叶尔羌河流域长身高原鳅寄生线虫的感染情况及分布类型     

田胜利  郝翠兰  张文润  容梦婕  穆妮热·喀迪尔  冯龙基  高仕文  张航  岳城 《淡水渔业》2022,52(1):45-51

为了探明叶尔羌河流域长身高原鳅(Triplophysa tenuis)体内寄生线虫(Nematodes)的感染情况及分布类型,于2019年5月-2020年7月对叶尔羌河长身高原鳅进行3次采样,通过运用统计学方法对长身高原鳅感染线虫情况和分布类型进行分析.结果显示:在捕获的414尾长身高原鳅中共检出2种线虫,分别为杆咽线...  相似文献   

海藻糖在植物抗逆中的应用     

韦航  蒙健宗  邓军 《安徽农业科学》2009,37(20)

结合海藻糖的生物学功能,介绍海藻糖在植物抗逆中的应用。  相似文献   

安徽企业履行社会责任问题初探     

宋航 《安徽农业大学学报》2009,(2):16-19,136

作为中部重要省份的安徽省,其企业履行社会责任的情况如何对本省和全国经济发展有着重要意义。总结安徽各类型企业履行社会责任的现状及其在履行社会责任过程中出现的问题,提出普适性和针对性的对策,有助于加强企业社会责任感和推进和谐社会建设。  相似文献   

镜泊湖熔岩台地种子植物区系调查分析   总被引：2，自引：0，他引：2  

尹航  曲秀春  于爽  牛树奎 《东北林业大学学报》2009,37(3)

经野外调查,已知镜泊湖熔岩台地有野生种子植物81科270属493种,其中裸子植物1科1属1种,被子植物80科269属492种。本区地理成分比较复杂,属、种分别具有13个和22个分布区类型,均以温带成分占绝对优势：温带分布属188属,占总属数的84．68％;温带分布种394种,占总种数83．83％。  相似文献   

水稻耐寒育种研究进展     

杨川航  王开  杨航  周大宾  李建修 《勤云标准版测试》2009,29(6)

水稻冷害是一个长期威胁着包括中国在内的世界上许多国家粮食安全的重要问题.概述了水稻冷害的危害性及冷害的类型和发生机理,并对国内外水稻耐寒育种的理论研究和实践进行了详细回顾与总结,从几个方面重点阐述了中国水稻耐寒育种研究的理论方法与实践应用.结合水稻耐寒育种目前存在的局限探导了未来发展的策略,最后提出了今后在水稻耐寒育种领域的发展趋势.  相似文献   

Identification and location of Stb9, a gene for resistance to septoria tritici blotch in wheat cultivars Courtot and Tonic     

L. Chartrain  P. Sourdille  M. Bernard  J. K. M. Brown 《Plant pathology》2009,58(3):547-555

This study reports the discovery of a gene for resistance to septoria tritici blotch (STB) in two spring wheat cultivars, Courtot and Tonic. The gene, named Stb9 , confers resistance to Mycosphaerella graminicola isolate IPO89011. It was mapped by quantitative trait loci (QTL) analysis using an existing map of Courtot × Chinese Spring and was located between markers Xfbb226 (3·6 cM) and XksuF1b (9 cM) on the long arm of chromosome 2B. Markers linked to Stb9 in Courtot were then shown to be linked to resistance to IPO89011 in F₃ families of Tonic × Longbow. Allelism tests in which Tonic was crossed with Courtot confirmed that Tonic has a gene for resistance to IPO89011 at or very close to the Stb9 locus. SSR markers flanking Stb9 may be used in marker-assisted selection to introgress this gene into winter cultivars or in spring wheat breeding programmes outside Europe.  相似文献   

Potential for microbial diuron mineralisation in a small wine‐growing watershed: from treated plots to lotic receiver hydrosystem     

Stéphane Pesce  Fabrice Martin‐Laurent  Nadine Rouard  Bernard Montuelle 《Pest management science》2009,65(6):651-657

BACKGROUND: Since biological degradation processes are known to be a major driver of the natural attenuation of pesticide residues in the environment, microbial communities adapted to pesticide biodegradation are likely to play a key environmental role in reducing pesticide exposure in contaminated ecosystems. The aim of this study was to assess the diuron‐mineralising potential of microbial communities at a small‐scale watershed level, including a diuron‐treated vineyard (pollution source), its associated grass buffer strip (as a river protection area against pesticide runoff) and the lotic receiver hydrosystem (sediments and epilithon), by using radiorespirometry. RESULTS: Comparison of results obtained at different sampling sites (in both soil and aquatic systems) revealed the importance of diuron exposure in the adaptation of microbial communities to rapid diuron mineralisation in the vineyard but also in the contaminated grass strip and in downstream epilithic biofilms and sediments. CONCLUSION: This study provides strong suggestive evidence for high diuron biodegradation potential throughout its course, from the pollution source to the final receiving hydrosystem, and suggests that, after microbial adaptation, grass strips may represent an effective environmental tool for mineralisation and attenuation of intercepted pesticides. Copyright © 2009 Society of Chemical Industry  相似文献   

