检索结果-南通市图书馆

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2005年第3期6卷 155-157页

作者： dARBAN d.A. GOWEN S.R PEMBROKE B. MAHAR A.N department of Agriculture School of Agriculture Policy and development The University of Reading UK Department of Agriculture School of Agriculture Policy and Development The University of Reading UKDepartment of Agriculture School of Agriculture Policy and Development The University of Reading UKDepartment of Agriculture School of Agriculture Policy and Development The University of Reading UK

Growth room and glasshouse experiment was conducted to investigate the effect of constant and fluctuating tem- peratures on the development of Pasteuria penetrans a hyperparasite of root-knot nematodes. Tomato plants (Lycopersicon es- culentum Mill) were inoculated with Meloidogyne javanica second-stage juveniles attached with endospores of P. penetrans and were grown in growth room at 26?29 °C and in glasshouse at 20?32 °C. The tomato plants were sampled from the growth room after 600 degree-days based on 17 °C/d, accumulating each day above a base temperature of 10 °C and from the glasshouse after 36 calendar days. Temperature affected the development of P. penetrans directly. The rate of development at constant temperature in growth room was faster than that in the glasshouse at fluctuating temperatures.

关键词：温室温度 Pasteuria penetrans 重寄生物根癌线虫番茄

Surface‑applied or incorporated biochar and compost combination improves soil fertility,Chinese cabbage and papaya biomass

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Biochar 2021年第2期3卷 213-227页

作者： Justine Cox Nguyen V.Hue Amjad Ahmad Kent d.Kobayashi Tropical Plant and Soil Sciences University of Hawaii3190 Maile WayHonoluluHI 96822USA Present Address:NSW department Primary Industries 1243 Bruxner HighwayWollongbarNSW 2477Australia

Many Hawaiian agricultural soils are acidic with low-nutrient retention;therefore,organic soil amendments are often used to improve soil properties and increase *** can be incorporated for annual crops,but perennial orchards need surface application to avoid damaging surface *** trials compared responses to incorporated(IBC)or surface-applied(SBC)combination of hardwood biochar and chicken manure compost(4%v/v of each amendment)added to an Andisol and *** pH was increased by 0.4-1.1 units in IBC and by 0.2-0.5 for SBC in the 0-10 cm soil *** SBC and IBC increased soil total N,extractable P,Ca and Mg in the 0-10 cm soil *** pH,total C and extractable Ca were also higher in the 10-20 cm soil layer for IBC soil,indicating movement and/or leaching of *** cabbage biomass was 18-70%higher in the IBC and 14-47%higher in the SBC than that in the unamended soil,while papaya biomass was 23%and 19%higher in SBC and IBC,*** was a greater response in the more acidic Andisol soil,with larger improvements in soil pH,plant nutrient uptake and.root biomass than the *** application was as effective in increasing plant growth as the incorporated amendment,providing evidence for farm scale *** and compost are recommended for use in tropical soils,and surface application may be beneficial to annual and perennial crops.

关键词： Surface-applied Andisol Oxisol Carica papaya Brassica rapa chinensis Biochar

China＇s Macroeconomic Outlook and Risk Assessment： Counterfactual Analysis, Policy Simulation, and Long-Term Governance- A Summary of Annual Report （2015-2016）

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Frontiers of Economics in China-Selected Publications from Chinese Universities 2016年第2期11卷 173-191页

作者： Kevin X. d. Huang Guoqiang Tian department of Economics Vanderbilt University Nashville TN 37235-1819 USA Institute for Advanced Research (IAR) Shanghai University of Finance and Economics (SUFE) Shanghai 200433 China School of Economics and Institute for Advanced Research (IAR) Shanghai University of Finance and Economics (SUFE) Shanghai 200433 China department of Economics Texas A&M University College Station TX 77843 USA

Abstract This summary report highlights the confluence of continued downward pressures and deflation scares in the face of looming uncertainty in China＇s key macroeconomic landscapes. Counterfactual analyses and policy simulations are conducted, in addition to benchmark forecasts, based on IAR-CMM model and taking into account both cyclical and secular factors. Economic deceleration is projected to continue in the short to medium term, with real GdP growth declining to 6.3% （5.5% using more reliable instead of official data） in 2016 and facing a significant risk of sliding further down in 2017. Five key factors contributing to the weak outlook, additional to frictions and impediments associated with economic transition/restructuring and lackluster domestic/external demands, are identified, including： lack of new growth/ development engine, exhaustion of government-led driving force, the crowding-out of private sectors by state-owned enterprises （SOEs） with excess capacity／capital overhang, nonperforming government sectors and officials, and twist or misinterpretation of the ＂New Normal.＂ A root cause of these problems, lying with sluggishness in China＇s transformation into a market based economy, has to do with overpowered government but underpowered market in resource allocation and government underperformance in enforcing integrity and transparency in the marketplace and in providing public goods and services. At the nexus between inclusive growth and institutional transformation are market oriented and rule of law governed structural reforms and harmonious development. As such, fundamental institutional reforms that dialectically balance demand and supply side factors and properly weigh short run stabilization against long run development should be elevated to the top of the agenda.

