal of Environmental Sciences 2023年第7期129卷 240-257页

作者： Mostafa M.Rady Ahmed S.Elrys Eman Selem Ahmed A.A.Mohsen Safaa M.A.I.Arnaout Ahmed H.El-Sappah Khaled A.El-Tarabily El-Sayed M.Desoky Botany Department Faculty of AgricultureFayoum UniversityFayoum 63514Egypt College of Tropical Crops Hainan UniversityHaikou 570228China Soil Science Department Faculty of AgricultureZagazig UniversityZagazig 44511Egypt Botany and Microbiology Department Faculty of ScienceZagazig UniversityZagazig 44511Egypt Horticulture Department Faculty of AgricultureZagazig UniversityZagazig 44511Egypt Botany Department Faculty of AgricultureZagazig UniversityZagazig 44511Egypt Genetics Department Faculty of AgricultureZagazig UniversityZagazig 44511Egypt Department of Biology College of ScienceUnited Arab Emirates UniversityAl-Ain 15551United Arab Emirates Khalifa Center for Genetic Engineering and Biotechnology United Arab Emirates UniversityAl-Ain 15551United Arab Emirates Harry Butler Institute Murdoch UniversityMurdoch 6150Australia

Plants have to cope with several abiotic stresses,including salinity and heavymetals(HMs).Under these stresses,several extracts have been used as effective natural biostimulants,however,the use of Spirulina platensis(SP)extract(SPE)remains *** effects of SPE were evaluated as soil addition(SA)and/or foliar spraying(FS)on antioxidant defenses and HMs content of common bean grown in saline soil contaminated with ***(40 or 80 mg SPE/hill added as SA or 20 or 40 mg SPE/plant added as FS)or integrative(SA+FS)applications of SPE showed significant improvements in the following order:SA-80+FS-40>SA-80+FS-20>SA-40+FS-40>SA-40+FS-20>SA-80>SA-40>FS-40>FS-20>***,the integrative SA+FS with 40 mg SP/plant was the most effective treatment in increasing plant growth and production,overcoming stress effects and minimizing contamination of the edible *** significantly increased plant growth(74%–185%)and yield(107%–227%)by enhancing net photosynthetic rate(78.5%),stomatal conductance(104%),transpiration rate(124%),and contents of carotenoids(60.0%),chlorophylls(49%–51%),and NPK(271%–366%).These results were concurrent with the marked reductions in malondialdehyde(61.6%),hydrogen peroxide(42.2%),nickel(91%–94%),lead(80%–9%),and cadmium(74%–91%)contents due to the improved contents of glutathione(87.1%),ascorbate(37.0%),andα-tocopherol(77.2%),and the activities of catalase(18.1%),ascorbate peroxidase(18.3%),superoxide dismutase(192%),and glutathione reductase(52.2%)as reinforcing ***,this most effective treatment is recommended to mitigate the stress effects of salinity and HMs on common bean production while minimizing HMs in the edible part.

关键词： antioxidant defense system Biostimulants Heavy metals Microalgae extracts Saline soil Soil pollution

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Enrichment and toxic effects of triclosan on aquatic macrophytes Eichhornia crassipes and Hydrilla verticillata exposed to triclosan in sediments

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Ecological Processes 2023年第1期12卷 860-871页

作者： Xiuxiu Yan Fangyu Hu Jing An Yongchao Yin Lingyan Zhang Shuhe Wei Key Laboratory of Pollution Ecology and Environmental Engineering Institute of Applied EcologyChinese Academy of SciencesShenyang 110016China University of Chinese Academy of Sciences Beijing 100049China Department of Biology Northeastern UniversityBostonMA 02115USA

