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Search Results: 1 - 10 of 24475 matches for " 岑贞陆 "
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水稻品种次生物质与稻白叶枯病(xanthomonasoryzaepv.oryzae)抗性的关系
杨朗?,梁广文?,曾玲?,
生态学报 , 2008,
Abstract: 应用高效液相色谱分析了对白叶枯病具有不同抗性水平的12个水稻品种中的19个(组)次生物质色谱峰(面积)的差异及其与白叶枯病抗性水平间关系。结果表明,水稻品种抗性水平与谱峰面积值之间相关极显著(r=0.992,p<0.01),被测的19个组分中,峰1、峰2、峰8、峰10、峰12、峰14、峰16和峰18是影响水稻对稻白叶枯病抗性水平的主要抗原次生物质。建立了水稻品种对白叶枯病抗性级别与以上次生物质含量谱峰面积之间的回归模型:y=10.7603+0.1823x1-0.2287x2+02163x8-2.1975x10+0.0728x12-0.7438x14+1.1484x16-0.7795x18。研究结果表明水稻品种中起抗病作用的抗原次生物质不止一种,而是几种的组合,而且它们对水稻抗病性的贡献作用是不完全相同的,这与它们的性质与含量密切相关。提出了以抗原次生物质为标记的快速分析、鉴定、预测水稻品种对稻白叶枯病抗性水平的新途径、新方法。
环境因素对香蕉叶斑病菌喙突脐蠕孢生长和产孢的影响
林善海,黄思良,,覃丽萍,付岗,黎起秦
菌物学报 , 2013,
Abstract: 为进一步明确香蕉叶斑病菌喙突脐蠕孢的生物学特性,调查了部分环境因素(碳氮源、植物成分培养基)对供试菌株(CLER09、D087和JL05)的营养生长和产孢的影响。结果显示,分生孢子主要先从基部萌芽,在28℃下约培养10h后出现两端萌芽;供试菌株对测试的20种碳源及26种氮源显示相似的生长反应,均可利用除菊糖外的测试碳源及氮源进行营养生长和产孢;测试的6种植物成分培养基对供试菌株的营养生长效果皆优于PDA培养基;除燕麦培养基外,其余5种培养基对菌株CLER09和D087的产孢作用均优于PDA培养基;测试的6种培养基对菌株JL05的产孢作用均优于PDA培养基。不同植物成分培养基对该菌分生孢子形态影响较大,以米糠、象草培养基对菌株D087和JL05的分生孢子长度和玉米粉培养基对菌株CLER09的分生孢子宽度的增长效果最为明显。
Relationship between the resistance of rice varieties to Xanthomonas oryzae pv. Oryzae and secondary compounds in rice leaves
水稻品种次生物质与稻白叶枯病(Xanthomonas oryzae pv. oryzae)抗性的关系

YANG Lang,LIANG Guang-Wen,ZENG Ling,CEN Zhen-Lu,
杨朗
,梁广文,曾玲,

生态学报 , 2008,
Abstract: 应用高效液相色谱分析了对白叶枯病具有不同抗性水平的12个水稻品种中的19个(组)次生物质色谱峰(面积)的差异及其与白叶枯病抗性水平间关系.结果表明,水稻品种抗性水平与谱峰面积值之间相关极显著(R=0.992,p<0.01),被测的19个组分中,峰1、峰2、峰8、峰10、峰12、峰14、峰16和峰18是影响水稻对稻白叶枯病抗性水平的主要抗原次生物质.建立了水稻品种对白叶枯病抗性级别与以上次生物质含量谱峰面积之间的回归模型:Y=10.7603 0.1823X1-0.2287X2 0.2163X8-2.1975X10 0.0728X12 -0.7438X14 1.1484X16-0.7795X18.研究结果表明水稻品种中起抗病作用的抗原次生物质不止一种,而是几种的组合,而且它们对水稻抗病性的贡献作用是不完全相同的,这与它们的性质与含量密切相关.提出了以抗原次生物质为标记的快速分析、鉴定、预测水稻品种对稻白叶枯病抗性水平的新途径、新方法.
Field resistance of Phytophthora melonis to metalaxyl in South China
华南地区瓜类疫霉对甲霜灵的田间抗药性

Yongguan Wu,Shaofeng Lu,Siliang Huang,Gang Fu,Liang Chen,DasenXie,Qiqin Li,Zhenlu Cen,
吴永官
,少峰,黄思良,付岗,陈亮,谢大森,黎起秦,

