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virus     
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  病毒
    Cloning, Expression and Transformation of Barley Yellow Dwarf Virus GPV ORF5 Gene
    大麦黄矮病毒GPV株系ORF5基因的克隆、表达载体构建及转基因研究
短句来源
    RNA Mediated Transgenic Resistance to Potato Virus Y by Transforming Tabacco with the CP Gene Segments and Inverted Repeats
    马铃薯Y病毒CP基因的短片段及其反向重复转基因烟草的RNA介导的抗病性研究
短句来源
    Nucleotide Sequence Analysis of the Genome of Barley Yellow Dwarf Virus GAV and the Movement Protein-mediated Resistance in Transgenic Wheat
    大麦黄矮病毒GAV基因组全序列分析及运动蛋白基因介导的抗病毒小麦的研究
短句来源
    Effect of the RNA5 Component on Pathogenicity of Beet Necrotic Yellow Vein Virus by Infectious cDNAs
    利用侵染性cDNA研究甜菜坏死黄脉病毒RNA5与病毒致病性的关系
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    Genomic Structure and Molecular Population Genetics of Rice Stripe Virus
    水稻条纹病毒的基因组结构及其分子群体遗传
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    Study on Seed Transmission of Sugarcane Mosaic Virus in Corn
    玉米种子传播甘蔗花叶病的研究
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    Analysis for Spontaneous Mutagenesis of Wheat Yellow Mosaic Virus RNA1
    小麦黄色花叶病RNA1的自然变异分析
短句来源
    Development of cDNA Clones for RNAs in Vitro Transcription of Wheat Yellow Mosaic Virus and Their Infections of Cell Culture Systems
    小麦黄花叶病侵染性cDNA克隆及细胞侵染体系的建立
短句来源
    Cloning of TEV CP, HC-Pro and Cross Protection between Tobacco Etch Virus and Sugarcane Mosaic Virus
    烟草蚀纹病CP、HC-Pro基因克隆及与甘蔗花叶病之间交互保护作用的研究
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    VIRUS DISEASES OF LEGUMES (ANNUAL REPORT,1957—1958)
    1957—1958年豆类病的工作报告
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  病毒的
    Genomic Structure and Molecular Population Genetics of Rice Stripe Virus
    水稻条纹病毒的基因组结构及其分子群体遗传
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    The Genetic Diversity of Citrus Tristeza Virus
    柑橘速衰病毒的遗传多样性研究
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    EFFECT OF TEMPERATURE ON Y VIRUS INFECTION IN POTATO PLANTS
    马铃薯 Y 病毒的侵染与温度的关系
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    STUDIES ON THE HOST PLANTS OF WHEAT ROSETTLE STUNT VIRUS
    小麦丛矮病毒的寄主植物研究
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    STUDIES ON THE APPLICATION OF GRANULOSIS VIRUS OF PIERIS PAPAE
    菜粉蝶颗粒体病毒的应用研究
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  病毒(
    SEROLOGICAL DETECTION OF WHEAT ROSETTE STVNT VIRUS(WRSV)
    小麦丛矮病毒(WRSV)的血清学检测法
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    IDENTIFICATION ON TOBACCO NECROSIS VIRUS INFECTING SOYBEAN AND MULBERRY
    侵染大豆和桑的烟草坏死病毒(TNV)的鉴定
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    SELECTION OF PROTECTANTS FOR GRANULOSIS VIRUS FROM PIERIS BRASSICAE (PbGV)
    大菜粉蝶颗粒体病毒(PbGV)保护剂的筛选
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    A Study of Apple Latent Virus Indentification of Latent Virus Pathogens in Principal Apple Cultivars
    苹果潜隐病毒(Latent Virus)研究——苹果主栽品种潜隐病毒毒原鉴定
短句来源
    BIOLOGICAL PROPERTIES OF A GUANGDONG ISOLATE OF TOMATO SPOTTED WILT VIRUS (TSWV)
    番茄斑萎病毒(TSWV)广州分离物生物学特性研究
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  virus
Human immunodeficiency virus type 1 (HIV-1) integrase is a potential target for anti-HIV therapy.
      