关键词： macroeconomic forecast risk assessment policy simulation,alternative scenarios long-term governance

Recent developments to Mitigate Selenium deficiency in Agricultural Eco-Systems

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Phyton-International Journal of Experimental Botany 2022年第5期91卷 915-927页

作者： Misbah Naz Rubab Shabbir Krishan KVerma Anshu Rastogi Vishnu d.Rajput Talha Javed Muhammad Ammar Raza Kainat Asif Muhammad Aamir Iqbal Muhammad Imran Mohammad Sohidul Islam Khalid Rehman Hakeem MehmetFirat Baran Ayman EL Sabagh Institute of Environment and Ecology School of the Environment and Safety Engineering Jiangsu UniversityZhenjiang21201China College of Agriculture Fujian Agriculture and Forestry UniversityFuzhou350002China Chinese Academy of Agricultural Sciences Nanning530007China Laboratory of Bioclimatology Department of Ecology and Environmental ProtectionPoznan University of Life SciencesPoznań60-649Poland Academy of Biology and Biotechnology Southern Federal UniversityRostov-on-Don344006Russia department of Agronomy University of AgricultureFaisalabad38040Pakistan College of Food Science and Biotechnology Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang ProvinceZhejiang Gongshang UniversityHangzhou310018China department of Soil and Environmental Science University of AgricultureFaisalabad38000Pakistan department of Agronomy Faculty of AgricultureUniversity of Poonch RawalakotRawalakot12350Pakistan department of Entomology Faculty of AgricultureUniversity of Poonch RawalakotRawalakot12350Pakistan department of Agronomy Hajee Mohammad Danesh Science and Technology UniversityDinajpur5200Bangladesh department of Biological Sciences Faculty of ScienceKing Abdulaziz UniversityJeddah22233Saudi Arabia Princess dr.Najla Bint Saud Al-Saud Center for Excellence Research in Biotechnology King Abdulaziz UniversityJeddah21589Saudi Arabia department of Biosystem Engineering Faculty of AgricultureSiirt UniversitySiirt56220Turkey Faculty of Agriculture Department of Field CropsSiirt UniversitySiirt56100Turkey department of Agronomy Faculty of AgricultureKafrelsheikh UniversityKafrelsheikh33156Egypt Seed Science and Technology University of Agriculture FaisalabadFaisalabad38040Pakistan

Under changing climate,trace elements like selenium(Se)have emerged as vital constituent of agro-ecosystems enabling crop plants to off-set the adverse effects of suboptimal growth *** available form of selenium is important for boosting its bioavailability to crop plants having varied agro-botanical traits and.root architectural *** compared to selenite,the selenate has a weaker soil bonding,higher absorption in the soil solution which results in a comparatively absorption by plant *** factors including dry climate,high pH,optimal ambient air temperature,less accumulation of water,and low concentration of organic matter in the soil tend to boost the selenate ratio in the *** use of selenium pelleted seeds has emerged as an interesting and viable alternative to alleviate selenium deficiency in agricultural ***,the co-inoculation of a mixture of Selenobacteria and Arbuscular mycorrhizal fungi represents an evolving promising strategy for the bio-fortification of wheat plants to produce selenium-rich flour to supplement human dietary ***,in-depth research is required to assure the effectiveness of biological fertilization procedures in field conditions as well as to explore and increase our understanding pertaining to the underlying main mechanisms and channels of selenium absorption in *** focus of this review is to synthesize the recent developments on Se dynamics in soil-plant systems and emerging promising strategies to optimize its levels for crop *** developments regarding the use of micro-organisms as a biotechnological mean to enhance plant nutrition and crop quality have been objectively *** study becomes even more pertinent for arid and semi-arid agro-ecosystems owing to the potential role of selenium in providing stress tolerance to crop ***,this review synthesizes and summarizes the recent developments on climate change and bioavailability,and the prote

