检索结果-南通市图书馆

Polyaspartic acid mediates the absorption and translocation of mineral elements in tomato seedlings under combined copper and cadmium stress

引用

Journal of Integrative Agriculture 2019年第5期18卷 1130-1137页

作者： HU Mei-mei DOU Qiao-hui CUI Xiu-min LOU Yan-hong ZHUGE Yu-ping national engineering laboratory for efficient utilization of soil and fertilizer resources/College of resource and Environment Shandong Agricultural University

Polyaspartic acid(PASP)is a nontoxic,biodegradable,environmentally friendly polymer and is widely used as a fertilizer synergist in agricultural *** many old orchards and vegetable gardens,highly fertile soil is often accompanied by severe heavy metal *** present study was designed to investigate mineral element interactions mediated by PASP under copper(Cu)+cadmium(Cd)combined stress to provide reasonable suggestions for scientific fertilization.A pot experiment was conducted in which tomato seedlings served as plant materials.A concentration of 700 mgPASP and foliar spraying application methods were selected based on previous *** treatments were applied:normal soil(control(CK)),Cu+Cd(combined stress),Cu+Cd+PASP,and normal soil+*** plant biomass,root activity,and mineral elements were measured,and these data were analyzed by Data Processing System(DPS)statistical *** results showed that,under Cu+Cd combined stress,PASP promoted stem diameter growth,root activity and chlorophyll content and ultimately increased the biomass of tomato seedlings to different ***,the content of both Cu and Cd and their individual accumulation in plants *** increased the distribution of Cu and Cd in the roots under Cu+Cd combined stress,and the translocation ability from the roots to shoots was significantly *** respect to essential elements,PASP promoted mainly the absorption and translocation of potassium(K),calcium(Ca),and magnesium(Mg),which greatly exerted physiological ***,the variation trends of Cu and Cd under normal soil conditions contrasted with those under stress *** respect to essential elements other than K,Ca,and Mg,PASP mostly restrained their absorption but promoted their *** regulatory mechanism of PASP differed between the combined stress conditions and normal soil *** the combined stress conditions,PASP seemed to mainly promote these

关键词： tomato seedlings polyaspartic acid Cu+Cd combined stress

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Nitrate leaching of winter wheat grown in lysimeters as affected by fertilizers and irrigation on the North China Plain

引用

Journal of Integrative Agriculture 2015年第2期14卷 374-388页

作者： GU Li-min LIU Tie-ning ZHAO Jun DONG Shu-ting LIU Peng ZHANG Ji-wang ZHAO Bin State Key laboratory of Crop Biology College of Agronomy/National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources Shandong Agriculture University

Proper application of nitrogen（N） fertilizers and irrigation management are important production practices that can reduce nitrate leaching into groundwater and improve the N use efficiency（NUE）. A lysimeter/rain shelter facility was used to study effects of the rate of N fertilization, type of N fertilizer, and irrigation level on key aspects of winter wheat production over three growing seasons（response variables were nitrate transport, N leaching, and NUE）. Results indicated that nitrate concentration in the soil profile and N leaching increased with the rate of N fertilization. At the end of the third season, nitrate concentration in the top 0–75 cm layer of soil was higher with manure treatment while urea treatments resulted in higher concentrations in the 100–200 cm layer. With normal irrigation, 3.4 to 15.3% of N from applied fertilizer was leached from the soil, yet no leaching occurred under a stress irrigation treatment. The manure treatment experienced less N leaching than the urea treatment in all cases except for the 180 kg N ha^-1 rate in 2011–2012（season 3）. In terms of grain yield（GY）, dry matter（DM） or NUE parameters, values for the manure treatment were lower than for the urea treatment in 2009–2010（season 1）, yet were otherwise higher for urea treatment in season 3. GY and crop nitrogen uptake（NU） were elevated when the rate of N fertilizer increased, while the NUE decreased; GY, DM, and NU increased with the amount of irrigation. Data indicated that reduced rates of N fertilization combined with increased manure application and proper irrigation management can lower nitrate levels in the subsoil and reduce potential N leaching into groundwater.

