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Search Results: 1 - 10 of 40967 matches for " NIU Yong-Chun "
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Inheritance of Stripe Rust Resistance in the Native Wheat Variety Dazicao from China
小麦农家品种大籽糙抗条锈性的遗传分析 Inheritance of Stripe Rust Resistance in the Native Wheat Variety Dazicao from China

Jun-Li Dai,Yong-Chun Niu,
代君丽
,牛永春DAI Jun-Li,NIU Yong-Chun

遗传 , 2003,
Abstract: Dazicao, a native wheat variety with stripe rust resistance from Henan, China, was crossed with susceptible cultivar Mingxian 169 as the female parent. The F(1) progeny was selfed to produce F(2) progeny and backcrossed with Mingxian 169 to produce BC(1) progeny. In air-conditioned greenhouse,seedlings of the F(1), F(2), BC1 progenies and their parents were inoculated with the prevalent races CY28 and CY32 of Puccinia striiformis respectively. The phenotypes of the F(1), F(2) and BC(1) plants were analyzed for resistance to the two races. The results indicated that the resistance in the Dazicao to race CY32 was controlled by one recessive gene,and the resistance to race CY28 by complementary action of one dominant gene and one recessive gene.
用超常的复性温度改善小麦RA PD分析的效果 Better RAPD Patterns Obtained by Using High Annealing Temperatures in Wheat
刘红彦,牛永春,钟鸣LIU Hong-yan,NIU Yong-chun,ZHONG Ming
遗传 , 2001,
Abstract: 用38~66℃不同复性温度处理,比较了18条随机引物的扩增结果.发现复性温度在40~50℃之间均有数量不等的扩增产物,不同引物的最高复性温度不同,有些引物用60℃以上的复性温度仍有扩增产物.一些在35~38℃的复性温度下非特异性产物较多的引物,通过大幅度提高复性温度,能提高扩增产物的特异性,获得清晰的RAPD带型。 Abstract:To decrease nonspecific products and obtain clear RAPD patterns,18 10- mer random primers were tested at different annealing temperatures.The results indicated that all the amplification can be performed when the annealing temperature is in the range of 40~50℃.There were a few primers with which the amplification was still performed when the annealing temperature is above 60℃.By using high annealing temperatures,some primers which produce more nonspecific product at the annealing temperatures of 35~38℃ could generate reproducible and distinct bands.
The endophytic mycobiota in summer growing cucumber in Beijing
北京夏植黄瓜内生真菌区系研究

MU Lin-Xuan,NIU Yong-Chun,DENG Hui,
慕林轩
,牛永春,邓晖

菌物学报 , 2010,
Abstract: In order to understand the endophytic mycobiota and its variation in cucumber plants, endophytic fungi were isolated from 40 symptomless cucumber plants, including different cultivars at different stages, collected from Yanqing of Beijing. Based on morphological characteristics and 18S rDNA sequences, 18 genera were identified out of 1,024 endophytic fungi strains isolated from root, stem, leaf and fruit tissues. Among them, Exserohilum and Neocosmospora have not been known in previous reports about endophytic fungi. Alternaria, Aspergillus, Chaetomium, Cladosporium and Fusarium existed universally in different organs at all stages. The colonizing rate of Alternaria species reached 47.0% and was far higher in leaves than in other organs, and the colonizing rate of Fusarium species reached 32.5% and was far higher in roots than in other organs. Most of the endophytic fungi showed organ favoritism in different degrees. Some genera of fungi only existed in specified organs. The number of genus and total colonizing rate of endophytic fungi were higher in leaves and roots than in stems and fruits. Along with plant growth, the number of genera of endophytic fungi and the colonizing rates of some fungi increased, but the colonizing rates of Neocosmospora and Chaetomium species decreased from all organs. The results could provide some foundation for further researches on ecology and function of endophytic fungi in cucumber.
TAXONOMIC STUDY ON THE PATHOGEN OF GERLACHIA LEAF BLIGHT,A NEW DISEASE OF WHEAT IN CHINA
中国小麦雪霉叶枯病菌种的鉴定

