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西瓜细菌性果斑病研究进展 总被引:14,自引:2,他引:14
西瓜细菌性果斑病是由类产碱假单胞菌西瓜亚种〔Pseudomonas pseudoalcaligenes subsp. citrulli (Schaad et al. 1978)〕所引起,1992年该病菌改名为燕麦食酸菌西瓜亚种〔Acidovorax avenae subsp. citrulli (Willems et al. 1992) 〕。革兰氏阴性菌,属rRNA组I。不产生荧光和其他色素,单根极生鞭毛,严格好氧。不产生精氨酸水解酶,能在41℃下生长,但不能在4℃生长,明胶液化力弱,氧化酶和2-酮葡糖酸试验阳性。利用葡萄糖和蔗糖作碳源结果不一致;但利用β-丙氨酸、柠檬酸盐、乙醇、乙醇胺、果糖、L-亮氨酸和D-丝氨酸结果一致… 相似文献
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为筛选高抗瓜类细菌性果斑病的西瓜资源,以24份西瓜品种资源为试材,采用苗期喷雾接种法分别接种分离自甜瓜上的瓜类嗜酸菌Acidovorax citrulli菌株pslb96和ZZ-1,鉴定各品种资源对瓜类细菌性果斑病的苗期抗性。结果表明,24份西瓜品种资源中未发现有对2株菌株表现免疫的材料,有7份资源对菌株pslb96表现高抗,12份资源对菌株ZZ-1表现高抗;9份资源对菌株pslb96表现中感或感病,7份资源对菌株ZZ-1表现中感和感病;对2株菌株均表现高抗的品种资源有野生型种质资源A9及商品种华欣、申蜜968、申选958和申抗988,占总品种资源的20.83%。部分品种资源A4、A13和申蜜7号对菌株pslb96和ZZ-1的抗性表现出明显的差异,表明相同寄主来源的2株不同菌株致病力存在差异。 相似文献
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哈密瓜细菌性果斑病综合治理指南 总被引:8,自引:0,他引:8
20世纪80年代新疆和内蒙古哈密瓜开始发生细菌性果斑病犤Acidovoraxavenaesubsp.citrulliWillemsetal.1992(燕麦食酸菌西瓜亚种)=Pseudomonaspseudoalcaligenessubsp.cit-rulliSchaadetal.1978(类产碱假单胞菌西瓜亚种)犦。已经证明哈密瓜种子带果斑病病菌,并通过雨水等传播。该病为害叶片和果实。病菌侵染瓜条,使瓜条失去商品价值。一般生产田发病率45%~100%。该病在新疆和内蒙古发生为害严重,经济损失巨大,并有上升趋势,对我国的哈密瓜及其他葫芦科作物的生产构成了严重威胁,已经成为限制和阻碍哈密瓜进一步发展的首要障碍。本病属于新… 相似文献
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哈密瓜细菌性果斑病及其防治 总被引:12,自引:2,他引:12
哈密瓜汁多味甜 ,清凉爽口 ,深受消费者喜爱 ,经济效益高 ,且又是理想的前茬作物 ,有利于后茬作物的增产 ,可实行粮、棉、油行间套作 ,农民种瓜的积极性很高。巴盟从 1991年左右开始从新疆引种种植哈密瓜 ,到 2 0 0 0年种植 1 3~ 2 0万hm2 ,每年种植的品种有 4 0~ 50个。主要品种有 :抗病皇后、早皇后、新皇后、新太后、860 1、86 1、甘密宝、西域 3号、西域1号和杂交皇后。 1996年发现哈密瓜细菌性果斑病 ,近几年发生严重。巴盟地区 5月上旬播种哈密瓜 ,6月上旬见斑点病病斑 ,7月份严重。小瓜表面见不到病斑 ,大瓜上病斑清楚可见。病… 相似文献
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哈密瓜细菌性果斑病病原菌鉴定 总被引:37,自引:3,他引:37
2000年在内蒙古和新疆的哈密瓜上发现一种新细菌病害-哈密瓜细菌性果斑病,从病叶和病果上分离到33个细菌菌株,接种哈密瓜、西瓜和甜瓜后,发病症状与自然发病症状完全一致,而且从接种病株上又重新分离到了此病原细菌,这33个细菌菌株经柯赫法则证明均为该病的致病菌。各菌株致病力无明显差异。经革兰氏染色反应、菌体形态、培养性状、生理生化反应、细胞化学成分分析(糖、蛋白质、氨基酸、脂肪酸、mol% G+C)、DNA-DNA杂交,确认该病原菌为燕麦食酸菌西瓜亚种(Acidovorax avenae subsp.citrulli Willems et al.1992)=类产碱假单胞菌西瓜亚种(Pseudomonas pseudoalcaligenes subsp.citrulli Schaad et al.1978)。该病菌除侵染哈密瓜外,人工接种尚能侵染多种葫芦科及番茄、茄子等作物。 相似文献
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本文利用群体感应信号报告菌Agrobacterium tumefaciens NTL4(pZLR4),在LB报告平板上对燕麦食酸菌西瓜亚种的19个菌株进行了初步检测,发现18个菌株有群体感应信号产生.用琼脂条法对菌株Pslb-94进一步检测,证实菌株Pslb-94存在群体感应系统.提取了该菌株信号物质,反相薄层层析(TLC)检测证明该菌株能产生群体感应信号分子. 相似文献
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瓜类果斑病菌(Acidovorax avenae subsp.citrulli,Aac)是瓜类作物上重要的病原细菌,为我国进境植物检疫性有害生物。胶体金免疫层析试纸条方便快捷,应用广泛。该方法使用不当会出现假阳性问题,仅适用于病原菌的初筛检测。本研究将Aac胶体金免疫层析方法(GICA)与PCR技术相结合,建立了GICA-PCR检测方法。检测结果表明,该方法在蛋白与核酸2个层面上从发病西瓜叶片上检测到瓜类果斑病菌,有效解决了试纸条检测的假阳性问题,提高了瓜类果斑病菌检测的准确性,值得推广应用。 相似文献