A refined lack‐of‐fit statistic to calibrate pesticide fate models for responsive systems     

Bernard T Nolan  Igor G Dubus  Nicolas Surdyk 《Pest management science》2009,65(12):1367-1377

BACKGROUND: Calibration by inverse modelling was performed with the MACRO transport and fate model using long‐term (>10 years) drainflow and isoproturon (IPU) data from western France. Two lack‐of‐fit (LOF) indices were used to control the inverse modelling: sum of squares (SS) and an alternative statistic called the vertical‐horizontal distance integrator (VHDI), which is designed to account for offsets in observed and predicted arrival times of peak IPU concentration. With these data, SS was artificially inflated because it is limited to comparison of predicted and observed IPU concentrations that are concurrent in time. The LOFs were used along with the index of agreement (d) and the correlation coefficient (r) to ascertain the fit of the calibrated models. RESULTS: Predicted arrival times of peak IPU concentration differed somewhat from observed times. All four indices indicated better model fit for the second of two validation periods when inverse modelling was controlled by VHDI rather than SS (SS = 26.4, d = 0.660, r = 0.606 and VHDI = 1.25). The VHDI statistic was markedly lower compared with the uncalibrated model (38.0) and SS calibration results (24.5). The final maximum predicted IPU concentration (44.5 µg L^?1) for the calibration period was very similar to the observed value (44 µg L^?1). CONCLUSION: VHDI is seen as an effective alternative to SS for calibration and validation of pesticide fate models applied to responsive systems. VHDI provided a more realistic assessment of model performance for the transient flows and short‐lived concentrations observed here, and also effectively substituted for the objective function in inverse modelling. Copyright © 2009 Society of Chemical Industry  相似文献   

Oral administration of Escherichia coli lipopolysaccharide enhances the immune system of striped catfish,Pangasianodon hypophthalmus (Sauvage)          下载免费PDF全文

Bui Thi Bich Hang  Phuong Thanh Nguyen  Patrick Kestemont 《Aquaculture Research》2016,47(4):1299-1308

Lipopolysaccharide (LPS), a component of Gram negative bacteria, was reported as important immunostimulant for fish. In this study, striped catfish were fed diets containing different Escherichia coli LPS concentrations (0%, 0.01% and 0.05%) for 2 weeks and then fed control feed (0% LPS) for 4 weeks. Plasma cortisol and glucose were rather low and did not differ significantly among treatments (P > 0.05). The respiratory burst activity, lysozyme, complement, total of antibody as well as mortality in fish challenged with Edwardsiella ictaluri were recorded every 2 weeks (W2, W4 and W6). The lysozyme activity significantly increased in fish treated with LPS (P < 0.05) in W2, W4 and W6. The highest values of respiratory burst activity were observed at week 4 in fish fed 0.01% LPS. There were significant differences in total of antibody between fish fed LPS (0.01%) and control in W2, W4. The challenge test with Edwardsiella ictaluri showed that fish fed 0.01% LPS had lower cumulative mortality (40%, 33% and 42%) compared with the fish fed 0.05% LPS (50%, 40% and 47%) and control fish (40%, 57% and 53%) in the three difference sampling times respectively. These results suggest that feed supplemented with 0.01% LPS could enhance immunity of striped catfish after 2 weeks of oral administration and fish could be protected against bacterial infection during the following 4 weeks.  相似文献   

新孢子虫与弓形虫交叉抗原AMA1基因重组腺病毒的构建及免疫应答分析     

李航  姜利建  刘晋宇  兰岚  凌芳芳  石甜甜  张贺洋  贾立军 《中国畜牧兽医》2016,43(12):3336-3342

为构建新孢子虫和弓形虫AMA1基因重组腺病毒,并分析其免疫原性,本试验根据新孢子虫和弓形虫AMA1基因序列的开放阅读框,设计新孢子虫和弓形虫交叉抗原AMA1基因通用引物,构建重组克隆质粒pMD18T-NcAMA1、pMD18T-TgAMA1及重组腺病毒穿梭质粒ADV4-Nc/TgAMA1,将ADV4-Nc/TgAMA1和骨架质粒pacAd5线性化后共转染293T细胞,包装Ad5-Nc/TgAMA1重组腺病毒,测定病毒滴度后,收集病毒液接种BALB/c小鼠,间接ELISA检测小鼠血清IgG抗体水平。结果显示,Nc/TgAMA1在Ad5-Nc/TgAMA1重组腺病毒中获得表达,测定Ad5-Nc/TgAMA1重组腺病毒滴度为10⁹PFU/mL,接种BALB/c小鼠后,Ad5-Nc/TgAMA1接种组IgG抗体水平明显高于pVAX1-Nc/TgAMA1质粒组和PBS对照组。结果表明,构建的Ad5-Nc/TgAMA1重组腺病毒能诱导小鼠产生特异性体液免疫应答。本试验为新孢子虫和弓形虫交叉抗原AMA1基因重组腺病毒载体疫苗的研制奠定了基础。  相似文献