期刊：
International Journal of Biological Macromolecules,2024年259(Pt 2):129229 ISSN：0141-8130
通讯作者：
Chen, Bingjie;Xu, Q
作者机构：
[Liang, Yu-Min; Chen, Zhi; Zheng, Pei-Ji; Chen, Bingjie; Xu, Qing; Li, Kang-Li; Xu, Q] Guangzhou Med Univ, GMU GIBH Joint Sch Life Sci, Guangdong Hong Kong Macau Joint Lab Cell Fate Regu, Hong Kong 511436, Peoples R China.;[Zhang, Guo-Qiang] Fujian Agr & Forestry Univ, Key Lab Natl Forestry & Grassland Adm Orchid Conse, Fuzhou 350002, Peoples R China.;[Yan, Binghua] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Rizwana, Humaira; Elshikh, Mohamed Soliman] King Saud Univ, Coll Sci, Dept Bot & Microbiol, PO 2455, Riyadh 11451, Saudi Arabia.
通讯机构：
[Chen, BJ; Xu, Q ] G;Guangzhou Med Univ, GMU GIBH Joint Sch Life Sci, Guangdong Hong Kong Macau Joint Lab Cell Fate Regu, Hong Kong 511436, Peoples R China.
摘要：
The medicinal Dendrobium species of Orchidaceae possess significant pharmaceutical value, and modern pharmacological research has shown that Dendrobium contains many important active ingredients. Alkaloids, the crucial components of medicinal Dendrobium, demonstrate beneficial healing properties in cardiovascular, cataract, gastrointestinal, and respiratory diseases. Members of the cytochrome P450 monooxygenase (CYP) gene family play essential roles in alkaloid synthesis, participating in alkaloid terpene skeleton construction and subsequent modifications. Although studies of the CYP family have been conducted in some species, genome-wide characterization and systematic analysis of the CYP family in medicinal Dendrobium remain underexplored. In this study, we identified CYP gene family members in the genomes of four medicinal Dendrobium species recorded in the Pharmacopoeia: D. nobile, D. chrysotoxum, D. catenatum, and D. huoshanense. Further, we analyzed the motif composition, gene replication events, and selection pressure of this family. Syntenic analysis revealed that members of the clan 710 were present on chromosome 18 in three medicinal Dendrobium species, except for D. nobile, indicating a loss of clan 710 occurring in D. nobile. We also conducted an initial screening of the CYP genes involved in alkaloid synthesis through transcriptome sequencing. Quantitative real-time reverse transcription PCR showed that the expression of DnoNew43 and DnoNew50, homologs of secologanin synthase involved in the alkaloid synthesis pathway, was significantly higher in the stems than in the leaves. This result coincided with the distribution of dendrobine content in Dendrobium stems and leaves, indicating that these two genes might be involved in the dendrobine synthesis pathway. Our results give insights into the CYP gene family evolution analysis in four medicinal Dendrobium species for the first time and identify two related genes that may be involved in alkaloid synthesis, providing a valuable resource for further investigations into alkaloid synthesis pathway in Dendrobium and other medicinal plants.
会议论文集名称：
IOP Conference Series-Earth and Environmental Science
摘要：
Among all natural minerals, the natural clay mineral has been widely used for environmental pollution treatment both in water and soil, especially heavy metal (HM) pollution in recent years. In this review, modified methods for clay minerals and their application for the remediation of HM contaminated water and soil are summarized. The remediation mechanisms of HMs in water and in soil by modified clay minerals were discussed. Moreover, the existing problems and development of clay minerals are also discussed.
会议名称：
7th International Conference on Agro-Geoinformatics (Agro-Geoinformatics)
会议时间：
AUG 06-09, 2018
会议地点：
George Mason Univ, Ctr Spatial Informat Sci & Syst, Hangzhou, PEOPLES R CHINA
会议主办单位：
George Mason Univ, Ctr Spatial Informat Sci & Syst
会议论文集名称：
International Conference on Agro-Geoinformatics
关键词：
cover and management factor;Spatio-temporal change;land use;vegetation coverage;Hunan Province
摘要：
Soil erosion is an important research issue because it can result in serious hazards, such as land quality degrading, flood frequency increasing and deposit in rivers and lakes. The factor of cover and management is a parameter of the soil erosion prediction model and it is the ratio of soil erosion of the present cover and management to continuous clear tillage. Good vegetation cover and the effective land management can control soil erosion to some extent. Quantitative assessment the factor of cover and management in a region scale can provide the cover and management data and some good suggestion for the land use and soil conservation planning. This study chooses Hunan Province in the central and southern China which has no relevant research till now. With the land use and vegetation coverage data of 30 meters resolution extracted from Landsat images in 2000, 2005, 2010 and 2015, the cover and management factor of this region is evaluated and the spatial-temporal characteristics of land use and the factor is analyzed by using the evaluation method, GIS spatial analysis and statistical analysis. The results are as follows. Because the main terrains are mountains and hills which account for 70 percent of the whole province area, the main land use types are forest land and grassland. The mean of cover and management factor is 0.06739, 0.06783, 0.06876 and 0.07421 in 2000, 2005, 2010 and 2015 respectively. The factor increased about 10 percent from 2000 to 2015. The change of cover and management factor may increase soil losses risk if the other factors affecting soil losses are not taken into account.