Background Clarifying the enrichment and response processes of triclosan(TCS)in hydrophytes is crucial for assessing the ecological risk of TCS in aquatic *** study delves into the chronic toxic effects of TCS in floating plant Eichhornia crassipes(Mart.)Solms and submerged plant Hydrilla verticillata(L.f.)Royle exposed to TCS sediments through hydroponic *** The absorption abilities of hydrophytes to TCS were *** concentration of TCS in the roots of *** was significantly higher than that in its leaves,while the absorption capacities of the leaves of *** to TCS were stronger than that in its ***,the physiological indexes,including chlorophyll concentration,soluble protein concentration,and antioxidant enzyme activities,showed a significant decrease with the exposure concentration and time of *** the chlorophyll and soluble protein concentrations and the antioxidant enzyme activities in the leaves were initially increased at a low concentration of TCS(at 7 days of exposure),they decreased significantly over *** to the leaves,the physiological indexes of the roots were more sensitive to the ecotoxicological effects of *** inhibition effects of TCS on *** were signifi-cantly higher than those on ***,which may be associated with the absorbing abilities of TCS and the growth characteristics of the ***’s correlation analysis found a significant negative correlation between the TCS concentrations and the antioxidant enzyme activities in the *** This study highlighted the differences in the uptake and enrichment process and toxic effects of TCS by different aquatic *** with ***,*** is more sensitive to TCS toxicity.

关键词： Triclosan Aquatic macrophyte Enrichment antioxidant defense system Ecotoxicological effect

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Responses of the antioxidant system to fluroxypyr in foxtail millet (Setaria italica L.) at the seedling stage

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Journal of Integrative Agriculture 2018年第3期17卷 554-565页

作者： GUO Mei-jun WANG Yu-guo YUAN Xiang-yang DONG Shu-qi WEN Yin-yuan SONG Xi-e GUO Ping-yi Key Laboratory of Crop Chemical Regulation and Chemical Weed Control of Shanxi Province/Agronomy College Shanxi Agricultural University

Foxtail millet （Setaria italica L.） is an important food and fodder crop in semi-arid areas. However, there are few herbicides suitable for use on weed control in field-grown foxtail millet during the post-emergence herbicides stage. The present study was conducted using four concentrations （0.5, 1, 2, and 4 L ai ha-1） of foliar-applied fluroxypyr, and the effect of fluroxypyr on selected metabolic and stress-related parameters in foxtail millet were assessed after 15 days. In this study, increasing concentrations decreased plant height and accumulation of chlorophylls. Our results also showed that malondialdehyde （MDA） accumulated in response to fluroxypyr application, demonstrating increased lipid peroxidation due to excessive reactive oxygen species production. In response to this oxidative stress, the activities of antioxidant enzymes were generally enhanced. Non-enzymatic antioxidant defense systems, which function in concert with antioxidant enzymes, can also protect plant cells from oxidative damage by scavenging reactive oxygen species （ROS）. In conclusion, the hybrid variety （Zhangzagu） exhibited a greater tolerance to fluroxypyr than did the conventional variety Jingu 21, which might be associated with the antioxidant mechanisms of Zhangzagu hybrid millet.

关键词： antioxidant defense system fluroxypyr reactive oxygen species Spring hybrid millet

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Grain Yield,Biomass Accumulation,and Leaf Photosynthetic Characteristics of Rice under Combined Salinity-Drought Stress

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Rice science 2024年第1期31卷 118-128,I0023页

作者： WEI Huanhe GENG Xiaoyu ZHANG Xiang ZHU Wang ZHANG Xubin CHEN Yinglong HUO Zhongyang ZHOU Guisheng MENG Tianyao DAI Qigen Jiangsu Key Laboratory of Crop Cultivation and Physiology/Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops/Key Laboratory of Saline-Alkali Soil Reclamation and Utilization in Coastal Areas the Ministry of Agriculture and Rural Affairs of China/Research Institute of Rice Industrial Engineering TechnologyYangzhou UniversityYangzhou 225009China Institute of Agricultural Science and Technology Development/Joint International Research Laboratory of Agriculture and Agri-Product Safety the Ministry of Education of ChinaYangzhou UniversityYangzhou 225009China

