查询词典 pathogen

The bacterium Flavobacterium columnare is the pathogen causing columnaris disease, a world-wide bacterial fish disease causing heavy economical losses in aquaculture industry, and is a pathogen in China causing bacterial gill-rot disease, a serious disease in several major cultured fish species including the grass carp Ctenopharyngodon idellus .

本研究以柱状黄杆菌和草鱼为对象，以蛋白质组学技术为手段，用比较蛋白质组学的方法研究了柱状黄杆菌强毒株和弱毒株差异表达的胞外蛋白，研究了柱状黄杆菌外膜蛋白和草鱼鳃粘液的蛋白质组。

Biological characteristics of Curvularia lunataBoedijn had been preliminarily studied. Optimal mediums for pathogen growth were PSA,PDA and OMA.For mycelia growth,sporulation and conidial germination of pathogen,optimal temperature was 25～30℃,and pH 5～9.Among the tested carbon and nitrogen resources,sucrose,glucose,carbamide,sodium nitrate,etc were beneficial for mycelia growth and sporulation.The conidia germination is strict in RH requirement:Conidia can germinate at RH 81%～98%,or have 100% germin...

香蕉大灰斑病菌适合生长的培养基有PSA、PDA和OMA；菌落生长、产孢和孢子萌发最适宜的温度为25～30℃，pH 5～9；在碳源和氮源中，蔗糖、葡萄糖、尿素、磷酸氢二氨和硝酸钠有利于病菌生长和产孢；分生孢子萌发对湿度有严格的要求，RH≥80%以上分生孢子萌发，随湿度增加萌发率增高；光照对菌丝体无显著影响，光暗交替有利于孢子的形成；孢子致死温度为55℃(10min)。

Caused by Peperomia tetraphylla southern blight. The disease samples showing typical symptom were collected and pathogen was isolated based on Koch's rule. The biological characteristics of the pathogen were conducted, and 5 fungicides were selected and used for controlling the disease.

方法］采集具有典型症状的病害标本，根据柯赫氏法则分离病原物，并分别测定不同的温度、湿度、pH值以及碳氮源和光照对该病菌菌丝生长和菌核萌发的影响，同时，测试5种杀菌剂在3种不同浓度下对病原菌的抑菌作用。

The pathogen was i dentified as Botryosphaeria ribis,which belongs to Ascomycotina.The asexual pathogen was Phoma moricola Sacc,which belongs to Deuteromycotina. The stitable conditions for germ feat growth w ere temperature: 30, pH:7.0, relative humidity 98% in 3% maltose. Carbendazim and asomate could control thi s disease effectively.

研究表明：（1）该病是由子囊菌亚门茶子葡萄座腔菌所致，无性为半知菌亚门桑茎点菌；（2）该菌适宜生长的温度为30℃，pH为7.0 ；3%麦芽糖和 98%相对湿度对无性孢子萌发极为有利；（3）多菌灵和福美砷能有效控制该病。

From the results of our studies we deduced that sucrose itself in the pith tissue of corn stalk could rule as a represser in someway to suppress the pathogen producing enzyme or toxin which can destroy host cells, or it could destroyor inactivate the enzyme produced by the pathogen, or it was not suitable for toxin surviving in it.

同时，从研究结果我们推断蔗糖本身可能具有阻遏镰刀菌产生酶类或毒素作用，病菌在侵染抗病品种过程中可能因寄主组织中蔗糖含量高，而导致病菌产生的可破坏寄主细胞组织的酶类受到阻遏或活性受到钝化；或者蔗糖不利于致病菌毒素的存活。

Xanthomonas oryzae pv. oryzae, the casual agent of bacterial blight of rice, is one of the most important pathogens of rice in the world, and a bacterial pathogen model to study the plant-pathogen interactions.

水水稻白叶枯病菌(Xanthomonas oryzae pv.oryzae，简称Xoo)引起的白叶枯病是世界水稻生产上最严重的细菌病害之一，也是植物一病原物互作研究的重要模式系统之一。

The investigation of two years showed that corn ear rot by F.moniliforme was the dominant corn ear rot,and F.moniliforme was the major pathogen to corn ear rot. When the corn was harvested,the pathogen of the corn ear rot were isolated from diseased kernel in Duoying farm in Yaan, Sichuan.

玉米收获时，从雅安市多营农场采集患有典型症状的串珠镰刀菌性穗腐病的果穗，用患病病籽粒分离得到病原物，经过鉴定，确定其为串珠镰刀菌，作为本实验的实验菌株，冰箱保存备用。

The typical spot symptoms on fruit would decrease the production and merchandise of tomato in the heavy rain of June and July; therefore, the key period for disease control is after rainy season. Quick identification on pathogen was using PCR. 1476bp band was amplified by primer P3、P4of bacterial speck. By using primer CMM5、CMM6 for bacterial canker, 614bp fragment was amplified. These PCR tests provided important foundation for pathogen identification and disease diagnoses. Using primer RST65 and RST69 for bacterial spot, expected 420bp band was not amplified.

通过聚合酶链式反应对病原进行快速鉴定，证明加工番茄细菌性斑点病用引物P3、P4可以得到一条大小为1476bp的特异性条带，番茄细菌性溃疡用CMM5、CMM6可以扩增出一条大小为614bp的特异性条带，这为病害的快速诊断打下了基础，但利用引物RST65和RST69对番茄细菌性疮痂病进行鉴定，没有得到预期420bp的目标条带，故对细菌性疮痂病的快速检测还有待继续研究。

The first layer was dead tissue rich in pectins which were easily degraded during pathogen infection. The third layer at the bottom of the lenticels was very firm and considered as an effective barrier against pathogen penetration.

皮孔有3层，第1层为含果胶的死组织，易被病菌侵染降解，底部的第3层非常坚固，是阻止病菌侵染的有效屏障。

The compatibility of both Gvirens and B.firmus was researched. The fermentation filtrate of Gvirens , under the concentration of 70%, had not distinct inhibitory activity to B.firmus, the biomass of B.firmus would decrease with above the 70% filtrate of Gvirens, but the fermentation filtrate of B.firmus had not inhibitive role to Gvirens. 7, The cooperation control of both Gvirens and B.firm to the pine needle blight was explored:(1) Pathogen inoculation happened prior to the bio-control treatment for 7 days, however, the disease index and control effect had not distinct differences in any treatments even if combination of the two antagonists, but the susceptibility for different kind of pine were different.(2)when antagonist and pathogen were inoculated at the same time, some control effect to the pine needle blight, including certain extent cooperation control of both Gvirens and B.firm were proved, but it wasn't distinct when two antagonists used separately, and the change of the antagonist concentration had little effect to the control effect.

G.virens与B.firmus对松赤枯病的协同控制显示：(1)预先接种病菌后(7天)再进行生物防治处理，不管那种情况，感病指数和防治效果在处理间差异不明显，浓度影响无显著差异，即使是两种生防制剂联合作用也未显著提高其防效，但不同树种间的感病性有明显差异；(2)领抗菌与病原菌同时接种，对松赤枯病有一定防治效果，两菌联合有一定的协同作用，两菌分别单独施用防效差异不显著，浓度变化对防效影响不大；(3)预先接种颇抗菌能显著提高防治效果，两菌联合处理防效更优，感病树种的感病指数可降至13一15，抗病树种的感病指数可控制在3%左右；在同一浓度下B.f1'r功US、叹叮厂即s间无显著差异，在同一领抗菌下，浓度愈高，防效愈高：松，(4)三种生防接种方式的平均效果分析表明，叹F行ens最高平均防效49.5%黑 B。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。