关键词： fertilization irrigation nitrate vertical transport nitrogen leaching nitrogen use efficiency manure lysimeter

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effects of Exogenous Nitric Oxide and 24-Epibrassinolide on the Physiological Characteristics of Peanut Seedlings Under Cadmium Stress

引用

Pedosphere 2019年第1期29卷 45-59页

作者： DONG Yuanjie CHEN Weifeng BAI Xiaoying LIU Fengzhen WAN Yongshan College of resources and Environment National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Shandong Agricultural University College of Agronomic Sciences Shandong Agricultural University

Cadmium(Cd) is highly toxic to plants, animals, and humans. Limited information is available on the role of nitric oxide(NO)and/or 24-epibrassinolide(EBR) in response of plants to Cd stress. In this study, a hydroponic experiment was performed to investigate the effects of NO and/or EBR on peanut plants subjected to Cd stress(200 μmol L^(-1)) with sodium nitroprusside(SNP, an exogenous NO donor)(250 μmol L^(-1)) and/or EBR(0.1 μmol L^(-1)) addition. The results showed that Cd exposure inhibited plant growth, and this stress was alleviated by exogenous NO or EBR, and especially the combination of the two. Treatment with Cd inhibited the growth of peanut seedlings, decreased chlorophyll content, and significantly increased the Cd concentration in plants. Furthermore, the concentration of reactive oxygen species(ROS) markedly increased in peanut seedlings under Cd stress, resulting in the accumulation of malondialdehyde(MDA) and proline in leaves and roots. Under Cd stress, applications of SNP, EBR, and especially the two in combination significantly reduced the translocation of Cd from roots to leaves, increased the chlorophyll content, decreased the concentrations of ROS, MDA, and proline, and significantly enhanced the activities of superoxide dismutase(SOD), peroxidase(POD), and catalase(CAT) in peanut seedlings. Exogenous NO and/or EBR also stimulated the activities of nitrate reductase(NR)and nitric oxide synthase(NOS) and increased the contents of antioxidants, such as ascorbic acid(AsA) and reduced glutathione(GSH). Furthermore, exogenous NO and/or EBR enhanced Cd accumulation in the cell wall and thus decreased Cd distribution in the organelles in the roots. The concentrations of calcium(Ca), iron(Fe), magnesium(Mg), and zinc(Zn) were also regulated by exogenous NO or EBR, and especially by the two in combination. These results indicated that SNP and EBR, alone and particularly in combination, can mitigate the negative effects of Cd stress in peanut plants.

关键词： antioxidant system cadmium toxicity cadmium translocation cadmium uptake heary metal mineral element sodium nitroprusside

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Regulation of Calcium on Peanut Photosynthesis Under Low Night Temperature Stress

引用

Journal of Integrative Agriculture 2013年第12期12卷 2172-2178页

作者： LIU Yi-fei HAN Xiao-ri ZHAN Xiu-mei YANG Jin-feng WANG Yu-zhi SONG Qiao-bo CHEN Xin national engineering laboratory for efficient utilization of soil and fertilizer resources/Biochar engineering Technology Research Center of Liaoning Province/College of Land and Environment Shenyang Agricultural University

The effects of different levels of CaCl 2 on photosynthesis under low night temperature（8°C） stress in peanuts were studied in order to find out the appropriate concentration of Ca2＋through the artificial climate chamber potted culture *** results indicated that Ca2＋,by means of improving the stomatal conductivity of peanut leaves under low night temperature stress,may mitigate the decline of photosynthetic rate in the peanut *** regulation with 15 mmol L-1CaCl 2（Ca15） was the most effective,compared with other ***,the improvement of Ca2＋on peanut photosynthesis under low night temperature stress was validated further through spraying with Ca15,Ca2＋chelator（ethylene glycol bis（2-aminoethyl） tetraacetic acid; EGTA） and calmodulin antagonists（trifluonerazine; TFP）.And CaM（Ca2＋-modulin） played an important role in the nutritional signal transduction for Ca2＋mitigating photosynthesis limitations in peanuts under low night temperature stress.