NIU YONG-CHUN,SHANG HONG-SHENG,WANG SHU-QUAN,WANG FANG,
牛永春
,商鸿生,王树权,王芳

菌物学报 , 1992,
Abstract: 系统研究和鉴定了产自中国陕西、青海、宁夏、四川、贵州、西藏、湖北、新疆等8个省区的31个小麦雪霉叶枯病菌菌系和1个产自捷克的菌系。结果表明,各菌系的培养性状和形态特征、尤其是环痕状的产孢细胞和具淀粉质顶环的子囊等均符合 Gerlachia nivalis (Ces.Ex Sate.)W.Gares & E.Mdll.有性态:Monographella nivalis (Schaffn·)E·Mfill·]的鉴别特征。小麦雪霉叶桔病菌对三唑酮等8种药物比镰刀菌敏感,各菌系人工接种小麦幼苗均引起相同症状,人工接种可侵染22属55种禾本科植物。确认了该菌与欧洲、北美发生的红色雪霉病病菌为同种。因此,将中国小麦雪霉叶枯病菌定名为雪腐格氏霉Gerlaehia nivalis(Ces.Ex Saee.)W.Gams & E. Miill.]。
STUDIES ON THE SELECTIVE ISOLATION MEDIUM FOR GERLACHIA NIVALIS
雪腐格氏霉选择性培养基研究

NIU YONG-CHUN WANG SHU-QUAN SHANG HONG-SHENG,
牛永春
,王树权,商鸿生

菌物学报 , 1990,
Abstract: 以尿素作氮源,甘油作碳源,对雪腐格氏霉(Gerlachia nivalis)有较强的选择加富作用,Fe—Na—EDTA和生物素对其分生孢子萌发和菌落生长有促进作用,五氯硝基苯、敌克松、瑞毒霉是较好的选择抑制剂。据此,提出了雪腐格氏霉选择性培养基配方:KH2PO4 1.0g,MgSO4·7H2O 0.5g,Fe-Na—EDTA 0.01g,尿素0.5g,甘油2.0g,生物素0.005mg,五氯硝基苯20ppm,敌克松14ppm,瑞毒霉5ppm,硫酸链霉素100单位/ml,氨苄青霉素50μg/ml,琼脂18g,蒸馏水1000ml。该培养基可促进雪腐格氏霉孢子萌发和菌落生长,可抑制多种常见土壤真菌生长。
Secondary metabolites from Bipolaris setariae NY1 strain
狗尾草平脐蠕孢NY1菌株的次级代谢产物分析

ZHAO Xing-Li,NIU Yong-Chun,DENG Hui,LUO Du-Qiang,
赵杏利
,牛永春,邓晖,罗都强

菌物学报 , 2013,
Abstract: 为进一步研究和利用具有杂草生防潜力的狗尾草平脐蠕孢Bipolaris setariae菌株NY1,对其次级代谢产物进行了分离与结构鉴定。从菌株NY1的大米发酵的乙酸乙酯提取物中分离到7个化合物,通过波谱分析将其分别鉴定为:邻苯二甲酸二异壬酯,麦角甾-5,7,22-三烯-3β-醇,5α,8α-过氧化麦角甾-6,22-二烯-3β-醇,6-甲基苯-1,2,4-三酚,3-脱羟基蛇孢菌素A,邻羟基苯甲醛,蛇孢菌素I。其中3-脱羟基蛇孢菌素A是一种植物毒素,而具有抗癌、抗菌作用的蛇孢菌素I的产量较高,具有工业化生产的潜力。
Ecology characters of soil faunas and microorganisms in the northeast heavy frigid region of China
东北高寒地区土壤动物和微生物的生态特征研究

