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- Abstract：Nitric oxide(NO) plays an important role in diverse physiological processes in plants.Most abiotic stresses can induce its production in plant cell.Nitric oxide can promote the development and stress tolerance of plants at low concentrations,but is harmful at high concentrations.This review is focused on NO synthesis and its functions in plant responses to abiotic environmental stresses.Nitric oxide alleviates the harmfulness of reactive oxygen species,reacts with other signaling molecules and regulates the...3|2|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：The ERD genes(early responsive to dehydration) are a member of the genes expressed in response to dehydration-related environmental stresses.Levels of ERD are increased in response to low temperature,drought,or osmotic stress and ABA induced.Although the expression patterns and transcriptional regulation of ERD s have been well characterized,the biochemical function of these genes and their physiological role in plants during stress conditions are not fully understood.Studies are under way to evaluate which...2|2|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：The prion protein and the lipid raft proteins are the current emphases.The normal cellular prion protein,PrP C,may lead to the occurrence of the spongiform encephalopathy by its transconformation PrP Sc,the scrapie prion protein.However,the mechanism of how PrP C convert to PrP Sc is unclear until now.PrP C is an important signal transduction protein,triggering a serial of signal transduction events.The flotillins belongs to the newly-named SPFH(stomatin/prohibitin/flotillin/HflK/C)protein family,and it is ...0|2|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：The aim of this study was to regulate the polyamine-related genes transcription in mouse endometrial cell by ornithine decarboxylase(ODC) siRNA,ODC over-expression vector and ODC specific inhibitor-difluoromethylornithine(DFMO),and polyamine-related genes were detected by real-time PCR.Results showed that ODC siRNA led to an obvious increase of S-adenosylmethionine decarboxylase(SAMDC)(1.666 6 times and 3.036 6 times compared with control) and decrease of spermidine/spermine N1-acetyltransferase(SSAT) trans...2|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：Identification and discovering of valuable genes for complex traits contained in specific germplasm accessions is a key step in maize improvement.Forty BC 2F 2 populations derived from crosses between three recipient parents,Dan340,Ye478 and Qi319,and 34 donors of diverse origins were screened for drought tolerance.The results indicated that more than 50% of plants could not flower or silk under drought stress,and the anthesis silking interval(ASI) was less 6 days for most plants with satisfied fecundity.Al...0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：The relationship between temperature-solar condition and maize growth was studied by designing different sowing dates.Results showed that the grain yield of spring maize could be enhanced 17.6% by delaying sowing date from the end of April to the end of May.For the yield components,the advantage of sowing at the end of May was mainly observed for kernel number,which increased about 15.4%.Improvement of temperature and solar condition during middle-late grain-filling period is the main reason for yield incre...0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：The wheat variety,Mentana is a differential host for Puccinia striiformis f.sp.tritici.In order to analyze the resistant gene(s) and the genetic characteristic of the cultivars,classic genetics and allelic analysis were used to assay the number,recessive or dominance,interaction and inherited traits of the major genes in Mentana with a few races and examine differences between newly found resistant genes and the known genes.Positive cross result indicated that the resistance to Su-1 and 86036 was controlled...0|2|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：The fungicidal activity and disease control mechanism of tricyclazole against Colletotrichum lagenarium were studied.Results showed that tricyclazole had no direct inhibitory effect on growth,spore germination and appressoria formation of C.lagenarium.Direct inhibitory effect on melanin biosynthesis in C.lagenarium by tricyclazole was observed.But there was a marked difference between isolates in sensitivity of melaninization to tricyclazole.The minimum inhibition concentrations(MIC) for hyphal melanization...0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：An experiment was conducted to study the effects of cadmium chloride(Cd 2+) on the antioxidant enzyme activities of the Bellamya purificat,such as superoxide dismatase(SOD),catalase(CAT),glutathione S-transferase(GST),concentrations of glutathione(GSH) and malonyldialdehyde(MDA) at different concentrations(Cd 2+ : 0 mg/L,0.05,0.10,0.20 and 0.50 mg/L) and different exposure time(0-14 d).The results showed that Cd 2+ had significant influence on the concentrations of MDA and GSH,and enzymes activities of SOD,...0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：A study of soil microbial biomass carbon(SMB-C),microbial biomass nitrogen(SMB-N),and microbial biomass phosphorus(SMB-P) in arable soils with different fertilizer regimes was carried out based on a 15-year long term fertilizer experiment in a Fluvo-aquic soil in Beijing.Thirteen treatments were established in 1990.Six treatments were chosen for this work: Four were in a wheat-maize rotation receiving either no fertilizer(CK),mineral fertilizers(NPK),mineral fertilizers plus farmyard manure(NPKM) or mineral...0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：The objective was to study the storage effect of total mixed ration(TMR) wrapped by stretch film and the effect of baled TMR on milk production,milk composition,and blood indices of late lactation dairy cows.The moisture contents of the TMR were adjusted to 40%,50%,and 60%,respectively.Fresh TMR were wrapped and baled using stretch film.After 0,3,7,15,and 30 days storage,the nutrient content and fermentation quality were determined.The results demonstrated that the nutrient content increased compared with