关键词： Abiotic stresses bioavailability selenate selenite climate change sustainable agriculture

Tropical cyclone track and intensity prediction skill of GFS model over NIO during 2019&2020

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Tropical Cyclone Research and Review 2022年第1期11卷 36-49页

作者： Ch.Sridevi d.R.Pattanaik A.K.das Akhil Srivastava V.R.durai C.J.Johny Medha deshpande P.Suneetha Radhika Kanase India Meteorological department Numerical Weather Prediction DivisionLodhi RoadNew Delhi110003India Indian Institute of Tropical Meteorology MoESPune411008India dept of Meteorology and Oceanography Andhra UniversityVisakhapatnamAndhra Pradesh530003India

The Tropical Cyclone(TC)track prediction using different NWP models and its verification is the critical task to provide prior knowledge about the model errors,which is beneficial for giving the model guidance-based real-time cyclone warning *** study has attempted to verify the Global Forecast System(GFS)model forecasted tropical cyclone track and intensity over the North Indian Ocean(NIO)for the years 2019 and *** is one of the operational models in the India Meteorological department(IMd),which provides the medium-range weather forecast up to 10 *** forecasted tracks from the GFS forecast are obtained using a vortex tracker developed by Geophysical Fluid dynamics Laboratory(GFdL).A total of 13 tropical cyclones formed over the North Indian Ocean,eight during 2019 and five in 2020 have been considered in this *** accuracy of the model predicted tracks and intensity is verified for five days forecasts(120 h)at 6-h intervals;the track errors are verified in terms of direct Position Error(dPE),Along Track Error(ATE)and Cross-Track Error(CTE).The annual mean dPE over NIO during 2019(51–331 km)is lower than 2020(82–359 km),and the dPE is less than 150 km up to 66 h during 2019 and 48 h during *** positive ATE(76–332 km)indicates the predicted track movement is faster than the observed track during both *** positive CTE values for most forecast lead times suggest that the predicted track is towards the right side of the observed track during both *** cyclone Intensity forecast for the maximum sustained wind speed(Max WS)and central mean sea level pressure(MSLP)are verified in terms of mean error(ME)and.root mean square error(RMSE).The errors are lead time ***,most of the time model under-predicted the cyclone intensity during both ***,there is a significant variance in track and intensity errors from the cyclone to cyclone and Bay of Bengal basin to the Arabian Sea basin.

关键词： Tropical cyclone Track prediction GFS NWP Global model GFdL

Nodulation and molecular characterization of pure culturesisolated from root nodules of Coriaria nepalensis

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Chinese Science Bulletin 1998年第8期43卷 695-698页

作者： Chuanjiong Hu Pingzhen Zhou Qi Zhou Huakui Chen A. d. L. Akkermans Huazhong Agr Univ Coll Life Sci & Technol Wuhan 430062 Peoples R China Chinese Acad Agr Sci Inst Oil Crops Wuhan 430062 Peoples R China Agr Univ Wageningen Dept Microbiol NL-6703 CT Wageningen Netherlands

Four strains with typical morphology of actinomycete genus of Frankia were isolated from root nodules of Coriaria nepalensis. They were shown to nodulate the seedlings of host plant and hybridize with Frankia 16S rRNA targeted oligonucleotide probes, indicating that they did belong to the genus Frankia. Furthermore, by nifHdK probe hybridizations, the homologous fragments of nifHdK genes were detected among the bacteria, and they were located in various sizes of restriction fragments of total dNA, showing diverse patterns of restriction fragment length polymorphisms of nifHdK gene (nifHdK_RFLPs). The PCR_based amplification and cloning of nifH gene throw light on the molecular phylogeny of Coriaria_infective Frankia.

关键词： Frankia Coriaria nepalensis nodulation molecular characterization.

Signaling at the root Surface： The Role of Cutin Monomers in Mycorrhization

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Molecular Plant 2013年第5期6卷 1381-1383页

作者： Jeremy d. Murray donna R. Cousins Kirsty J. Jackson Chengwu Liu Cell and developmental Biology John Innes Centre Norwich NR4 7UH UK

Most vascular plants interact with arbuscular mycorrhizal fungi （AMF） and are thereby provided significant advantages in nutrient acquisition, especially phosphate. The widespread retention of this symbiosis in vascular plants is testament to its importance and ancient origins. This highlight focuses on the reports of two of the first genes identified through for- ward genetic screens for AMF symbiotic mutants： Required for Abuscular Mycorrhization 1 （RAM1） and RAM2, which respectively encode a GRAS transcription factor and a glyc- erol-3-phosphate acyl-transferase （GPAT） that are required for the formation of fungal entry structures （hyphopodia） on the root surface.