SU Yong-Chun,
苏永春

生态学报 , 2001,
Abstract: 东北高寒地区农田在作物生长期内土壤动物具有明显的季节特征。土壤微生物季节变化具有单一的峰值,其中细菌和放线菌的高峰值在7月份,真菌的高峰值在6月份,从土壤酶及理化性质对土壤动物和微生物影响的灰色分析表明,对土壤动物和微生物影响最大的是脲酶,pH值,含水量和速效磷,并建立了8个灰色数学模型GM(0,5)],最小的为土壤水解氮,这表明了土壤中水和速效磷是该地区土壤生态稳定的主要因素,因此调整土壤水分供应状况和土壤磷肥输入对改善土壤质量和作物生产将是一个重要的策略,同时加强对脲酶对土壤氮素状况等相关因素的分析。
catena-Poly[[bis(pyridine-κN)nickel(II)]-μ-oxalato-κ4O1,O2:O1′,O2′]
Zhen-Yu Xuan,Yong Che,Yong-Chun Huang
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808021703
Abstract: The title compound, [Ni(C2O4)(C5H5N)2]n, was synthesized under hydro(solvo)thermal conditions. The NiII atom, lying on a twofold rotation axis, has an octahedral coordination geometry involving two N atoms from two pyridine ligands and four O atoms from two oxalate ligands. The Ni atoms are connected by the tetradentate bridging oxalate ligands into a one-dimensional zigzag chain.
Interactions between Surround Suppression and Interocular Suppression in Human Vision
Yong-Chun Cai, Shena Lu, Chao-Yi Li
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0038093
Abstract: Several types of suppression phenomena have been observed in the visual system. For example, the ability to detect a target stimulus is often impaired when the target is embedded in a high-contrast surround. This contextual modulation, known as surround suppression, was formerly thought to occur only in the periphery. Another type of suppression phenomena is interocular suppression, in which the sensitivity to a monocular target is reduced by a superimposed mask in the opposite eye. Here, we explored how the two types of suppression operating across different spatial regions interact with one another when they simultaneously exert suppressive influences on a common target presented at the fovea. In our experiments, a circular target grating presented to the fovea of one eye was suppressed interocularly by a noise pattern of the same size in the other eye. The foveal stimuli were either shown alone or surrounded by a monocular annular grating. The orientation and eye-of-origin of the surround grating were varied. We found that the detection of the foveal target subjected to interocular suppression was severely impaired by the addition of the surround grating, indicating strong surround suppression in the fovea. In contrast, when the interocular suppression was released by superimposing a binocular fusion ring onto both the target and the dichoptic mask, the surround suppression effect was found to be dramatically decreased. In addition, the surround suppression was found to depend on the contrast of the dichoptic noise with the greatest surround suppression effect being obtained only when the noise contrast was at an intermediate level. These findings indicate that surround suppression and interocular suppression are not independent of each other, but there are strong interactions between them. Moreover, our results suggest that strong surround suppression may also occur at the fovea and not just the periphery.
Chemical Composition, and Antioxidant and Antimicrobial Activities of Essential Oil of Phyllostachys heterocycla cv. Pubescens Varieties from China
Yong-Chun Jin,Ke Yuan,Jing Zhang
Molecules , 2011, DOI: 10.3390/molecules16054318
Abstract: The essential oils of Phyllostachys heterocycla cv. Pubescens, Phyllostachys heterocycla cv. Gracilis, Phyllostachys heterocycla cv. Heterocycla and Phyllostachys kwangsiensis leaves were obtained by steam distillation. Their chemical components were separated and identified by gas chromatography/mass spectrometry (GC/MS). Meanwhile, the effect of scavenging free radicals of essential oil was assayed by using the DPPH·method with Trolox? as control to evaluate their antioxidant capacities. Gram-positive (Staphyloccocus aureus) and Gram-negative (Escherichia coli) were selected as the indicator microorganisms to evaluate the antimicrobial activity. Antimicrobial properties were estimated by the agar diffusion method. The results show that 63 components were separated and identified by GC/MS from these varieties of bamboo leaves. cis-3-Hexenol, whose content in cv. Pubescens, Gracilis, Heterocycla and Ph. kwangsiensis was 27.11%, 24.62%, 30.51% and 34.65%, respectively, was the main constituent. The relative content of alcohol compounds in these varieties of essential oils ranged from 39.8% to 46.64%. All of the bamboo leaf essential oils possessed certain antioxidant capacity; the corresponding IC50 values were 3.1622, 4.9353, 4.2473, and 5.4746 μL/mL, respectively. Essential oils of all tested bamboo spp. were active against Staphylococcus epidermidis and E. coli, showing a positive correlation with the essential oil concentration of 50.42-300 μL/mL. The results indicated there were no significant differences among three varieties and the related species with respect to their antioxidant and antimicrobial activities. This paper provides evidence for studying the essential composition from different varieties of bamboo leaves.
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