作者：
Lei, M.*;Tang, L.;Du, H. H.;Peng, L.;Tie, B. Q.;...
作者机构：
[Tang, L.; Lei, M.; Du, H. H.; Tie, B. Q.; Peng, L.] Hunan Agr Univ, Coll Resource & Environm, Changsha, Peoples R China.;[Sun, G. X.] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing, Peoples R China.
会议名称：
7th International Congress and Exhibition on Arsenic in the Environment (As) - Environmental Arsenic in a Changing World
会议时间：
JUL 01-06, 2018
会议地点：
Chinese Acad Sci, Inst Urban Environm, Beijing, PEOPLES R CHINA
会议主办单位：
Chinese Acad Sci, Inst Urban Environm
会议论文集名称：
Arsenic in the Environment
摘要：
In order to mitigate As accumulation in rice, amendments such as iron ore tailing (FeT) and manganese ore tailing (MnT) were employed in As contaminated soil. Before experiment, the toxicities of both amendments were assessed with Toxicity Characteristic Leaching Procedure (TCLP) and horizontal vibration method (HVM), respectively. The ranges of contents of As were 0.13-1.54 mg kg(-1) in husk samples, and 0.06-0.42 mg kg(-1) in brown rice, respectively. Among both amendments treatment, the lowest concentrations of As in rice grain were found by MnT treatment due to its structure and composition. There was significantly negative relation (p < 0.05) between Mn and As, while significantly positive relationship between Fe and As, and ratio of Fe/Mn and As in rice plant (p < 0.05).
会议名称：
2nd International Conference on Energy Engineering and Environmental Protection (EEEP)
会议时间：
NOV 20-22, 2017
会议地点：
Sanya, PEOPLES R CHINA
会议主办单位：
[Hu, Wenmin;Wang, Zhongcheng;Li, Chunhua;Zhao, Jin] Cent South Univ Forestry & Technol, Coll Forestry, LinDa Rd 1, Changsha 410002, Hunan, Peoples R China.^[Li, Yi] Hunan Agr Univ, Coll Resources & Environm, Nongda Rd 1, Changsha 410002, Hunan, Peoples R China.
会议论文集名称：
IOP Conference Series-Earth and Environmental Science
摘要：
Multi-source remote sensing data is rarely used for the comprehensive assessment of land ecologic environment quality. In this study, a digital environmental model was proposed with the inversion algorithm of land and environmental factors based on the multi-source remote sensing data, and a comprehensive index (Ecoindex) was applied to reconstruct and predict the land environment quality of the Dongting Lake Area to assess the effect of human activities on the environment. The main finding was that with the decrease of Grade. and Grade. quality had a decreasing tendency in the lake area, mostly in suburbs and wetlands. Atmospheric water vapour, land use intensity, surface temperature, vegetation coverage, and soil water content were the main driving factors. The cause of degradation was the interference of multi-factor combinations, which led to positive and negative environmental agglomeration effects. Positive agglomeration, such as increased rainfall and vegetation coverage and reduced land use intensity, could increase environmental quality, while negative agglomeration resulted in the opposite. Therefore, reasonable ecological restoration measures should be beneficial to limit the negative effects and decreasing tendency, improve the land ecological environment quality and provide references for macroscopic planning by the government.
