查询词典 pathogenicity

Thirty-one isolates of Fusarium oxysporum were achieved from the samples of watermelon roots and soils collected in Shandong, Hubei, Anhui, Jiangshu, Hunan, Henan and Hebei. Their pathogenicity was identified by means of the co-culture methos.

从我国7个西瓜产区（山东、湖北、安徽、江苏、湖南、河南及河北）的西瓜枯萎病病株和病土样中分离获得31株西瓜枯萎病菌株，采用幼苗共培养法测定各菌株的致病力。

Generally, cultivation of a blast resistant variety in large-scale induce higher survival pressure to cause mutation in blast fungus Magnaporthe grisea that generates new virulence and enhances pathogenicity to result in resistance losing quickly in popular variety.

当大面积栽培单一抗病品种将会提高田间稻热病病原菌的生存压力，迫使病原族群产生变异，使得推广作物品种丧失抗性。

Phylogenic analysis based on entire S1 gene sequences showed that majority isolates clustered together with the close phylogenetic relationships. Therefore, we researched pathogenicity of the selected isolate IBV CK/CH/LDL/05II in this group, Pathogenic study showed that this virus caused 100% morbidity and 54.5% mortality to 15-day-old specific-pathogen-free.The kidneys from the dead chickens showed the predominant gross lesions which were pale, mottled, and swollen. The renal tubules and ureters were distended with excess urates.

经S1基因系统进化树分析发现，本实验所分离的大多数IBV毒株(8/12)分布于同一基因进化群内，并且亲缘关系较近，因此，我们对此群中IBV毒株CK/CH/LDL/05II的致病性进行研究，以10~(5.5)×EID_(50)/0.1ml的病毒接种15日龄的SPF雏鸡，鸡群发病率为22/22(100%)，死亡率为12/22(54.5%)，死亡鸡以肾脏肿大、苍白、外观呈现典型的&花斑肾&，肾小管和输尿管扩张并且有尿酸盐沉积为主要病理变化。

The three isolates have four specific replacements in 87 , 88 , 95 , and 119 in S1 hypervariable region, and a unique cleavage site R-X-R-T-G-R in 3' terminal region. These data may be valuable for investigation of molecular basis of the serotyping, tissue tropism and pathogenicity of these virus isolates.

本文的3个分离毒株Q1、J2和T3在S1高变区的87，88，95和119有4个特有的替换，在3'末端有独特的裂解位点R-X5-R-T-G-R，这些结果可能对这些分离毒株的血清型特异序列和组织趋向性和致病性的分子决定区方面的研究有重要的价值。

The three isolates have four specific replacements in 87, 88, 95, and 119 in SI hypervariable region, and a unique cleavage site R-X-R-T-G-R in 3 terminal region. These data may be valuable for investigation of molecular basis of the serotyping, tissue tropism and pathogenicity of these virus isolates.

由于SI蛋白序列99－12川立氨基酸之间的序列可能对病毒的致病性起重要作用，SI蛋白5，高变区（56－69；117－131）与中和表位和血清型密切相关，这些区域在IBV血清型和基因型间起联系作用。

The results of this study confirm the instability of prophage, and suggested that the prophage plays important role in the pathogenicity of O157:H7, and in the evolution of pathogenic bacteria.

该研究证实了编码Stx的原噬菌体具有不稳定性，原噬菌体对O157的致病性具有重要作用，也提示原噬菌体在致病菌的进化过程中也具有重要作用。

To study the existence of transfusion transmitted virus in liver tissue taken from the people with no viral hepatitis and it's pathogenicity.

检测非病毒性肝炎人群肝组织中经输血传播病毒感染情况，探讨其致病性。

Pathogenicity of 83 Curvularia isolates including 76 isolates from corn and 7 isolates from other hosts were tested in seedling and adult stage of corns. Among these species based on morphology, C. lunata, C. pallescens, C. lunate var. aeria, C. clavata and C. ovoidea could cause the typical Curvularia leaf spot symptom that lesions are grayish spots up to 1mm in diameter appear in the centers and straw-colored or chlorotic halos may surround the lesions.

以上方面的研究结果表明：通过形态鉴定，来自玉米弯孢菌叶斑病病害标样中的148株弯孢菌被鉴定为9个种和1个变种，即新月弯孢菌、苍白弯孢(C.pallescens)、新月弯孢菌气生变种(C.lunata var.aeria)、棒弯孢、C.ovoidea、不等弯孢(C.inaequalis)、塞河弯孢(C.senegalensis)、香茅弯孢(C.cymbopogonis)、Curvularia sp〓和Curvularia sp〓。

Under the same eggs inoculation levels,and using such index as root decay,relatively gall index,relatively eggs mass index,shoot height,root length and shoot weight,the pathogenicity for 34 Meloidogyne populations from different areas in 11 provinces in China to the tobacco cultivars K326 and Honghua Dajinyuan were clustered by SAS.

在相同的接种水平下，以烟草品种K326、红花大金元为供试寄主，用SAS软件，对坏死百分率、相对根结指数、相对卵块指数、株高、根长、地上部分重等6个指标进行聚类，分析不同或相似生态条件下，4种常见根结线虫中34个群体的致病性。

Genes involved in interactions among plants and pathogens,pathogenicity related genes,and the genes encoding bactericidal peptide,which have been studied in order to promote resistance to soft rot.

目前已有大量研究证实，利用植物与病原菌互作的相关基因、病原菌致病性的相关基因以及杀菌肽基因可以或有望提高植物对软腐病的抗性。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。