微生物学报 , 2011,
Abstract: Objective] Phytophthora melonis is the casual agent of wax gourd and cucumber Phytophthora blight which becomes a constraint for sustainable production of the related crops.Metalaxyl is one of the principal fungicides for controlling the disease now.The objectives of the present study were:(1) to investigate the baseline sensitivity and field resistance of P.melonis to metalaxyl in South China;(2) to test the occurrence of metalaxyl-resistant mutants from metalaxyl-sensitive wild type strains exposed to th...
Study on a bacterial strain Bt8 for biocontrol against citrus bacterial canker
柑桔溃疡病生防细菌Bt8的研究

TAN Xiao-yan,HUANG Si-liang,REN Jian-guo,YAN Wei-hong,CEN Zhen-lu,
谭小艳
,黄思良,任建国,晏卫红,

微生物学报 , 2006,
Abstract: Citrus bacterial canker is an important disease of Citrus species in China. The disease severely occurs especially in the coastal area. Integrated control system has been used for the control of the disease, in which chemotherapy plays an important role at present. The chemotherapy-dominant control system brought many problems to the environment, such as chemical residua in the products and induction of resistance to fungicide(s) by the pathogen. To solve these problems, an intensive study on biocontrol of citrus bacterial canker is needed. Isolations and characterizations of biocontrol agents are the basis for biocontrol of the disease. A bacterial strain Bt8 with strong inhibiting ability against Xanthomonas axonopodis pv. citri (Hasse) Vauterin, was isolated from citrus orchard soil in Nanning, China. The isolated bacterial strain was identified and characterized as Acinetobacter baumannii Bouvet et Grimont on the base of its morphology and 16S rDNA sequence analysis as well as physiological and biochemical characters. The inhibiting activity of the bacterium suspension against the pathogen was significantly influenced by environmental factors, such as temperatures, pHs and media. At temperatures of 18 degrees C to 33 degrees C, both the inhibiting activity of the bacterium suspension and the biomass of the bacterium increased with the increases of temperatures, suggesting that the influence of temperature on inhibiting activity of the bacterium suspension was in dependence on the bacterial biomass. In NA liquid medium of pH 10, the bacterium suspension showed the highest inhibiting activity against Xanthomonas axonopodis pv. citri, which was not in dependence on biomass of the bacterium. The bacterium suspension provided 55.2% inhibition against bacterial canker under greenhouse conditions. The results showed that Acinetobacter baumannii has potential as biocontrol agent against bacterial canker disease. Acinetobacter baumannii was reported as the pathogens infecting human and animals. The present study enriched the understanding on biological diversity in Acinetobacter baumannii to sciences. This is the first report on the isolation of Acinetobacter baumannii with strong inhibiting ability against plant pathogen.
Effects of environmental factors on growth and sporulation of Exserohilum rostratum causing banana leaf spot disease
环境因素对香蕉叶斑病菌喙突脐蠕孢生长和产孢的影响

LIN Shan-Hai,HUANG Si-Liang,CEN Zhen-Lu,QIN Li-Ping,FU Gang,LI Qi-Qin,
林善海
,黄思良,,覃丽萍,付岗,黎起秦

菌物学报 , 2013,
Abstract: 为进一步明确香蕉叶斑病菌喙突脐蠕孢的生物学特性,调查了部分环境因素(碳氮源、植物成分培养基)对供试菌株(CLER09、D087和JL05)的营养生长和产孢的影响。结果显示,分生孢子主要先从基部萌芽,在28℃下约培养10h后出现两端萌芽;供试菌株对测试的20种碳源及26种氮源显示相似的生长反应,均可利用除菊糖外的测试碳源及氮源进行营养生长和产孢;测试的6种植物成分培养基对供试菌株的营养生长效果皆优于PDA培养基;除燕麦培养基外,其余5种培养基对菌株CLER09和D087的产孢作用均优于PDA培养基;测试的6种培养基对菌株JL05的产孢作用均优于PDA培养基。不同植物成分培养基对该菌分生孢子形态影响较大,以米糠、象草培养基对菌株D087 和JL05的分生孢子长度和玉米粉培养基对菌株CLER09的分生孢子宽度的增长效果最为明显。
水稻细菌性条斑病和抗性育种研究进展
贺文爱,黄大辉,,张月雄,马增风,刘驰,陈英之,卢双楠,刘开勇,李容柏
植物遗传资源学报 , 2010,
Abstract: 水稻细菌性条斑病(简称细条病)是由Xanthomonasoryzaepv.oryzicola侵染引起的全球性病害,对水稻生产构成严重威胁。发掘和利用新抗源、定位克隆抗性基因及深入了解病原菌―水稻之间的相互作用机理等对于水稻抗细条病研究有重要意义。本文主要介绍了细条病的抗性鉴定与抗源筛选、抗性基因遗传分析与分子标记定位、抗性基因的克隆、抗性育种的研究现状,提出了加快抗细条病育种研究进程的建议。
育龄人群泌尿生殖道支原体感染情况及耐药性分析
Analysis of the Prevalence of Mycoplasma Infections and Their Drug Resistance in the Urogenital Tract among Reproductive Population
 [PDF]