It is an essential enzyme required for replication of the acquired immunodeficiency syndrome (AIDS) virus.
      
Efavirenz is a trifluoromethylated inhibitor of human immunodeficiency virus type 1 (HIV-1) reverse transcriptase (RT) that shows good results in anti-HIV chemotherapy.
      
Derivatives on Herpes simplex virus type 1 (HSV-1), Mayaro virus (MAY) and vesicular stomatitis virus (VSV) were investigated.
      
Compounds 2d, 3f, 3a, and 3c exhibited antiviral activity against HSV-1, MAY, and VSV virus with EC50 values of 6.8, 2.2, 4.8, 0.52, 2.5, and 1.0.
      
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In recent years,a new disease of the foxtail millet (Setaria italica (L.) Beauv.)has been reported to occur in epiphytotic scale in most of the millet growning areasof North China.On account of the brilliant red pigmentation of the infected plant,the disease is generally referred to by the farmers as the red-leaf disease.However,the symptoms on the millet plants varied with different varieties.In general,thecharacteristic symptom exhibited on the "purple-stem" varieties was the the redden-ing of the leaf blade,leaf...

In recent years,a new disease of the foxtail millet (Setaria italica (L.) Beauv.)has been reported to occur in epiphytotic scale in most of the millet growning areasof North China.On account of the brilliant red pigmentation of the infected plant,the disease is generally referred to by the farmers as the red-leaf disease.However,the symptoms on the millet plants varied with different varieties.In general,thecharacteristic symptom exhibited on the "purple-stem" varieties was the the redden-ing of the leaf blade,leaf sheath and spike,particularly the bristle,while that onthe "green-stem" varieties was the yellowing of the leaf blade.In all instances,thediscoloration was usually accompanied by shortening of internode,stunting of thewhole plant.wrinkling of leaf surface,slight waviness of leaf margin,deformationof spike and underdevelopment of root systems.Plants infected at an early stagewere severely stunted and on heads were produced. It has been demonstrated that the red-leaf disease of the foxtail millet was causedby a virus readily transmitted by at least three different species of grain-infestingaphids:corn aphid,Rhopalostiphum maidis Fitch;grain aphid,Macrosiphum granari-um Kirby;and green-bug,Toxoptera graminum Rond.Tests with non-viruliferouscorn aphid eliminated the possibility of direct aphid injury as the cause of the disease. ??The virus was not transmissible by mechanical inoculation,by seeds nor through thesoil. Studies on the mode of transmission of red-leaf virus by corn aphid indicatedthat the virus was persistent in its insect vector and could infect in succession aseries of at least 27 tested millet seedlings.The aphid was unable to acquire thevirus in a 5-minute feedling period on the virus source but was able to pick up thevirus in 10-minute period.The 8-hour acquisition feeding period was optimum forthis aphid.The testing feeding period was found to be not more than 5 minutesand a 4-hour period of confinement on the diseased plant was ample for the aphidto cause maximum infection.Attempts to transmit the virus with cotton aphid.Aphisgossypii Gloner peach aphid,Aphis persicae Sehult and soybean aphid,Aphis glycinesMats,have given negative results.The incubation period for symptoms of the red-leaf virus in foxtail millet ranged from 10 to 32 days with the model period beingbetween 14 to 20 days. Under natural conditions,certain cultivated cereals and grass weeds showed thesymptoms resembling the red-leaf disease of foxtail millet.Among them,were ZeaMays L.,Panicum miliaceum L.,Setaria lutescens (Weigel) Hubb.,S.viridis (L.)Beauv.,Digitaria sanguinalis (L.) Scop.Echinochloa crusgalli (L.) Roem.,Eragrostiscilianensis (All.) Link,E.pilosa (L.) Beauv.,Arundinella anomala Steud,Spodiopogonsibiricus (Steud.) Trin.,Bothruochloa ischaemum (L.) Keng.,Capillipedium parviflor-um (R.Br.) Stapf and Poa practensis L..Artificial inoculation with the corn aphidproved that the first six named plant species,including the two cereals,were susce-ptible to the red-leaf virus and they produced,in all cases,the typical symptoms.Tests with the rest sexen grass weeds are in progress. The results of disease control experiments by timely spraying with an insecticide,E605,under field conditions were inconsistent.Among the 349 foxtail millet varie-ties of foxtail millet examined in the experimental field,nine of them were foundto be highly torelant to and suffered only very slightly from the attack of the red-leaf virus.These varieties were,however,succeptible in aphid transmission experiments. Available evidences point to the conclusion that the red-leaf virus of the foxtail millet herin reported is quite different from all the previously described cereal viruses.Among the cereal virus that closely resembles the red-leaf virus is the yellow-dwarfvirus reported by Oswald tnd Hauston.These two viruses are similar in the follow-ing respects:both are transmissible by the same species of aphids (Rhopalosiphummaidis,Microsiphum graminium andToxoptera granarium) and neither virus can betransferred mechanically.But they differ strikingly from each other in their hostranges.According to Oswald and Hauston,there were 19 of 55 grasses tested thatappeared to be immune from the yellow-dwarf virus.Digitaria sanguinalis,Echino-chloa crus-galli Setaria viridis and Zea Mays were among the immune hosts.On thecontary,all these four gramineous plants were found to be extremely susceptible tothe red-leaf virus both under natural condition and in artificial inoculation experi-ments.Accordingly,the red-leaf,a persistent aphid borne virus affecting the foxtailmillet,is herein reported as a new virus of the cereals.

