欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
采用水培实验方法研究了万寿菊体内镉积累和解毒与巯基化合物含量的关系。万寿菊植株分别在镉浓度为0、0．1、0．5、2和8mg／L的营养液中暴露7d，测定了根、茎、叶中镉、非蛋白巯基（NPT）、半胱氨酸（Cys）、γ-谷氨酰半胱氨酸（Y-EC）、谷胱甘肽（GSH）和植物络合素（PCs）的含量。植物根、茎、叶中镉含量都随着镉暴露浓度的增加而增加。当溶液中镉浓度较低（0．1—2mg／L）时，茎叶中NPT、PCs、Cys和γ-Ec含量随着镉浓度增加而增大；当镉浓度较高（8mg／L）时，茎叶中PCs含量迅速降低，GSH含量大幅度增高。在根部，这些巯基化合物的含量几乎不受镉处理影响，且含量较低。以上研究结果表明：PCs在万寿菊镉的解毒机制中发挥一定的作用，暴露于高浓度的镉，GSH比PCs起着更为重要的解毒作用。
英文摘要：
The relationship between thiol-containing compounds accumulation and cadmium （Cd） detoxification was studied. Studies were carried out with marigold （ Tagetes erecta L. ） plants grown in the presence of 0. 1,0.5, 2, 8 mg/L Cd for 7 days. Contents of cysteine （Cys）, γ-glutamyl-cysteine （γ-EC）, glutathione （GSH） , phytochelatins （PCs） and non-protein thiols （NPT）, and Cd accumulation in the root, stem and leaf were determined. Cd contents increased in the plant with the increase of Cd exposure concentration. From 0. 1 to 2 mg/L Cd, contents of NPT, PCs, Cys and γ-EC in stems and leaves significantly increased with increasing Cd doses. However, at the dose of 8 mg/L, the synthesis of PCs in the stem and leaf decreased drastically, and the GSH pool increased significantly. In the root, contents of these thiol-containing compounds were lower and less affected by Cd treatments. These results indicate that PCs play some roles in Cd detoxification, but PCs-mediated chelation are not the most effective strategy to cope with an exposure to toxic levels of this metal.
同期刊论文项目
同项目期刊论文
Degradation of pyrene by immobilized microorganisms in saline-alkaline soil, Journal of Environmenta
Risk assessment of cadmium-contaminated soil on plant DNA damage using RAPD and physiological indice
DNA mismatch repair related gene expression as potential biomarkers to assess cadmium exposure in Ar
Phytoremediation for co-contaminated soils of benzo[a]pyrene (B[a]P) and heavy metals using ornament
Adsorption-desorption characteristics and pollution behavior of reactive X-3B red dye in four Chines
Cd HYPERACCUMULATIVE CHARACTERISTICS OF AUSTRALIA ECOTYPE SOLANUM NIGRUM L. AND ITS IMPLICATION IN S
Effect of Environmentally Friendly Amendment on a Newly Found Accumulator Kalimeris integrifolia Tur
Influence of rapeseed cake on heavy metal uptake by a subsequent rice crop after phytoextraction usi
Cadmium Accumulation in Relation to Organic Acids and Nonprotein Thiols in Leaves of the Recently Fo
Nitrate facilitates cadmium uptake, transport and accumulation in the hyperaccumulator Sedum plumbiz
Composition, sources, and potential toxicology of polycyclic aromatic hydrocarbons (PAHs) in agricul
Interactive effects of chlorimuron-ethyl and copper(II) on their sorption and desorption on two typi
Multilevel ecotoxicity assessment of polycyclic musk in the earthworm Eisenia fetida using tradition
Degradation of pyrene in soils by extracellular polymeric substances (EPS) extracted from liquid cul
Effect of cadmium hyperaccumulation on antioxidative defense and proline accumulation of Solanum nig
Growth, Cadmium Accumulation and Physiology of Marigold (Tagetes erecta L.) as Affected by Arbuscula
Effect of soil pH and organic matter on desorption hysteresis of chlorimuron-ethyl in two typical Ch
In-situ cadmium phytoremediation using solanum nigrum l.: the bio-accumulation characteristics trail
Potential of Taraxacum mongolicum Hand-Mazz for accelerating phytoextraction of cadmium in combinati
Fertilizer amendment for improving the phytoextraction of cadmium by a hyperaccumulator Rorippa glob
Genotoxicity of Tetracycline as an Emerging Pollutant on Root Meristem Cells of Wheat (Triticum aest
Ageing behavior of phenanthrene and pyrene in soils: A study using sodium dodecylbenzenesulfonate ex
Effects of Soil/Solution Ratios and Cation Types on Adsorption and Desorption of Tetracycline in Soi
Occurrence and source analysis of typical veterinary antibiotics in manure, soil, vegetables and gro
Repeated phytoextraction of four metal-contaminated soils using the cadmium/zinc hyperaccumulator Se
Total concentrations of heavymetals and occurrence of antibiotics in sewage sludges from cities thro
Heavy metal concentrations in suburban horticultural soils and metal uptake by Artemisia selengensis
Phytoextraction of cadmium and zinc by Sedum plumbizincicola using different nitrogen fertilizers, a
Adsorption Characteristics and Influencing Factors of Chlorimuron-Ethyl in Two Typical Chinese Soils
Inhibition Mechanisms of Zn Precipitation on Aluminum Oxide by Glyphosate: A P-31 NMR and Zn EXAFS S
Antioxidant enzyme activities and lipid peroxidation in earthworm Eisenia fetida exposed to 1,3,4,6,
Phytoremediation of Cadmium-Contaminated Farmland Soil by the Hyperaccumulator Beta vulgaris L. var.
The effect of polycyclic aromatic hydrocarbon contamination on distribution of the Sphingomonas comm
Tolerant mechanisms of Rorippa globosa (Turcz.) Thell. hyperaccumulating Cd explored from root morph
EMISSION AND CONTROL CHARACTERISTICS FOR INCINERATION OF SEDUM PLUMBIZINCICOLA BIOMASS IN A LABORATO
Copper changes the yield and cadmium/zinc accumulation and cellular distribution in the cadmium/zinc
Occurrence and distribution of heavy metals and tetracyclines in agricultural soils after typical la
Effect of water management on cadmium and arsenic accumulation by rice (Oryza sativa L.) with differ
Single and joint effects of HHCB and cadmium on zebrafish (Danio rerio) in feculent water containing
Effects of sulfur dioxide pollution on the translocation and accumulation of heavy metals in soybean
Potential biochemical and genetic toxicity of triclosan as an emerging pollutant on earthworms (Eise
Identification of cadmium-excluding welsh onion (Allium fistulosum L.) cultivars and their mechanism
Low molecular weight organic acids in root exudates and cadmium accumulation in cadmium hyperaccumul
Dynamics of plant metal uptake and metal changes in whole soil and soil particle fractions during re
Fate of tetrabromobisphenol A and hexabromocyclododecane brominated flame retardants in soil and upt
Poultry manured Bidens tripartite L. extracting Cd from soil - potential for phytoremediating Cd con
Simultaneous extraction of four classes of antibiotics in soil, manure and sewage sludge and analysi
Biochemical Responses of Earthworm Eisenia fetida Exposed to Cadmium-Contaminated Soil with Long Dur
The effects of Fe deficiency on low molecular weight organic acid exudation and cadmium uptake by So
期刊信息
位置：