感病

感病的植物群体不暴露在它们的病原之下，这是相当普遍的。

Nonexposure of susceptible plant populations to their pathogens is fairly common .

中抗品种与感病品种杂交，或双亲皆为感病品种，F1代病粒率多倾向双亲之间。

When middling resistance varieties crossed susceptible ones or two parents were susceptible , the infected seed rate in F1 generation was intermediat between two parents .

树皮中全P含量与该层土壤速效P含量及感病指数均具有显著的正相关性。

Phosphorus content of the poplar bark was correlated positively with both the disease index and the available P in the soil layer .

结果表明，抗病与感病亲本及其F1代接种后的同工酶谱带存在着明显的差异。

The result indicated that there were obvious difference on the parents and their F1 hybrids .

同一品种（系）内感病植株和不感病植株相比，膜脂过氧化水平、SOD活性和POD活性皆较高，可溶性蛋白质含量较低，差异达极显著水平。

But the soluble protein content of infected plants was significantly lower than that of non-infected .

利用一对特异性引物进行PCR扩增，可以检测到感病杨树体内的病原物。

A method of poplar rust disease quarantine via PCR with one pair specificity primer is introduced in the paper .

抗病品种CAT活性始终高于感病品种，施用生物有机肥后，可显著提高叶片体内的CAT活性。

CAT activity was higher in resistant cultivar , and application of microbial organic fertilizers could increase CAT activity in leaves .

对酶活性与田间感病指数作相关分析，发现SOD和POD活性与田间发病指数存在明显的正相关关系。

For the same variety , the SOD and POD activity was positively correlated with the field disease-infected index .

三个不同抗性组合的辣椒材料（感病品种保椒二号、抗病品种新丰五号、高抗品种砀椒一号）接种前POD同工酶谱没有明显差异；

The POD isoenzyme bands were not significantly different before inoculation among the three pepper cultivars with different resistance .

电导率和MDA含量均与感病时间呈显著正相关，而色素含量与感病时间呈显著负相关。

The electric conductivity and MDA content were positively related with infection time , whereas the pigment content was negatively related with it .

田间喷施7.3×107孢子／mL孢子悬浮液，感病率为75.81%

In field test , the death rate was 75.81 % after a spore suspension at 7.3 × 10 7 spores / ml was sprayed .

结果表明，3个水稻品种感病后PAL活性呈先上升后下降的趋势。

The results show that the activity of PAL goes up at first and then comes down .

接种后，抗病品种中PAL、SOD和CAT3种酶活性明显大于感病品种。

After inoculation , the PAL , SOD and CAT in disease-resistant varieties had significant enzyme activity greater than susceptible varieties .

植物的许多细菌性病害依赖于病原菌的III型效应基因和寄主的感病基因之间的互作。

Many bacterial diseases of plants depend on the interaction of type III effector genes of the pathogen and disease-susceptibility genes of the host .

t测验结果表明，抗病新品系97&10与感病品种新种花的PAL和POD活性峰值差异极显著。

The peak values of PAL and POD activities of97-10 significantly different from those of Xinzhonghua by Ducan 's testing .

品种感染溃疡病菌后，POD酶活性均升高，但抗病品种中酶活提高倍数高于感病品种。

POD activity ascended both in susceptible and resistant varieties postinfection , but it increased faster in resistant varieties than in susceptible varieties .

对40个小麦、4个黑麦和2个小黑麦品种及品系的胚和盾片进行同工酶电泳分析，发现抗病和感病材料的过氧化物酶酶谱的主要差异在酶谱中部（B区）。

Peroxidase isozymes electrophoretic analyses on embryos plus scutella from forty wheat varieties , four ryes and two triticales revealed differences in the middle of the zymograms ( B range ) of resistant and susceptible varieties .

抗病品种SOD活性不仅明显高于其对照，也明显高于病毒侵染后的感病品种。

Resistant varieties SOD activity was not only significantly higher than the control group , but also significantly higher than susceptible varieties , which were infected by virus .

通过对玉米病叶病症、病原形态观察及鉴定分析，确定了在感病亲本P（25）上侵染的病害类型是细菌性褐斑病，病原是丁香假单胞菌丁香致病变种。

According to the symptoms and morphology of pathogeny , determined that the disease infested on the susceptible inbred line P25 was bacterial brown spot disease , and the pathogeny was Pseudomonas syringae pv . syringae Van Holl .

结果表明，接种后，脱毒马铃薯抗病自交系F1的PAL活性曲线呈现2个峰，而感病自交系F的PAL活性曲线呈现1个峰；

After inoculation , the activities of the PAL of F 1 showed two peaks , while that of F showed only one peak .

在棉田土壤营养丰富的条件下，观察了转Bt基因抗虫棉和非抗虫棉对红叶茎枯病的感病性。

The experiment was conducted in 2003 and 2004 to observe the effects of transgenic Bt cotton and soil nutrients on red leaf blight of cotton .

结果表明，感病后，叶片中过氧化物酶（PO）和转化酶活性提高，蛋白质含量下降。

After infection , peroxidase ( PO ) and invertase activity increased , but the concentration of protein reduced in both resistant and susceptible plants .

根据病斑大小、形状、颜色及产抱情况等特征，初步区分为抗病型（R）、感病型（S）和中间型（M）3种病斑类型。

Base on the shape , size , colour of spots and the number producing spores , three types of spot is differentiated by authors , i. e. resistant type , susceptible type and middle type .

病菌和模拟接种都刺激水稻叶片PO活性上升，接种病菌，PO呈双峰曲线，抗病品系比感病品种的上升速度快；

PO activity was induced and showed double-peak curve , with a higher speed in the resistant lines by both inoculation of pathogen and sterilized water .

对黄瓜霜霉病抗性不同的黄瓜品种氨基酸含量进行测定，结果表明，在萌动种子内，除谷氨酸、赖氨酸和NH3外，其它氨基酸的平均含量抗病品种高于感病品种；

The contents of amino acid , sugar and chlorophyll in different cucumber varieties with different resistance to downy mildew of cucumber were tested .

H2O2相关代谢酶活性，在感病品系中变化较大，显著高于抗病品系。

Metabolic enzymes activities related H2O2 in the leaves of susceptible line increased significantly during post-inoculation , and were higher than those in the resistant lines .

为探明病毒侵染对烟草细胞膜的损伤作用，采用圆二色波谱仪（CD）分析了被TMV侵染的烟草细胞膜蛋白结构的变化，以及右旋紫草素对感病烟草细胞膜的作用。

The changes of secondary conformations of tobacco cell membrane protein after TMV-infection was investigated by CD Spectra Technique and the changes in membrane molecular conformations was checked .

抗病品种接菌后可溶性蛋白含量和FAA含量下降，感病品种与此相反，表现出不同抗性品种抵抗病菌侵染的特异性。

The content of soluble protein and FAA increased in sensitive variety , which was contrary in resistant variety .

同时，在健康的柑桔组织中，苯丙烷类代谢的定速酶PAL活性也是抗病类型高于感病类型；

In healthy citrus tissues , the activities of PAL , a key enzyme in phenylpropanoid metabolism , were higher in resistant types than in susceptible ones .

利用12个固定鉴别基因、17个辅助鉴别基因以及感病对照Thatcher作为鉴别寄主，对60株小麦叶锈菌作致病性鉴定。

With 12 fixed identifying gene , 17 assistant identifying gene and Thatcher , the virulence of 60 strains of wheat leaf rust were identified .