小米红叶病是在我国华北分布普遍和为害严重的一种小米病害。病害的症状,在紫杆的小米品种上面,主要的是叶片、叶鞘和穗变紅;在青杆品种上面是叶片黄化。無論如何,紫杆和青杆品种病株除变色外,都可随伴各种畸形,包括植株矮化、叶面绉折、叶綠波状、穗变形和根系發育不良。紅叶病是一个借蚜虫傳播的病毒病害衩籽痢⒙蟪す苎梁吐蠖硌辆軅鞑ゲ『?其中以玉米蚜为最重要。曾經测定玉米蚜在病株上面吸食获得病毒和在健株上面吸食所需最短的时間;带毒玉米蚜的数目和傳病效能的关系谐嵫梁腿舫婢軅鞑 S锰已痢⒋蠖寡梁兔扪羵鞑∥椿竦谜慕Y果。紫杆品种感病后,仅表皮細胞、叶毛細胞和泡状細胞变成紅化,其下层的組織不紅化。叶綠素逐漸消失,但消失过程相当的慢。在病害最末期,維管束內的靱皮細胞少数的坏死,导水管內可能充塞有棕色胶質物,其它細胞無显著的变化。檢查病叶未發現有細胞內含体。用带毒蚜虫作人工接种,証知小米紅叶病病毒能侵染玉米和黍。这两种作物在自然环境下均發生紅叶病。在自然环境下,有以下的禾谷类杂草紅化:金狗尾、青狗尾、馬唐、大画眉草、画眉草、稗、野牯草、大油芒、白羊草、細柄草和六月禾。用玉米蚜作人工接种証明稗、青狗尾、金狗尾、馬唐、六月禾和大油...