会议名称：
7th International Congress and Exhibition on Arsenic in the Environment (As) - Environmental Arsenic in a Changing World
会议时间：
JUL 01-06, 2018
会议地点：
Chinese Acad Sci, Inst Urban Environm, Beijing, PEOPLES R CHINA
会议主办单位：
Chinese Acad Sci, Inst Urban Environm
会议论文集名称：
Arsenic in the Environment
摘要：
Hunan province of China is famous in the world for its plenty of non-ferrous metal ore (tungsten, bismuth, realgar) deposit. In the past several decades, intensive mineral exploitation, ore extraction, and refining activities has caused a large amount of waste such as mining waste water, together with the dumping of mining and smelting waste (arsenic residue, arsenic ash) on the soil surface and subjected to erosion and weathering processes, greatly affected the surrounding area and causing long-term and severe impact on soil and water environment. Pollution of paddy fields by Arsenic caused a severe threat to human health in Hunan province, because rice is a staple food and could accumulates higher levels of As compared to other crops. In the present study, a novel Nano manganese oxide with higher reactivity and oxidation ability has been synthesized. Pot experiment combined with field application has been conducted to explorer the potential of alpha-MnO2 Nano manganese oxides for the remediation of As polluted paddy soil. Results turns out that the application of alpha-MnO2 Nano-flowers can effectively control the transportation and accumulation of arsenic from soil to rice.
关键词：
Acidithiobacillus ferriooxidans(At.f);Static Magnetic Field;Bioleaching;Strengthen
摘要：
Bioleaching was used in this paper to leach heavy metals from tailings;Static magnetic field was used to strengthen the leaching rate of heavy metal(such as As and Cu),under the conditions of magnetic
摘要：
The degradation and flocculation of tetracycline(TC) with nanoscale zerovalent iron(NZVI) modified by starch were investigated using batch experiments as a function of reactant concentration,p H,and i
会议论文集名称：
Environmental technology and resource utilization II: Selected, peer reviewed papers from the 2014 2nd International Conference on Renewable Energy and Environmental Technology (REET 2014), August 19-20, 2014, Dalian, China
关键词：
Acidthiobacillus ferrooxidans;Effect;Leaching rate;Static Magnetic Field
会议名称：
35th International Symposium on Remote Sensing of Environment (ISRSE35)
会议时间：
APR 22-26, 2013
会议地点：
Inst Remote Sensing & Digital Earth, Beijing, PEOPLES R CHINA
会议主办单位：
Inst Remote Sensing & Digital Earth
会议论文集名称：
IOP Conference Series-Earth and Environmental Science
摘要：
Vegetation phenology provides a relevant indicator of the response of terrestrial ecosystems to climate change. In this study, vegetation phenology measurements were extracted and the spatial distributions were investigated using time series SPOT/VGT NDVI datasets for eastern China. Four phenology measurements were analyzed: the start of the growing season (SOS), the end of the growing season (EOS), the length of the growing season (GSL) and the time of the peak NDVI. The SOS in the northern part of the study area occurred earlier than in the rest of the study area due to larger amounts of cropland. The EOS showed a strong latitudinal pattern, especially in the southern portion of the study area. The GSL also showed a clear spatial pattern along the latitudinal gradient from north to south. The time of peak NDVI did not show a spatial pattern along the latitudinal gradient, which is likely due to the influence of vegetation types and the types of farming systems. In addition, there were no significant correlations between longitude and the four phenology measurements. SOS does not correlate with latitude, longitude or altitude, but EOS, GSL and the time of peak NDVI all correlated with latitude and altitude.
摘要：
The Gannan region is the largest navel orange planting area in the world and has the largest production in China. However, about 5 million tons of navel orange waste (NOW) produced annually. NOW has a great environmental risk because of its high content of organic matter and moisture. Anaerobic digestion of NOW with high nitrogen content waste is a promising alternative to treat these wastes. The effect of swine manure (SM), waste active sludge (WAS) as co-substrates and different mixing ratio were examined in three batch-scale studies. In the first investigation, co-digestion of NOW with SM resulted low methane yield and high concentration of VFAs. In the second investigation, NOW was co-digested with WAS, the methane yield was improved by 260% when the mixing ratio of NOW to WAS (VS/VS) was shifted from 1:2 to 2:1. In the third investigation, the co-digestion of NOW with SM and WAS was conducted. Co-digestion of three substrates has higher methane yield than that of previous two studies, with the exception of equal amounts of NOW with co-substrates (mixing ratio of NOW to SM to WAS was 2:1:1). The highest methane yield of all experiments was 0.20 m3 kg-1VS added while the mixing ratio of NOW to SM to WAS was 1:2:1. It seemed to obtain stable digestion performance, the mixing ratio of co-substates to NOW should not be lower than 1:1. WAS was a better co-substrate than SM, as WAS was capable to supply more organic nitrogen to create positive synergistic effects.
摘要：
In this study, a chaotic analysis approach was applied to a time series composed of seismic moment of events occurred in mine of Dong Gaussian copper mine subordinate to Tong Ling Nonferrous Metals Group Co. In Anhui province, China. The chaotic attractor dimension and the largest lyapunov index were put forward to determine whether the seismic flow of rock is chaotic and the degree of chaos. The analysis of examples indicates the dynamics of the seismic flow of rock belong to the category of dissipative systems, which exhibit chaotic behavior.
