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1.
Serological relationships between five fungally transmitted cereal viruses and other elongated viruses 总被引：2，自引：0，他引：2
F(ab')2 and protein A ELISA tests were used to investigate the serological affinities of five fungally transmitted cereal viruses: barley yellow mosaic (BaYMV), barley mild mosaic (BaMMV), oat mosaic (OMV), wheat yellow mosaic (WYMV) and oat golden stripe (OGSV). Within this group only BaYMV and WYMV were related. Chinese and UK isolates of BaYMV appeared to be similar. In tests using antisera to 29 other elongated viruses, BaYMV was related to one isolate of bean yellow mosaic poty virus (BYMV-G) and OGSV had affinities with BYMV-G, potato virus M, red clover vein mosaic (both carlaviruses) and perhaps Hordeum mosaic virus. The results were confirmed in immunoelectron microscopic tests. No affinities were found for BaMMV, OMV or WYMV. 相似文献
2.
The distribution of two UK strains of barley yellow mosaic virus has been studied and both have been transmitted experimentally by Polymyxa graminis. cDNA hybridization studies support the suggestion that the strains should be considered distinct viruses. Oat mosaic and oat golden stripe (OGSV) viruses also occur in the UK. OGSV is a furovirus related to wheat soil-borne mosaic furovirus: it has particles of two lengths and a bipartite genome. 相似文献
3.
通过禾谷多粘菌Polymyxa graminis L.休眠孢子分离接种感病大麦品种,并进行砂培养,获得13个纯化了的禾谷多粘菌分离物,且其中3个带有大麦黄花叶病毒(BaYMV)。用分别带有BaYMV和大麦温和花叶病毒(BMMV)的英国禾谷多粘菌分离物的游动孢子接种13个中国大麦品种,以及用BaMMV摩擦接种36个中外大麦品种,抗性鉴定结果游动孢子接种与摩擦接种一样,均与田间鉴定结果一致,且大麦对BaYMV的抗性与对BaMMV的抗性一致,从而这2种接种方法可用于大麦品种(系)和育种中间体对BaYMV抗性的快速鉴定和筛选。游动孢子或休眠孢子接种方法还可有效地鉴定大麦对禾谷多粘菌的抗性。 相似文献
4.
研究比较分析了“青华矮6号”等水稻抗病新品种对我省稻白叶枯病〔Xan-thomonas campestris pv.orvzae(Gshiyama 1923)Dye,1978〕Ⅰ—Ⅳ菌群的抵抗性,它们的抗感性按照品种×菌株的互作反应,可划分为6个类型,以中抗品种“华竹40”为亲本杂交育成的新品种均表现不同程度抗病。其中尤以“青华矮6号”的抗病性最好。“青华矮6号”是采用多系杂交育成的一个纯晚型中迟熟、丰产抗病、米质好的品种,测试证明对广东Ⅰ、Ⅱ、Ⅲ及Ⅳ菌群表现高抗,对优势菌群的抗病等级为1.3～1.4,CK_1(IR_(26)抗病)为0.84～1.2,CK_2(二白矮感病)为6.0,抗性差异达到显著水平,L.S.D=0.77(P=0.05),主要抗性基因为Xa_4。该品种经3年多点大面积验证试验结果,它的丰产抗病性表现一致。 相似文献
5.
发生在我国的小麦黄花叶病毒病 总被引：6，自引：0，他引：6
本文对山东荣成流行的一种小麦病毒病进行了鉴定。提纯的病毒颗粒为长线状,13×100—300nm及13×350—650nm。汁液接种感染小麦,但不感染烟草、苋色藜等植物。病土、病根以及含有禾谷类多粘菌(POlymyxa graminis)游动孢子的浸液可以传毒于小麦、大麦及黑麦。此病毒与大麦黄花叶病毒(BYMV)、小麦梭条花叶病毒(WSSMV)有血清学关系,与小麦土传花叶病毒(WSBMV)无血清学关系。病叶表皮细胞中有无定形内含体。超薄切片可见风轮状内含体。实验结果表明,荣城地区发生的这种小麦病毒病是小麦黄花叶病毒所致。 相似文献
6.