Simultaneous stresses of salinity and drought often coincide during rice-growing seasons in saline lands,primarily due to insufficient water resources and inadequate irrigation ***,combined salinity-drought stress poses a major threat to rice *** this study,two salinity levels(NS,non-salinity;HS,high salinity)along with three drought treatments(CC,control condition;DJ,drought stress imposed at jointing;DH,drought stress imposed at heading)were performed to investigate their combined influences on leaf photosynthetic characteristics,biomass accumulation,and rice yield ***,drought,and their combination led to a shortened growth period from heading to maturity,resulting in a reduced overall growth *** yield was reduced under both salinity and drought stress,with a more substantial reduction under the combined salinity-drought *** combined stress imposed at heading caused greater yield losses in rice compared with the stress imposed at ***,the combined salinity-drought stress induced greater decreases in shoot biomass accumulation from heading to maturity,as well as in shoot biomass and nonstructural carbohydrate(NSC)content in the stem at heading and ***,it increased the harvest index and NSC remobilization *** and drought reduced the leaf area index and SPAD value of flag leaves and weakened the leaf photosynthetic characteristics as indicated by lower photosynthetic rates,transpiration rates,and stomatal *** reductions were more pronounced under the combined ***,drought,and especially their combination,decreased the activities of ascorbate peroxidase,catalase,and superoxide dismutase,while increasing the contents of malondialdehyde,hydrogen peroxide,and superoxide *** results indicated a more significant yield loss in rice when subjected to combined salinity-drought *** individual and combined stresses of salinity and dro

关键词： antioxidant defense system combined salinity-drought stress drought stress photosynthetic characteristics rice salinity stress

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Higher levels of the lipophilic antioxidants coenzyme Q_(10) and vitamin E in long-lived termite queens than in short-lived workers

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Insect Science 2024年第1期31卷 201-210页

作者： Eisuke Tasaki Yorihiro Yamamoto Yoshihito Iuchi Department of Biological Chemistry Graduate School of Sciences and Technology for InnovationYamaguchi UniversityYamaguchiJapan School of Bioscience and Biotechnology Tokyo University of TechnologyHachiojiTokyoJapan

Termite queens and kings live longer than nonreproductive *** molecular mechanisms contributing to their long lifespan have been investigated;however,the underlying biochemical explanation remains *** Q(CoQ),a component of the mitochondrial electron transport chain,plays an essential role in the lipophilic antioxidant defense *** beneficial effects on health and longevity have been well studied in several ***,we demonstrated that long-lived termite queens have significantly higher levels of the lipophilic antioxidant CoQ_(10) than *** chromatography analysis revealed that the levels of the reduced form of CoQ_(10) were 4 fold higher in the queen's body than in the worker's *** addition,queens showed 7 fold higher levels of vitamin E,which plays a role in antilipid peroxidation along with CoQ,than ***,the oral administration of CoQ_(10) to termites increased the CoQ_(10) redox state in the body and their survival rate under oxidative *** findings suggest that CoQ_(10) acts as an efficient lipophilic antioxidant along with vitamin E in long-lived termite *** study provides essential biochemical and evolutionary insights into the relationship between CoQ_(10) concentrations and termite lifespan extension.

关键词： antioxidant defense system coenzyme Q termite queens vitamin E

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Biochar potentially enhances maize tolerance to arsenic toxicity by improving physiological and biochemical responses to excessive arsenate

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Biochar 2023年第1期5卷 1222-1242页

作者： Md.Mezanur Rahman Ashim Kumar Das Sharmin Sultana Protik Kumar Ghosh Md.Robyul Islam Sanjida Sultana Keya Minhaz Ahmed Sheikh Arafat Islam Nihad MdArifur Rahman Khan Mylea C.Lovell Md.Abiar Rahman S.M.Ahsan Touhidur Rahman Anik Pallavi Fnu Lam-Son Phan Tran Mohammad Golam Mostofa Department of Plant Soil ScienceInstitute of Genomics for Crop Abiotic Stress ToleranceTexas Tech UniversityLubbockTX 79409USA Department of Agroforestry EnvironmentBangabandhu Sheikh Mujibur Rahman Agricultural UniversityGazipur 1706Bangladesh Institute of Biotechnology and Genetic Engineering(IBGE) Bangabandhu Sheikh Mujibur Rahman Agricultural UniversityGazipur 1706Bangladesh Department of Agronomy Bangabandhu Sheikh Mujibur Rahman Agricultural UniversityGazipur 1706Bangladesh Plant Pathology Division Bangladesh Rice Research InstituteGazipur 1701Bangladesh Department of Agriculture Bangabandhu Sheikh Mujibur Rahman ScienceTechnology UniversityGopalganj 8100Bangladesh Department of Energy Plant Research Laboratory Michigan State UniversityEast LansingMI 48824USA Plant Resilience Institute Michigan State UniversityEast LansingMI 48824USA Department of Biochemistry and Molecular Biology Michigan State UniversityEast LansingMI 48824USA