关键词： peanut Ca2+ low night temperature stress photosynthesis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Comparative proteomic analysis provides new insights into ear leaf senescence of summer maize(Zea mays L.) under fi eld condition

引用

Journal of Integrative Agriculture 2016年第5期15卷 1005-1016页

作者： WEI Shan-shan WANG Xiang-yu LIU Peng ZHANG Ji-wang ZHAO Bin DONG Shu-ting State Key laboratory of Crop Biology/national engineering laboratory for efficient utilization of soil and fertilizer resources/College of Agronomy Shandong Agricultural University Tai'an 271018 P.R. China

As the most important organ in plant photosynthesis, the leaf plays an important role in plant growth and development. Leaf senescence is associated with fundamental changes in the proteome. To research the molecular mechanisms of leaf senescence, protein expression in senescing maize ear leaves grown under field conditions was analyzed using two-dimensional gel electrophoresis and matrix-assisted laser desorption/ionisation time-of-flight/time-of-flight mass spectrometry（MALDI-TOF/TOF MS）. A total of 60 senescence-associated proteins were identified. The identified proteins are involved in many biological processes, especially energy, metabolism and protein synthesis. Several of the identified proteins have not been previously reported as senescence-associated, including glycine-rich RNA-binding protein.

关键词： maize (Zea mays L.) ear leaf proteomics senescence

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Mechanisms of Exogenous Nitric Oxide and 24-Epibrassinolide Alleviating Chlorosis of Peanut Plants Under Iron Deficiency

引用

Pedosphere 2018年第6期28卷 926-942页

作者： SONG Yiling DONG Yuanjie TIAN Xianyi WANG Wanwan Zhenli HE College of resources and Environment National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Shandong Agricultural University Indian River Research and Education Center Institute of Food and Agricultural Sciences University of Florida

Iron(Fe) is a crucial transition metal for all living organisms including plants; however, Fe deficiency frequently occurs in plant because only a small portion of Fe is bioavailable in soil in recent years. To cope with Fe deficiency, plants have evolved a wide range of adaptive responses from changes in morphology to altered physiology. To understand the role of nitric oxide(NO) and 24-epibrassinolide(EBR) in alleviating chlorosis induced by Fe deficiency in peanut(Arachis hypogaea L.) plants, we determined the concentration of chlorophylls, the activation, uptake, and translocation of Fe, the activities of key enzymes, such as ferric-chelate reductase(FCR),proton-translocating adenosine triphosphatase(H^+-ATPase), and antioxidant enzymes, and the accumulation of reactive oxygen species(ROS) and malondialdehyde(MDA) of peanut plants under Fe sufficiency(100 μmol L^(-1)ethylenediaminetetraacetic acid(EDTA)-Fe) and Fe deficiency(0 μmol L^(-1)EDTA-Fe). We also investigated the production of NO in peanut plants subjected to Fe deficiency with foliar application of sodium nitroprusside(SNP), a donor of NO, and/or EBR. The results showed that Fe deficiency resulted in severe chlorosis and oxidative stress, significantly decreased the concentration of chlorophylls and active Fe, and significantly increased NO production. Foliar application of NO and/or EBR increased the activity of antioxidant enzymes, superoxide dismutase,peroxidase, and catalase, and decreased the ROS and MDA concentrations, thus enhancing the resistance of plants to oxidative *** of NO also significantly increased Fe translocation from the roots to the shoots and enhanced the transfer of Fe from the cell wall fraction to the cell organelle and soluble fractions. Consequently, the concentrations of available Fe and chlorophylls in the leaves were elevated. Furthermore, the activities of H^+-ATPase and FCR were enhanced in the Fe-deficient plants. Simultaneously,there was a significant in

关键词： active iron antioxidant enzyme subcellular structure chlorophyll oxidative stress reactive oxygen species sodium nitroprusside