摘要：
In this research, improved granulation based on partly hydration of red mud was combined with gelling materials. Nitrogen and phosphoric salt were added in during granulation. Soil samples were collected periodically to evaluate the changes of pH, Z-potential and enzymatic activities of urease, catalase and alkaline phosphatase of soil. And the correlations among them were analyzed. Increase of pH that was caused by strong alkali was slowed by applying of composite particles. Dissolved phosphorus greatly inhibited all enzymatic activities while reinforcing restoration.
作者机构：
[Zheng, Ruilun; Liu, Xiaoli; Chen, Qiuwen] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China.;[Tie, Baiqing; Chen, Zhe; Liu, Xiaoli] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Zeng, Zhaoxia] Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol, Changsha 410125, Hunan, Peoples R China.
会议名称：
35th IAHR World Congress(第三十五届国际水利学大会)
会议时间：
2013-9-8
会议地点：
成都
会议主办单位：
水利部
会议论文集名称：
35th IAHR World Congress(第三十五届国际水利学大会)论文集
关键词：
Paddy rice;Biochar;lime;Heavy metal non-point load;Hunan province mining area
摘要：
Biochar and lime has attracted tremendous research interests due to its ability of increasing some toxic heavy metal irons immobilization in soil. However, few studies focus on the effects of biochar and lime application on soluble heavy metal release from historically heavy metal contaminated soil to waterlogged paddy water and non-point loads with in situ field experiment. Two years study was conducted to evaluate Cd, Pb, As metal irons immobilization and non-point loads reduction effectiveness after rice, bean derived biochars and lime application into a historically multi-metal contaminated soil by in situ field experiment, in central Hunan province mining area. Results showed that, additions of biochar derived from rice and bean straw (20 t.hm(-2)) significantly increased soil pH by 0.6-1.1 units, while lime application (50kg.hm(-2)) has no obvious effect on pH. Rice biochar addition reduced soluble Cd, Pb concentration of paddy waterlogged water by 56-80%, 60-85% respectively, and bean biochar addition also caused soluble Cd, Pb reduction by 61-83%, 51-86% respectively, compared to control treatment. No obvious reduction efficiency of soluble Cd, Pb, As of paddy waterlogged water was observed after lime application comparing to control. However, rice and bean biochar addition obviously increased the soluble As concentration of paddy waterlogged water by30-84% and 19-84% respectively, but not for lime. Both rice and bean biochar application can significantly decreased non-point loads of Cd and Pb during natural rainfall runoff events, but significantly increased As non-point load than control and lime application, which maybe will cause potential water environment risk due to much soluble As irons release into aqueous phase.
作者机构：
[Zeng, Zhaoxia] Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol, Changsha 410125, Hunan, Peoples R China.;[Tie, Baiqing; Liu, Xiaoli] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Liu, Xiaoli; Chen, Qiuwen] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China.
会议名称：
35th IAHR World Congress(第三十五届国际水利学大会)
会议时间：
2013-9-8
会议地点：
成都
会议主办单位：
水利部
会议论文集名称：
35th IAHR World Congress(第三十五届国际水利学大会)论文集
关键词：
Agricultural watershed;Agricultural conservation management;SWAT model;Nitrogen;Black soil region
摘要：
Agricultural Conservation Management (ACM) is increasingly advocated to reduce losses of nutrition from farming lands, especially with agricultural watershed and subwatershed perspectives. Within agricultural watershed scale, different crop coverage has different nutrient precipitation runoff non-point source load properties because of their spatial topography heterogeneity and variable fertilization demands. The objective of this study was to assess the reduction efficiency of an ACM on nitrogen non-point source load from small agricultural watershed, in the black soil region, northeast of china, where present typical gentle hilly landscapes, using the Soil and Water Assessment Tool (SWAT). Results showed that SWAT model performed well in calculating runoff (E-NS=0.58), NO3-N (E-NS=0.47) and total N (E-NS=0.69) loads. The calibrated and validated model was used to evaluate the effects of spatial adjustment of crops plantation on NO3-N and total N loads through land use pattern scenario analysis according to crop different fertilization demand and surface runoff nitrogen loss characteristics. Result showed that crops plantation spatial adjustment as an effective ACM strategy can reduce NO3-N and total N loads by 9.5% and 10.7%, respectively. It was apparent that within small watershed scale, crops plantation spatial regulation according to their fertilizer demand, nutrition loads properties and locations as an ACM can effectively decrease non-point source pollution from agricultural watershed, and can provide useful information for targeted water quality management for surface runoff receptor water body.