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Romina P. Bertani Maria F. Perera Constanza M. Joya Diego D. Henriquez Claudia Funes Solana Chaves Victoria González Bjorn Welin María I. Cuenya Atilio P. Castagnaro 《Plant pathology》2021,70(7):1719-1732
A significant increase in the occurrence of red stripe (caused by Acidovorax avenae subsp. avenae) has been observed in the last decade in Argentina. Considering that no extensive sampling of the main sugarcane-producing area in the country has been conducted to characterize the diversity and population structure of A. avenae subsp. avenae, molecular markers were employed to analyse 112 isolates from Tucumán. By using repetitive element polymorphism-based polymerase chain reaction (rep-PCR) almost all isolates were differentiated and grouped into 10 clusters, revealing a high genetic diversity. Using the amplified fragment length polymorphism (AFLP) technique, five pairs of isolates were discriminated that could not be distinguished with rep-PCR. Cluster analysis showed no clear association between isolate clustering, sugarcane host genotype, crop age, type of tissue sampled, fertilization, or year of sampling. Linkage equilibrium analysis by using rep-PCR data indicated that the population has some degree of clonality. Three housekeeping genes were also sequenced: ugpB and pilT sequences were highly similar to A. avenae subsp. avenae sequences from other Argentinian isolates, whereas the lepA sequence did not reveal significant similarity. An additional four housekeeping genes could not be amplified, suggesting the existence of differences in those regions. Subsequently, virulence of 14 A. avenae subsp. avenae isolates was evaluated under controlled conditions. Results showed a differential level of aggressiveness among the isolates on a resistant sugarcane variety. This study confirmed that rep-PCR is an adequate tool for genetic analysis and population structure characterization in bacteria, and revealed both high genetic diversity and clonal population structure of A. avenae subsp. avenae in Tucumán, Argentina. 相似文献
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Sakata Nanami Aoyagi Taketo Ishiga Takako Ishiga Yasuhiro 《Journal of General Plant Pathology》2021,87(6):387-393
Journal of General Plant Pathology - Bacterial brown stripe caused by Acidovorax avenae subsp. avenae (Aaa) causes serious damage on creeping bentgrass on golf course greens. However, there are few... 相似文献