李东明, , 曾尚娟, 黄丽英, 黄维真, 佘尚扬
Medical Diagnosis (MD) , 2015, DOI: 10.12677/MD.2015.54015
Abstract: 目的:了解南宁地区育龄人群泌尿生殖道支原体感染状况及其耐药性特点。方法:对2013年4月~2015年3月在本院就诊的2435例患者生殖道分泌物采用支原体培养鉴别计数药敏试剂盒进行解脲脲原体(Uu)和人型支原体(Mh)检测。结果:支原体感染率为44.97%,女性感染率为60.01%高于男性的29.33%,其中Uu、Mh和Uu+Mh感染率分别为33.96%、1.85%和9.16%。3种感染模式均敏感的有交沙霉素、多西环素和美满霉素,均耐药的为环丙沙星;Uu+Mh对12种抗菌药物耐药率高于Uu,Mh对除交沙霉素外的大环内酯类耐药率高于Uu+Mh,而对除左氧氟沙星外的喹诺酮类、四环素类耐药率低于Uu+Mh。喹诺酮类、大环内酯类和四环素类耐药率分别为84.11%、50.95%和29.95%。结论:南宁地区泌尿生殖道支原体感染率较高,女性高于男性,以Uu感染为主;支原体对常用抗生素的耐药性严重。
Objective: To investigate the prevalence of Mycoplasma infections and their drug resistance in the urogenital tract among reproductive population. Methods: Mycoplasma Urealytium and Mycop-lasma hominis were cultured in the urogenital tract specimens form 2435 patients from April 2013 to May 2015, and their drug sensitivity were analyzed. Results: The rate of Mycoplasma infection was 44.97%. It is higher in female (60.01%) than in man (29.33%), and they were 33.96%, 1.85% and 9.16% in patient with Uu, Mh and Uu+Mh infection. Mycoplasma was sensitive to josamycin, doxycycline and minocycline, and resistant against ciprofloxacin. The drug resistance of Uu+Mh for 12 kinds of antibiotic is much higher than Uu. Mh is more resistant to Uu for macrolide antibiotics except for josamycin, and it is low for quinolones and tetracyclines, except for levofloxacin. The rate of drug resistance for quinolones, macrolide antibiotics and tetracyclines was 84.11%, 50.95% and 29.95% respectively. Conclusion: The infection rate of Mycoplasmain the urogenital tract is high in Nanning. It is more obvious in female, mainly the infection rate of Uu. The drug resistance of mycoplasma for antibiotics was extensive.
水相法氯化橡胶的性能试验
,欧伯兴
涂料工业 , 2005,
Abstract: ?通过选用3种黏度相近的氯化橡胶产品:cr-2水相法氯化橡胶、kl-10国产溶剂法氯化橡胶及gw-10进口溶剂法氯化橡胶,进行对比试验,检测了3种产品的常规性能,分析了红外光谱,并分别进行了配漆试验。结果表明:水相法氯化橡胶的质量指标达到了溶剂型氯化橡胶产品的质量指标,热稳定性优于国产溶剂型氯化橡胶产品,与进口产品性能相当;配制成涂料的各项性能符合船舶漆产品的技术要求,稳定性与溶剂型产品相当。
华北地壳上部岩石热传导结构探讨
杨淑,秀文
岩石学报 , 1985,
Abstract: 近年来为配合华北大地热流和华北地温场等研究工作,我所地热研究室在华北地区内的任邱、大港、胜利、下辽河等油田及其周围山区的钻孔中取了大量岩芯,并同时在这些钻孔中进行了测温。这些钻孔在构造上位于冀中拗陷、黄骅拗陷、济阳拗陷、下辽河拗陷和沧县隆起、胶辽隆起区、鲁西隆起区、太行山隆起区及燕山褶皱带(图1)。隆起区的钻孔大部位于其山间盆地中。共取岩芯样品810个,其中沉积岩610个,火成岩和变质岩200个。其详
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