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Dynamic Relationship Between Biologically Active soil Organic Carbon and Aggregate Stability in Long-Term Organically Fertilized soils

引用

Pedosphere 2012年第5期22卷 616-622页

作者： LI Cheng-Liang XU Jiang-Bing HE Yuan-Qiu LIU Yan-Li FAN Jian-Bo College of resources and Environment Shandong Agricultural UniversityTai'an 271018(China) Institute of soil Science Chinese Academy of SciencesNanjing 210008(China) national engineering laboratory for efficient utilization of soil and fertilizer resources Tai'an 271018(China)

Biologically active soil organic carbon （BASOC） is an important fraction of soil organic carbon （SOC）, but our understanding of the correlation between BASOC and soil aggregate stability is limited. At an ecological experimental station （28° 04＇-28° 37＇ N, 116° 41＇-117° 09＇ E） in Yujiang County, Jiangxi Province, China, we analyzed the dynamic relationship between soil aggregate stability and BASOC content over time in the red soil （Udic Ferrosols） fertilized with a nitrogen-phosphorus-potassium chemical fertilizer （NPK） without manure or with NPK plus livestock manure or green manure. The dynamics of BASOC was evaluated using CO2 efflux, and soil aggregates were separated according to size using a wet-sieving technique. The soils fertilized with NPK plus livestock manure had a significantly higher content of BASOC and an improved aggregate stability compared to the soils fertilized with NPK plus green manure or NPK alone. The BASOC contents in all fertilized soils decreased over time. The contents of large aggregates （800-2 000 μm） dramatically decreased over the first 7 d of incubation, but the contents of small aggregates （〈 800 μm） either remained the same or increased, depending on the incubation time and specific aggregate sizes. The aggregate stability did not differ significantly at the beginning and end of incubation, but the lowest stability in all fertilized soils occurred in the middle of the incubation, which implied that the soils had a strong resilience for aggregate stability. The change in BASOC content was only correlated with aggregate stability during the first 27 d of incubation.

关键词： aggregate size CO2 release manure mean weight diameter organic fertilization

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Microscale heterogeneity of soil bacterial communities under long-term fertilizations in fluvo-aquic soils

引用

soil Ecology Letters 2022年第4期4卷 337-347页

作者： Haojie Feng Hong Pan Chengliang Li Yuping Zhuge national engineering laboratory for efficient utilization of soil and fertilizer resources College of Resources and EnvironmentShandong Agricultural UniversityTaian 271018China

Differently sized soil aggregates,with non-uniform distribution of space and nutrients,provide spatially heterogeneous microenvironments for microorganisms and are important for controlling microbial community ecology and biogeochemistry in ***,we investigated the prokaryotic communities within different aggregate-size fractions:macroaggregate(>0.25 mm),microaggre-gate(0.053–0.25 mm)and silt+clay(soils under 39-year fertilization strategies:no fertilizer(CK),chemical fertilizer(NPK),manure fertilizer(M),and combination of manure and chemical fertilizers(MNPK).The results showed that the proportion of macroaggregate,soil aggregate-associated organic carbon(SOC)content and aggregate stability were all significantly increased by both manure and chemical *** fertilizations(M and MNPK)more effectively boosted formation and stability of macroaggregates and enhanced SOC concentration than *** distribution patterns of microorganisms in aggregates were primarily shaped by fertilization and aggregate *** explained 76.9%of the variance in bacterial community ***,especially with organic fertilizers primarily transitioned bacterial communities from slow-growing oligotrophic groups(e.g.,Chloroflexi)dominance to fast-growing copiotrophic groups(e.g.,Proteobacteria and Bacteroidetes)dominance across all aggregate *** possessed a more stable bacterial community and efficiency of resource transfer,while smaller aggregates increased antagonism and weakened mutualism among bacterial ***,combination of manure and chemical fertilizers was crucial for increasing SOC content and aggregation,leading to a clear shift in bacterial community structures at aggregate scale.