大麦条纹花叶病毒(BSMV)在新疆的发生 总被引：2，自引：0，他引：2
在新疆五家渠奇台黑芒小麦上分离到大麦条纹花叶病毒,致死温度60~65℃;体外存活期9~14天;稀释限点1:3000倍。人工接种可侵染禾本科植物,对接过种的非禾本科植物如灰藜、苋色藜、菠菜、甜菜、普通烟、心叶烟、枯斑三生烟、萹豆等不表现病状。用聚乙二醇沉淀和聚乙二醇沉淀、差速离心提取病毒,注入家兔体内,可形成相应的抗体,效价为1:128,1:1024,病毒颗粒为短棒状115~129×20毫微米。
初步观察,病株上的麦种带毒率与种子的饱满程度、品种、感病阶段有一定的相关性。病株上的花粉与健株母本杂交的种子不带毒。 相似文献
初步观察,病株上的麦种带毒率与种子的饱满程度、品种、感病阶段有一定的相关性。病株上的花粉与健株母本杂交的种子不带毒。 相似文献
7.
W. HUTH 《EPPO Bulletin》1989,19(3):547-553
During the last ten years yellow mosaic of barley has been spreading more and more in European countries and in some infested areas yield loss can only be prevented by growing resistant cultivars. Breeding of such cultivars is one of the most important goals of small-grain breeders. To select resistant cultivars, several methods are available such as mechanical inoculation, growing of plants in infested soil in the field or in growth chambers as well as using root powder of infected plants. The situation has recently been complicated by the discovery that yellow mosaic is caused by at least two distinct but closely related viruses (barley yellow mosaic virus and barley mild mosaic virus). Inoculation methods are not equally effective for these two viruses. Although it appeared initially that resistance to the two viruses was linked, there are now indications that some barley cultivars respond differently, and there may even be a third virus involved. Programmes for selection of resistant cultivars now have to take account of this. 相似文献
8.
9.
A potyvirus (designated as no. 656) causing mosaic or vein-banding symptoms on melons was isolated and characterized. The virus was mechanically transmitted to 14 herbaceous plant species, and induced mosaic symptoms in most cucurbitaceous plants. Aphis gossypii transmitted the virus non-persistently, and flexuous filamentous virus particles c. 755 nm in length were consistently observed in extracts of the infected pumpkin leaf tissues. Pinwheel and tubular inclusions were observed in the cytoplasm of infected zucchini leaf tissues. The virus was purified from infected pumpkin leaves by isopycnic centrifugation (Cs2 SO4 ). The molecular weights of purified capsid and cylindrical inclusion proteins as estimated by SDS-PAGE were 32·5 and 73 KDa , respectively. In SDS-immunodiffusion tests, antiserum to virus particles from isolate 656 was serologically unrelated to ZYMV, WMV-2, PRV-W and a type W variant of PRV, but antiserum to its cylindrical inclusion protein did produce spur precipitin bands between homologous and WMV-2 antigen wells. However, neither WMV-2 virus particle nor cylindrical inclusion antisera reacted with this virus. Furthermore, this virus was not serologically related to BCMV, BYMV, CYVV, SMV, WMV-M or ZYFV. Based on test results and symptomatology, this virus appears to be a new potyvirus, for which the name melon vein-banding mosaic virus (MVbMV) is proposed. 相似文献
10.
Djabbar Hariri Michel Meyer 《European journal of plant pathology / European Foundation for Plant Pathology》2007,118(1):1-10
In April 2001, stunted barley plants bearing mosaic symptoms were observed in a field in France (Marne Department, 51). Rod-shaped
and flexuous particles were visualized by electron microscopy and positive serological reactions were detected by ELISA with
Barley yellow mosaic virus (BaYMV) and Soil-borne cereal mosaic virus (SBCMV) polyclonal antisera. The tubular virus which was soil transmissible to barley cv. Esterel was separated from BaYMV
by serial mechanical inoculations to barley cv. Esterel. This furo-like virus, in contrast to a French isolate of SBCMV, could
be transmitted to Hordeum vulgare, Avena sativa, Beta vulgaris and Datura stramonium. RT-PCR was used to amplify the 3′-terminal 1500 nucleotides of RNA1 and the almost complete sequence of RNA2. Nucleotide
and amino acid sequence analyses revealed that the French virus infecting barley is closely related to a Japanese isolate
of Soil-borne wheat mosaic virus (SBWMV-JT) which was originally isolated from barley. This French isolate was named SBWMV-Mar. The 3′ UTRs of both RNAs can
be folded into tRNA-like structures which are preceded by a predicted upstream pseudoknot domain with seven and four pseudoknots
for RNA1 and RNA2, respectively. The four pseudoknots strongly conserved in RNAs 1 and 2 of SBWMV-Mar show strong similarities
to those described earlier in SBWMV RNA2 and were also found in the 3′ UTR of Oat golden stripe virus RNAs 1 and 2 and Chinese wheat mosaic virus RNA2. Sequence analyses revealed that the RNAs 2 of SBWMV-Mar and -JT are likely
to be the product of a recombination event between the 3′ UTRs of the RNAs 2 of SBWMV and SBCMV. This is the first report
of the occurrence of an isolate closely related to SBWMV-JT outside of Japan. 相似文献
11.