小米红叶病是在我国华北分布普遍和为害严重的一种小米病害。病害的症状,在紫杆的小米品种上面,主要的是叶片、叶鞘和穗变紅;在青杆品种上面是叶片黄化。無論如何,紫杆和青杆品种病株除变色外,都可随伴各种畸形,包括植株矮化、叶面绉折、叶綠波状、穗变形和根系發育不良。紅叶病是一个借蚜虫傳播的病毒病害衩籽痢⒙蟪す苎梁吐蠖硌辆軅鞑ゲ『?其中以玉米蚜为最重要。曾經测定玉米蚜在病株上面吸食获得病毒和在健株上面吸食所需最短的时間;带毒玉米蚜的数目和傳病效能的关系谐嵫梁腿舫婢軅鞑 S锰已痢⒋蠖寡梁兔扪羵鞑∥椿竦谜慕Y果。紫杆品种感病后,仅表皮細胞、叶毛細胞和泡状細胞变成紅化,其下层的組織不紅化。叶綠素逐漸消失,但消失过程相当的慢。在病害最末期,維管束內的靱皮細胞少数的坏死,导水管內可能充塞有棕色胶質物,其它細胞無显著的变化。檢查病叶未發現有細胞內含体。用带毒蚜虫作人工接种,証知小米紅叶病病毒能侵染玉米和黍。这两种作物在自然环境下均發生紅叶病。在自然环境下,有以下的禾谷类杂草紅化:金狗尾、青狗尾、馬唐、大画眉草、画眉草、稗、野牯草、大油芒、白羊草、細柄草和六月禾。用玉米蚜作人工接种証明稗、青狗尾、金狗尾、馬唐、六月禾和大油芒均感染小米紅叶病病毒。其它紅化杂草和接种試驗,正在进行中。紅叶病病毒对小米植株所产生的影响,因植株發育的阶段不同而輕重有所差异,植株感病愈早病害愈剧烈。用杀虫剂E605在田間噴射小米防治紅叶病,未能表現药剂有防病的效能,在田間观察349个品种,选得9个高度耐病和农艺性状优良的品种。抗病选种可能是当前防治小米紅叶病最有效的防治措施。根据病原的傳染方法,寄主范围和所表現的症状,小米紅叶病病毒和以往所报道的禾本科植物的病毒病害的病毒均不相同,因此它是禾谷类作物的一个新的病毒。

This is a further study on the "Kwuting" of Chinese cabbage which has beendemonstrated to be caused by a strain of turnip virus (Turnip virus 1 Hoggan etJohnson).Isolates from the "Kwuting" of Brassica pekinensis,mosaic of B.chinensis,of B.oleracea var.capitata and of Raphnus sativus var.longipinnatus are mixed invarious proportions and inoculated to the Chinese cabbage seedlings.All mixturesproduce the same symptoms and the same degree of severity as Kwuting virusinoculated alone.Therefore in pathogenicity...

This is a further study on the "Kwuting" of Chinese cabbage which has beendemonstrated to be caused by a strain of turnip virus (Turnip virus 1 Hoggan etJohnson).Isolates from the "Kwuting" of Brassica pekinensis,mosaic of B.chinensis,of B.oleracea var.capitata and of Raphnus sativus var.longipinnatus are mixed invarious proportions and inoculated to the Chinese cabbage seedlings.All mixturesproduce the same symptoms and the same degree of severity as Kwuting virusinoculated alone.Therefore in pathogenicity they can only be grouped under thesame strain. When the air temperature in greenhouse is maintained at an optimum (around28℃) of the disease development,a variation of the soil temperature (15°,20%25° and 30℃) by using the modified Wisconsin soil tanks doas influence the degreeof expression of symptoms.However,the influence is more significant in the caseof a susceptible variety as Chiaochowpai,and less in the cases of a tolerant varietyas Chinpaikou and a variety of Brassica chinensis L. During the course of the development of the Chinese cabbage plant,an infec-tion which takes place at the early stage (especially in the stape prior to 7-8leaves),causes far more severe symptoms than in the case of late infections(usually after the starting of heading).This effect is also more pronounced inthe case of a susceptible variety "Chioachowpai". Varietal tests for the resistance to "Kwuting" are crrried out both at Pekingand Hsingchen (Northeast China).According to the results of a two-years-test,it is revealed that four varieties,namely Shangtung No.1,No.2,KungchulingTamayi and Hsingchen Tamayi are highly resistant both at Peking and Hsingchen,whereas a tolerant variety Chinpaikuo shows high tolerance at Peking,but highsusceptibility at Hsingchen.Some commercial varieties which are generally cultiva-ted in north-eastern provinces,such as Chiaochowpai,Heitaoweng and Pantsoutsaiare all highly susceptible.