关键词： Bacterial community soil aggregate Long-term fertilization soil organic carbon(SOC)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of sulfamethazine on the horizontal transfer of plasmid-mediated antibiotic resistance genes and its mechanism of action

引用

Journal of Environmental Sciences 2023年第5期127卷 399-409页

作者： Xiaojing Yan Wenwen Liu Shengfang Wen Lanjun Wang Lusheng Zhu Jun Wang Young Mo Kim Jinhua Wang national engineering laboratory for efficient utilization of soil and fertilizer resources Key Laboratory of Agricultural Environment in Universities of ShandongCollege of Resources and EnvironmentShandong Agricultural UniversityTai’an 271018China Department of Civil and Environmental engineering Hanyang UniversitySeongdong-guSeoul 04763Korea

As a new type of environmental pollutant,antibiotic resistance genes(ARGs)pose a huge challenge to global *** gene transfer(HGT)represents an important route for the spread of *** widespread use of sulfamethazine(SM2)as a broad-spectrum bacteriostatic agent leads to high residual levels in the environment,thereby increasing the spread of ***,we chose to study the effect of SM2 on the HGT of ARGs mediated by plasmid RP4 from Escherichia coli(***)HB101 to *** NK5449 as well as its mechanism of *** results showed that compared with the control group,SM2 at concentrations of 10 mg/L and 200 mg/L promoted the HGT of ARGs,but transfer frequency decreased at concentrations of 100 mg/L and 500 mg/*** transfer frequency at 200 mg/L was 3.04×10^(−5),which was 1.34-fold of the control *** mechanism of SM2 improving conjugation transfer is via enhancement of the mRNA expression of conjugation genes(trbBP,trfAP)and oxidative stress genes,inhibition of the mRNA expression of vertical transfer genes,up regulation of the outer membrane protein genes(ompC,ompA),promotion of the formation of cell pores,and improvement of the permeability of cell membrane to promote the conjugation transfer of plasmid *** results of this study provide theoretical support for studying the spread of ARGs in the environment.

关键词： Sulfamethazine Plasmid Antibiotic resistance gene Conjugation transfer

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of biochar applied with plant growth-promoting rhizobacteria(PGPR)on soil microbial community composition and nitrogen utilization in tomato

引用

Pedosphere 2021年第6期31卷 872-881页

作者： Yuan WANG Wenqing LI Binghai DU Hanhao LI national engineering laboratory for efficient utilization of soil and fertilizer resources Tai'an 271018(China) College of resources and Environment Shandong Agricultural UniversityTai'an 271018(China) College of Life Sciences Shandong Agricultural UniversityTai'an 271018(China)

Plant growth-promoting rhizobacteria(PGPR)represent an important microbial community group and have beneficial effects on plant growth and development.A pot experiment was conducted to study the effect of biochar applied with PGPR on the soil microbial community composition and nitrogen use efficiency(NUE)of tomato,which could provide a theoretical basis for rational *** treatments were designed:no nitrogen(N),PGPR,or biochar control(CK);biochar without N or PGPR(BCK);N without PGPR or biochar(U);N and PGPR without biochar(UP);N and biochar without PGPR(UB);and N,PGPR,and biochar(UBP).The tomato yield in the UP treatment was 9.09% lower than that in the U treatment,whereas that in the UB treatment was 19.93% higher than that in the U *** tomato yield in the UBP treatment was 32.45%,45.69%,and 10.44% higher than those in the U,UP,and UB treatments,*** combined with PGPR increased the relative abundance of Nitrospira and Bradyrhizobium in the *** the tomato maturity stage,the soil NO_(3)^(-)-N content in the UBP treatment was 87.12%,88.12%,and 31.04% higher than those in the U,UP,and UB treatments,*** NUE in the UP treatment was 4.03% lower than that in the U treatment,and that in the UBP treatment was 13.63%,17.66%,and 10.77% higher than those in the U,UP,and UB treatments,*** study showed that biochar combined with PGPR can improve soil microbial community structure and increase the NUE of tomato.

关键词： biological fertilizer microbial community structure nitrogen cycling nitrogen use efficiency tomato yield

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：