12.
D. Hariri M. Meyer J. Le Gouis N. Bahrman M. Fouchard C. Forget A. Andre 《European journal of plant pathology / European Foundation for Plant Pathology》2000,106(4):365-372
The reaction of thirty-four barley cultivars from European and Asiatic origin was analysed in six soils infected with barley yellow mosaic virus complex (BaYMV, BaMMV). These soils were selected from 16 sites for their differences in cultivar response. Amongst the six cultivars carrying the ym4 gene (Esterel, Express, Labéa, Majestic, Réjane, Vanoise), only cv Majestic was infected at one site with BaYMV and BaMMV. Concerning BaYMV, three cultivars were infected on all the soils and 19 on none of them. Twelve cultivars were differentially infected depending on the soil. In the case of BaMMV, four cultivars were infected on all the soils and 19 on none of them. Eleven cultivars were differentially infected depending on the soil. ELISA tests revealed the presence, in these soils, of variants of BaYMV and BaMMV that were able to overcome at least seven of the 12 known resistance genes (ym3, ym4, ym6, ym8, ym9, ym10, ym11) and the resistance of three varieties (Tosan Kawa 73, OU1 and Taihoku A) in which the genetic basis is unknown. Amplification by RT-PCR of the N-terminal region for three of BaYMV variants was performed. Nucleotide and amino acid sequences were determined and compared with the corresponding sequence of a common strain of BaYMV-G. A few nucleotide differences were detected between all the French isolates, but there were no strain specific amino acid differences. 相似文献
13.
J. P. CHEN M. J. ADAMS F. T. ZHU Z. Q. WANG J. CHEN S. Z. HUANG & Z. C. ZHANG 《Plant pathology》1996,45(6):1117-1125
About 90 barley cultivars mostly of European or Japanese origin, were grown for 2–5 years at eight sites in China where barley yellow mosaic virus was known to occur. The sites were selected because they had previously been used to screen breeding lines and some differences between them in cultivar response had been suspected. ELISA tests showed that symptomless plants were not infected by the virus and the proportions of plants with symptoms were therefore recorded as a measure of susceptibility. European cultivars carrying the ym4 gene, which confers resistance to the common European strain, were usually resistant at two sites but susceptible at the others, but one (cv. Energy) was resistant at all sites. Eleven of the Japanese cultivars showed differential responses between sites but there was no correspondence with strains recognized in Japan. There are probably several distinct Chinese strains but further experiments would be needed to identify them. The Japanese cultivars Chosen, Hagane Mugi, Iwate Mensury 2 and Mokusekko 3 seem to be resistant to all known virus strains and are probably the most useful for plant breeders. 相似文献
14.