白菜孤丁病毒与油青菜花叶病毒、甘兰花叶病毒及蘿卜花叶病毒经各种配合的混合接种后,在症状土及發病率上沒有显著的差异,说明它們不但是同一个毒种,而且可能是同一个毒株。土壤温度影响白菜弧丁的發病,土温在30℃时,高度感病的胶州白菜的發病几乎比在15℃的土温高出一倍。但这种关系在耐病的青白口上,以及感病的另一菜种油青菜(Brassica Chinensis L.)上,則不显著。白菜在幼苗期受侵较后期受侵的發病严重,但这种影响也是以高度感病的品种为显著,例如胶州白菜在8月29日接种的比在10月23日接种的病情指数高一倍多。这种关系对耐病的青白口及高度抗病的山东二号说来,在北京田间情况下不明显。在北京和辽宁兴城两地經1954及1955两年的比較試驗,选出了高度抗孤丁病的山东一号及二号、公主岭的大麻叶及兴城的大麻叶等4个品种。北京的青白口在北京地区是一个耐病的品种,但在兴城則失去其耐病性。山东著名的胶州白菜是一个高度感病的品种,其他如东北的半矬菜在兴城、徐水的白帮核桃纹在北京都是高度感病的。

Using potato tubers of Irish cobbler variety naturally infected with X- and Y-virus, the writer compared the concentrations of X-virus in the young sprouts of different seed pieces longitudinally cut from the same tuber and subjected to various temperatures, light and darkness, normal and dereased oxygen tensions during the period of germination. Comparison of the virus concentrations was made by serological precipitin test and local lesion counts on half-leaves of Gomphrena globosa. Thermostat...

Using potato tubers of Irish cobbler variety naturally infected with X- and Y-virus, the writer compared the concentrations of X-virus in the young sprouts of different seed pieces longitudinally cut from the same tuber and subjected to various temperatures, light and darkness, normal and dereased oxygen tensions during the period of germination. Comparison of the virus concentrations was made by serological precipitin test and local lesion counts on half-leaves of Gomphrena globosa. Thermostat experiments showed that tubers germinated under 20℃. gave rise to sprouts containing highest amount of X-virus, with a precipitin titer of generally 1:80 to 1:160, reaching a maximum of 1:320, average half-leaf lesions numbered approximately 30. The virus concentrations under 16℃. and 24℃. were very close, both with precipitin titer about half and lesion number about two third of those under 20℃. There was evidently a further decrease of virus conoentration in the sprouts derived from seed pieces germinated under 28℃. The sprouts germinated under darkness gave a precipitin titer ahnost 4 times higher than those germinated under light. No difference in X-virus concentration has been observed among sprouts aerated with 21%, 10%, 5% oxygen during their germination. There was no detectable change of virus concentration, even when root growth from the sprouts was entirely inhibited under decreased oxygen tension. It is not immediately clear whether the above stated factors affect the multiplication of X-virus in the potato sprouts or the mobilization and translocation of the virus already present in the tuber into tte germinating sprouts.

著者曾以感染着X-和Y-病毒的早熟白品种的馬鈴薯块茎,用血清沉淀反应和在千日紅上接种的方法,研究了块茎发芽期間温度、光和氧气对幼芽內X—病毒浓度的影响。在試驗中均用同一块茎的切块作每种条件变化的处理。在定温箱內所做的发芽温度試驗的結果指出,块茎在20℃中发出的幼芽內X-病毒的浓度最高,沉淀滴度一般在1/80—1/160之間,最高的达到1/320,千日紅上平均半叶斑点数目約为30。16°及24℃中的病毒浓度相近,沉淀滴度約为20℃的1/2,斑点数目达20℃的2/3左右。28℃发出的幼芽內病毒浓度最低,平均沉淀滴度約在1/10—1/20之間,平均半叶斑点数目为11.9。块茎在黑暗和光照下发芽的試驗表示,在光照下发出的幼芽內X-病毒浓度显著低于黑暗下发芽的,其沉淀滴度的比例約为1∶4。当块茎在正常空气以及10%、5%的氧气条件下发芽时,沉淀滴度和接种試驗都未发現幼芽內X-病毒浓度的可测定的差異,而在氧分压低的条件下发的芽由于生长量較少,按整芽計算的病毒总量也相应較低。

 
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