Metalloid pollution,including arsenic poisoning,is a serious environmental issue,plaguing plant productivity and quality of life ***,a carbon-rich material,has been known to alleviate the negative effects of environmental pollutants on ***,the specific role of biochar in mitigating arsenic stress in maize remains relatively ***,we elucidated the functions of biochar in improving maize growth under the elevated level of sodium arsenate(Na_(2)AsO_(4),AsV).Maize plants were grown in pot-soils amended with two doses of biochar(2.5%(B1)and 5.0%(B2)biochar Kg^(−1) of soil)for 5 days,followed by exposure to Na_(2)AsO_(4)(’B1+AsV’and’B2+AsV’)for 9 *** plants exposed to AsV only accumulated substantial amount of arsenic in both roots and leaves,triggering severe phytotoxic effects,including stunted growth,leaf-yellowing,chlorosis,reduced photosynthesis,and nutritional imbalance,when compared with control ***,biochar addition improved the phenotype and growth of AsV-stressed maize plants by reducing root-to-leaf AsV translocation(by 46.56 and 57.46%in‘B1+AsV’and‘B2+AsV’plants),improving gas-exchange attributes,and elevating chlorophylls and mineral levels beyond AsV-stressed *** pretreatment also substantially counteracted AsV-induced oxidative stress by lowering reactive oxygen species accumulation,lipoxygenase activity,malondialdehyde level,and electrolyte *** oxidative stress in‘B1+AsV’and‘B2+AsV’plants likely supported by a strong antioxidant system powered by biochar-mediated increased activities of superoxide dismutase(by 25.12 and 46.55%),catalase(51.78 and 82.82%),and glutathione S-transferase(61.48 and 153.83%),and improved flavonoid levels(41.48 and 75.37%,respectively).Furthermore,increased levels of soluble sugars and free amino acids also correlated with improved leaf relative water content,suggesting a better osmotic acclimatization mechanism in biochar-pretreated AsV-exposed plants.

关键词： Arsenic contamination antioxidant defense system Biochar Gas-exchange attributes Nutrient dynamics Oxidative stress

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Mycorrhiza improves cold tolerance of Satsuma orange by inducing antioxidant enzyme gene expression

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BIOCELL 2022年第8期46卷 1959-1966页

作者： MING-AO CAO FEI ZHANG ELSAYED FATHI ABD_ALLAH QIANG-SHENG WU College of Horticulture and Gardening Yangtze UniversityJingzhou434025China College of Biology and Agricultural Resources Huanggang Normal UniversityHuanggang438000China Plant Production Department College of Food and Agricultural SciencesKing Saud UniversityRiyadh11451Saudi Arabia

A potted experiment was carried out to study the effect of an arbuscular mycorrhizal fungus(Diversispora versiformis)and arbuscular mycorrhizal like fungus(Piriformospora indica)on antioxidant enzyme defense system of Satsuma orange(Citrus sinensis *** 4)grafted on Poncirus trifoliata under favourable temperature(25°C)and cold temperature(0°C)for 12 *** short-term treatment of cold temperature did not cause any significant change in root fungal colonization and spore density in *** cold stress,*** inoculation did not change the activity of superoxide dismutase(SOD),catalase(CAT),and peroxidase(POD)in leaves and roots,whereas *** inoculation significantly increased the activity of CAT in roots and POD in leaves *** addition,inoculation of two mycorrhizal fungi under cold stress significantly increased the relative expression levels of PtPOD and PtF-SOD in leaves,*** up-regulated the expression levels of PtCu/Zn-SOD in leaves,and *** also induced the expression levels of PtMn-SOD and PtCAT1 in *** addition,inoculated Oita 4 trees maintained significantly lower hydrogen peroxide levels and malondialdehyde contents in leaves and roots under cold temperature,suggesting lower oxidative ***,we concluded that arbuscular mycorrhizal fungi(especially ***)mainly induced the expression of antioxidant enzyme genes,depending on the fungal species,and thus mitigated oxidative damage for higher cold resistance in inoculated plants.

关键词： antioxidant defense system Citrus Cold stress Mycorrhiza Oxidative burst

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