关键词： arbuscular mycorrhizal irst genes identified genetic screens

Soil fungal and prokaryotic community structure exhibits differential short-term responses to timber harvest in the Pacific Northwest

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Pedosphere 2020年第1期30卷 109-125页

作者： Rachel E.dANIELSON Megan L.MCGINNIS Scott M.HOLUB david d.MYROLd department of Crop and Soil Science Oregon State UniversityCorvallis OR 97331-7306(USA) United State Forest Service Helena-Lewis and Clark National Forest2880 Skyway DriveHelena MT 59602(USA) Weyerhaeuser Company PO Box 275Springfield OR 97477(USA) department of Land Airand Water ResourcesUniversity of CaliforniaDavis CA 95616USA

Conventional clear-cut timber harvest is a widespread industrial practice across the Pacific Northwest;however,information regarding how these practices impact soil microbial community structure at the regional scale is *** evidence of consistent and substantial impact of harvest on soil microbial functional profiles across the region(despite a range of environmental conditions),the objective of this study was to determine the extent to which harvest also influences the structure of prokaryotic and fungal soil microbial communities,and how generalized these trends are throughout the geographic *** soil samples were collected one year before and after harvest across nine second-growth douglas-fir forests in the Pacific *** community dNA was extracted from the soils,and high-throughput targeted gene sequencing of the 16 S r RNA gene for prokaryotes and the internal transcribed spacer(ITS)gene for fungi was *** diversity was consistently and significantly higher after harvest;it was moderately so for fungal communities(+14.6%),but only marginally so for prokaryotic communities(+2.0%).Similarly,on average,a greater proportion of the variation in the community structure of fungi(20.1%)at each site was associated with forest harvest compared to that of prokaryotes(13.2%).Overall,the greatest influence of timber harvest on soil microbial communities appeared to be a relative depletion of ectomycorrhizal fungi,with a concomitant enrichment of saprotrophic *** the short-term responses of soil microbial communities across the region,particularly those of tree root-associated symbionts,may aid our understanding of the role soil microbial communities play in ecological succession.

关键词： clear-cut douglas-fir forest ectomycorrhizal fungi forest soil microbial community microbial diversity root-associated symbiont saprotrophic fungi

Selection of effective and highly thermostable Bacillus subtilis lipase A template as an industrial biocatalyst-A modern computational approach

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Frontiers in Biology 2015年第6期10卷 508-519页

作者： B. Senthilkumar d. Meshachpaul Rao Sethumadhavan R. Rajasekaran School of Biosciences and Technology Bioinformatics Division VIT University Vellore 632014 Tamil Nadu India

Biocatalysts are intrinsically reactive and hence their operational stability is of vital significance for any bioprocess. The setback in biocatalyst stability has been tackled from diverse prospects. Inherently, stable biocatalysts are markedly realized and a regular attempt is being made to seek out new organisms that harbor them. Here, we analyzed the industrial biocatalyst lipase A （Native） of Bacillus subtilis and its six thermostable mutants （2M, 3M, 4M, 6M, 9M and 12M） computationally using conformational sampling technique. Consequently, the various structural events deciphering thermostability like root mean square deviation, root mean square fluctuation, radius of gyration and polar surface area showed mutant 12M to be highly stable with statistical validation. Besides, static model analysis involving intra-molecular interactions, secondary structure, solvent accessibility, hydrogen bond pattern, simulated thermal denaturation and desolvation energy also supported 12M comparatively. Of note, the presence of high secondary structural rigidity and hydrogen bonds increased thermostability and functionality of 12M, thus selecting it as a best template for designing thermostable lipases in future. Also, this study has a significant implication toward a better understanding of conformational sampling in enzyme catalysis and enzyme engineering.

关键词： thermophilic Bacillus subtilis lipase A conformational analysis docking

A New Compound from dalbergia odorifera T. Chen

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Chinese Chemical Letters 2000年第11期11卷 993-994页

作者： Wang W. Zhu Q.X. Huang M.H. Cheng d.L. department of Chemistry Natl. Lab. of Appl. Organ. Chemistry Lanzhou University Lanzhou 730000 China

A new compound, 2, 4-dihydroxy-5-methoxybenzophenone was isolated from the root and heartwood of dalbergia odorifera T. Chen.

关键词： Chen A New Compound from dalbergia odorifera T