查询词典 virulence

In this review, the molecular structure, substrate specificity, catalytic mechanism and other physicochemical parameters of laccase are summarized. The role of laccase in plant cell wall formation and pathogen virulence are discussed.

本文敍述漆酶的分子结构、底物特异性及其物理化学特性，并讨论漆酶的酶促反应机理和生物学功能，包括植物漆酶参与细胞壁的形成以及漆酶与病原菌毒力的关系。

This paper describes the bio-typing and rapid identification technique of E. tarda briefly and discusses the virulence factors of E. tarda elaborately, including adhesion related factors, enzymes involved in anti-phagocyte killing and serum resistance, toxins, type Ⅲ and type Ⅵ secretion systems, siderophores and PST operons, in order to provide reference in researches of pathogenic mechanisms and prevention of E. tarda.

文中对迟缓爱德华氏菌的生物分型、快速检测技术等进行了简要阐述，并对该病原菌的主要致病相关因子，包括黏附因子、抵抗宿主免疫机制的酶类、各种毒素、Ⅲ型和Ⅵ型分泌系统、载铁体及磷酸盐特异转运操纵子进行了详细阐述，以期为迟缓爱德华氏菌致病机理的进一步深入研究及其防治提供参考和借鉴。

The illumination is of no effect on the germination rate of oospores of Phytophthora sojae.30 single-oospore isolates obtained from the test strain of Phytophthora sojae Ps-H2 (Race 1 ) were evaluated using hypocotyl-inoculation method for race phenotype on soybean cultivars. One clone phenotype ( race 1 )was selected randomly for further isolation and virulence identify .

将大豆疫霉菌供试菌株Ps-H_2(生理小种1号)每代挑取30个单卵孢株，进行生理小种鉴定，随机挑选1株1号生理小种的单卵孢株继续进行单卵孢株分离和毒性鉴定，连续两代试验结果表明大豆疫霉菌原始菌株并朱出现毒性分化，表明原始菌株即为1号生理小种的毒性纯系。

Null mutant Δmnh6 produced appeared offwhite hyphae, showed reduction in growth, conidiation and appressorium formation, and also showed reduction in appressorium turgor pressure. And the hyphae were more readily wettable by a solution containing SDS and EDTA and more easily digested by fungal cell-wall-digesting enzymes. The appressoria produced by Δmnh6 mutants showed diminished host penetration and the infectious hyphae of Δmnh6 mutants showed reduced in planta growth. Targeted deletion of mnh6 resulted in the greatly reduced virulence capacity to barley and rice CO39 in infection assays.

突变子Δmnh6的菌落形态不同于野生型GUY11，菌落呈灰白色，菌丝稀疏，生长速度变慢，产孢菌丝细胞壁的溶剂疏水性消失，菌丝细胞壁容易被细胞壁降解酶降解，产孢减少，孢子形态变得细长，孢子的附着胞形成率降低，附着胞的膨压降低，附着胞对寄主植物表面的穿透能力减弱，侵入后生长速度减慢，喷雾接种后对大麦和水稻CO39的致病性消失。mnh6基因重新引入Δmnh6后，突变子的表型恢复。

From 18 species of host plants including cotton, eggplant, horseradish, broad bean etc.distributed in Jiangsu, Shandong, Siehuan, Liaonin, Hebei and Inner Mongolia were inoculated on seedlings of eggplant and tomato at room temperature to test their virulence differentiation.

自江苏、山东、四川、辽宁、河北及内蒙古等省的棉花、茄子、辣根，蚕豆等18种植物上分离的大丽轮枝菌，在温室条件下，测定了对茄子、番茄幼苗的致病力分化。

Alernata were related. Pathogenetic gene of the pathogen resulted in virulence variation.3.The lesion area expansion tendency of tobacco brown spot caused by A.

研究人工气候箱内烟草赤星病病斑扩展规律，结果表明，温度和保湿时间是影响赤星病病斑扩展的两个主要因素。

By chicken embryo, minimum concentration of medicine of directly inactivated test、 treatment test and preventive test is 7.5mg/ml、 62.5mg/mland 31.25mg/ml;By CEF, minimum concentration of resiting NDVF_(48)E_8 and moderate virulence strain is 10mg/ml、 50mg/ml and 25mg/ml. However,the result of complex prescriptionpreventing and curing NDVF48Ej$ is not ideal.

在鸡胚上抗病毒试验中，对三株病毒起直接灭活、治疗和预防作用的最低药物浓度分别为7.5mg/ml、62.5mg/ml和31.25mg/ml；在鸡胚成纤维细胞上抗病毒试验中，对强强毒株和中等毒力株起直接灭活、治疗和预防作用不引起细胞病变的最低药物浓度分别为10mg/ml、50mg/ml和25mg/ml。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。