Djabbar Hariri Michel Meyer Hayat Prud'homme 《European journal of plant pathology / European Foundation for Plant Pathology》2003,109(9):921-928
In March 2002 in a French field, severe mosaic symptoms appeared on plants of the barley cultivar Tokyo with the rym5 locus controlling resistance to all European strains of barley yellow mosaic virus (BaYMV) and barley mild mosaic virus (BaMMV). Electron microscopic examination revealed that the disease symptoms were associated with the presence of flexuous particles which resemble bymoviruses. From these observations and after enzyme-linked immunosorbent assay analysis it was first determined that the plants could be infected by BaMMV and BaYMV. Mechanical transmission of these viruses to the barley cultivar Magie susceptible to both viruses was only possible for BaMMV. This new pathotype (BaMMV-Sil) from Sillery (Marne Department, 51, France), in contrast to another mechanically transmitted French BaMMV isolate (BaMMV-MF), could be transmitted mechanically to two barley cultivars (Tokyo, Misato Golden), Arachis hypogaea, Datura stramonium and Lactuca sativa. BaMMV-Sil was indistinguishable from three BaMMV isolates from Germany (G), Japan (Ka1) and France (PF) by monoclonal antibodies in ELISA while the Japanese isolate (Na1) and BaMMV-MF were distinguishable from all. The sequence of the 3-terminal region of BaMMV-Sil RNA1 was determined. Comparison with previously published sequence data of capsid proteins indicated that BaMMV-Sil was closely related to BaMMV-Ka1, BaMMV-G and another German isolate (BaMMV-ASL1). Resistance-breaking BaMMV strains able to infect cultivars carrying the rym5 locus have also been described in Japan (BaMMV-Na1) and Korea (BaMMV-Kor). No specific amino acid differences were detected between the capsid proteins of BaMMV-Sil, BaMMV-Na1, BaMMV-Kor and those BaMMV isolates that do not overcome the rym5 resistance gene. These results indicate that BaMMV-Sil is a new pathotype of BaMMV in France and suggests that the capsid protein is not the determining factor of the pathogenicity towards the resistance gene rym5. 相似文献
15.
用A蛋白免疫电镜技术,检测大麦病汁液中的大麦黄花叶病毒(BaYMV),其捕获抗血清的适宜工作浓度范围很宽,320-20,480倍均能达到满意的结果;抗原孵育条件以室温(约25℃)下30分钟或冰箱(约4℃)中3小时,捕获到的病毒粒子数量较多。应用这项技术,在稀释3,125倍的病汁液中还能检测到BaYMV粒子,比普通免疫电镜方法的灵敏度至少高5倍。BaYMV在病株中的分布以症状明显的花叶中含量最高,黄化叶中较少,茎和根中找不到病毒。利用该技术可以快速而灵敏地进行大麦品种抗病性的鉴定与筛选。本文最后还讨论了BaYMV的稳定性。 相似文献
16.
胶体金免疫电镜技术检测和鉴定病汁液中不同形态的植物病毒 总被引：8，自引：0，他引：8
本文报道胶体金免疫电镜技术的建立:铜网捕获病毒后,用其稀释约200倍的同源抗血清修饰处理3~5分钟,羊抗兔IgG-金复合物标记3~5分钟,经磷钨酸负染,电镜下可见病毒粒子周围金颗粒特异性吸附,而背景上非特异性吸附很少。用此技术成功地快速检测和鉴定了病汁液中线状病毒(大麦黄花叶病毒,大麦温和花叶病毒,小麦梭条斑花叶病毒,芜菁花叶病连和马铃薯Y病毒)、棒状病毒(烟草花叶病毒、长叶车前草花叶病毒和土传小麦花叶病毒)以及球状病毒(水稻矮缩病毒、黄瓜花叶病毒和大麦黄矮病毒)。用0.5M PBSpH7.0制备病汁液,可大幅度提高同源抗血清对黄瓜花叶病毒的捕获能力。 相似文献
17.
Djabbar Hariri Hayat Prud'homme Marc Fouchard Genevieve Boury Pierre Signoret Hervé Lapierre 《European journal of plant pathology / European Foundation for Plant Pathology》2001,107(8):775-785
The properties of Aubian wheat mosaic virus (AWMV), a new soil-borne wheat virus in France, were investigated. Symptoms include foliar mosaic and severe stunting of winter wheat. The vector of the disease is unknown but the plants infected carry Polymyxa graminis in the roots. AWMV was transmitted mechanically to wheat and to two dicotyledoneous species: Lactuca sativa and Vicia faba. This virus was transmitted by seed to three winter wheat cultivars tested. Purified preparations contained rod-shaped particles with a variable length of 150–700 nm. Certain particles are very long and appear flexible. Antiserum raised against AWMV reacted specifically with AWMV in both indirect and direct enzyme-linked immunosorbent assays (ELISA). The incidence of AWMV in 26 winter wheat cultivars was investigated in the field during the growing season of 1999–2000. AWMV was detected in roots and shoots of all cultivars regardless of the symptoms. Twelve virus species belonging to the genera Benyvirus, Bymovirus, Furovirus, Pecluvirus and Pomovirus did not react with the AWMV antisera. A new tubular virus described in winter wheat in Bedfordshire in England reacted strongly with AWMV in ELISA. It is concluded that AWMV and probably the Bedford-virus constitute a previously undescribed tubular virus biologically and serologically distinct from other soil-borne viruses of wheat. 相似文献
18.