f...2|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：The genetic variation of mitochondrial DNA D-loop and origins of Bohai black cattle and Japanese black cattle were studied.The complete mitochondrial D-loop sequences of 17 individuals from the two cattle breeds were determined using the DNA sequencing technique.The same sequences of 31 Japanese Black,9 Bohai black,2 European Bos taurus,2 B.indicus and 21 other yellow cattle breeds in GenBank were also used in this study.All the sequences were aligned and analyzed using lasergene software and the UPGMA tree...3|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：Cytophaga and Sporocytophaga are capable of decomposing cellulose and utilizing cellulose as the only source of carbon in their growth.These highly specialized organisms have potential ability to be applied in exploiting non-general protein feeding as single cell protein.The protein and amino acids contents of cells of C.hutchinsonii and Sporocytophaga sp.were analyzed and the protein digestibility was detected by pepsin-trypsin two stage method in vitro.The Saccharomyces cerevisiae and Candida sp.were used...0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：This article reviewed the background and importance of variable spray technology and its study situation.The current situation showed that continued deep research on variable spray technology and its spray characteristics is necessary and significant in order to improve agricultural chemical efficacy and reduce environmental pollution.A set of evaluation methodology for studying variable spray characteristics was put forward to provide a reference method of systematic study on variable spray characteristics...0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：The seed-coating materials for Astragalus membranaceus were preliminarily developed with the aims at the agronomic traits of Astragalus membranaceus and the main problems in cultivation.The physical and chemical characters of seed coating materials were measured.The compositions included carbendazim,cream-fu,imidacloprid,trace elements,auxiliaries,methylene blue or acid red.The mixed proportion in mass was 15%,12%,8%,3%,15%,2% and 45%,respectively.The mixture was then emulsified and grinded.The product qual...0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：The changes of both dielectric constant and conductance were monitored with a parallel-plate electrodes during heating and storing soybean oil.Some quality parameters of acid value,peroxide value and color of soybean oil were measured with GB methods.The correlation between these values and dielectric characteristics of soybean oil was investigated.The results showed that dielectric constant and conductance were linearly correlated with acid value,peroxide value and color.The correlation coefficients were l...2|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：In order to develop low cost,high performance super Absorbent polymer(SAP),we used microwave radiation to synthesize multi-grafted starch of interpenetrating polymer network(IPN) structure.Based upon water Absorption,we investigated the polymerization conditions of SAP by starch,acrylic acid(AA),acrylic amide(AM),polyvinyl alcohol(PVA),and characterized the structure of the polymer through scanning electronic microscopy(SEM) and infrared spectra(FTIR).It was found that,under microwave radiation,the optimum ...0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：The purpose of the study is to compare the effects of different construction types and manual modulations of ventilation on environmental conditions of finishing pig houses.Two experiments were conducted.Summer experiment: 3 types of finishing pig houses with different construction types were chosen(named A,B,and C,respectively).The roofs are flat roof made of brick and tile for A,flat roof made of colored armor plate for B,and arch-shaped roof made of cement for C;the area ratio of south and north windows ...1|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：The purpose of this study is to determine the relative importance,the weight of seven main influencing factors of animal welfare by using Delphi method.The research methods include sending two rounds of survey forms,asking for and generalizing opinions from relevant experts and making calculation and analysis.The final results were shown that the environmental conditions of livestock houses had the greatest influence on animal welfare and the weight coefficient reaches 0.303 7;the second important influenci...0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：Research on land productivity is elaborated systematically.Focusing on the meaning,impact factor,evaluation methods and main content of land productivity,the study makes a brief comment.With the development of society and economy,and application of mathematical models and 3S technology,land productivity has achieved a comprehensive meaning,and its evaluation goes through a series of processes,from qualitative methods to quantitative methods,and from assisting the choice of land use patterns,regionalization ...0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：Agriculture in China is faced with scarcity of resources,environmental degradation and wastages of farm resources.Therefore,resource-conserving agriculture should be promoted actively.In this article,the basic concept of resource-conserving agriculture is expounded.Resource-conserving agriculture is an agricultural production system which focuses on conservation of farm resources or production inputs.Based on this concept,an index system for resource-conserving agriculture are established in order to evalua...0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：Information about agricultural external dependence in China has been sorted in this thesis.The main conclusion is that agricultural external dependence in China is below the world average level due to the low level of export dependence.But it also showed that corn industry in China is in relatively safe status.China has imported lots of farming produce for it lacks arable land and special resources,such as soybean.The reason of low export dependence of China agriculture is that its competitiveness mainly re...0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