M. J. ADAMS 《Plant pathology》1991,40(1):53-58
Improved diagnosis of barley yellow mosaic (BaYMV) and barley mild mosaic (BaMMV) viruses was obtained by adjusting the buffers used in immunospecific electron microscopy (ISEM) to ensure a pH ≥ 7-0 and in ELISA by replacing ovalbumin with 10 g/l full cream milk powder.
Over 70% of samples of winter barley with symptoms of mosaic received from different sites in the UK during 1987-90 had BaYMV and 37% had BaMMV, with 11% containing both viruses. BaMMV was much more common on malting cultivars than on those grown for feed and this resulted in an easterly bias to the geographical distribution of the virus. Both viruses were, however, widely distributed in areas where winter barley is grown intensively. A small number of BaYMV records were from cultivars previously regarded as resistant and these are probably a distinct strain of the virus. 相似文献
Over 70% of samples of winter barley with symptoms of mosaic received from different sites in the UK during 1987-90 had BaYMV and 37% had BaMMV, with 11% containing both viruses. BaMMV was much more common on malting cultivars than on those grown for feed and this resulted in an easterly bias to the geographical distribution of the virus. Both viruses were, however, widely distributed in areas where winter barley is grown intensively. A small number of BaYMV records were from cultivars previously regarded as resistant and these are probably a distinct strain of the virus. 相似文献
19.
A. A. BRUNT 《EPPO Bulletin》1989,19(3):437-451
The viruses and virus-like pathogens transmitted by zoosporic fungi are reviewed. The nine furoviruses (and possible members of the group), with labile rod-shaped particles, have nearly all been shown to be transmitted by plasmodiophoromycete vectors. As they have been reviewed extensively elsewhere, they are covered only briefly; important examples are beet necrotic yellow vein furovirus and potato mop-top furovirus. Five viruses with filamentous particles, tentatively recognized as poty viruses, are transmitted by Polymyxa graminis. Within this group, wheat yellow mosaic virus should be considered to include wheat spindle streak mosaic virus, while the M and NM forms of barley yellow mosaic virus, the best known members of the group, should probably be regarded as distinct viruses. Chytrids (especially Olpidium brassicae) transmit a variety of viruses in different groups (e.g. tobacco necrosis necrovirus, lettuce big-vein virus, melon necrotic spot carmovirus, red clover necrotic mosaic dianthovirus). Finally, several diseases caused by uncharacterized pathogens appear to be transmitted by O. brassicae: freesia leaf necrosis, lettuce ring necrosis, pepper yellow vein, watercress chlorotic leaf spot. 相似文献
20.
In Germany the furovirus Soil-borne cereal mosaic virus (SBCMV) and the bymovirus Wheat spindle streak mosaic virus (WSSMV) occur often together particularly in several rye production areas. Soil-borne wheat mosaic virus (SBWMV), a wheat infecting furovirus, has so far been found only in one field near Heidelberg. Each of these viruses is transmitted by Polymyxa graminis. The cultivation of resistant varieties is the only promising measure to prevent yield losses caused by soil-borne viruses. Resistance of wheat against the bymovirus WSSMV is comparable to the immunity of barley to the bymoviruses Barley yellow mosaic virus and Barley mild mosaic virus. In case of immunity no virus multiplication is observed in resistant cultivars. In contrast, all wheat cultivars are hosts of the furoviruses. All cultivars – including the resistant ones – can be infected following mechanical inoculation with SBWMV and SBCMV. Resistance to furoviruses is based on reduced levels of virus multiplication in roots and on inhibition of virus movement from roots to leaves. Because of the inhibited virus movement from roots to aerial parts of plants this type of resistance is referred to as translocation resistance. In spite of the different resistance mechanisms the absence of virus symptoms on the leaves is a common selection criterion for both immunity and translocation resistance. Therefore, the symptom free development of plants on uniformly infested fields is the best criterion for selecting wheat lines with resistance to soil-borne viruses. The limited suitability of other selection methods is discussed. 相似文献