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root rot pathogen fusarium
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  相似匹配句对
     ON THE ROOT ROT OF SWEETPOTATO
     甘薯根腐病的初步研究
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     STUDIES ON THE ROOT ROT OF WHEAT
     小麦根腐病的研究 Ⅰ病原菌种类和新种的形态特征
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     THE PATHOGENS OF SOYBEAN ROOT ROT
     大豆根腐病原菌
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     Root
     根
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     ,root rot(Fusarium sp.)
     、根腐病(Fusariumsp.)
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  root rot pathogen fusarium
Phylogenetic relationships between the lettuce root rot pathogen Fusarium oxysporum f.
      


Soybean cultivars and lines 861387 10, Ludou No 4, 8205, RN 9, 861003, Peking were selected as differential hosts for pathogenicity tests. 37 isolates of soybean root rot pathogen ( Fusarium solani ) collected from Shandong, Anhui, Henan and Jingsu provinces were divided into 10 groups based on the virulence on 6 differentials.

从50个大豆品种中选择对J5菌株抗感不同的6个大豆品种861387-10、鲁豆4号、8205、RN-9、861033和北京黑豆作为鉴别寄主,根据采自山东、河南、安徽和江苏等地的37个大豆根腐病(Fusariumsolani)主要致病菌在6个大豆品种上的反应,其致病菌可初步分为10个致病类型

The antagonism of two strains B1 and B2 of Bacillus spp. against pea root rot pathogen Fusarium oxysporum f. sp. pisi was studied. The result of pairing culture showed that B1 and B2 strains of Bacillus spp. had strong antifungal activity to the pathogen. The colonial color of the pathogen changed from gray to white, aerial hyphas increased and entangled into group after treatment with the cell-free fermentational filtrate of B1 or B2. Observation under optical microscope showed that hyphas...

The antagonism of two strains B1 and B2 of Bacillus spp. against pea root rot pathogen Fusarium oxysporum f. sp. pisi was studied. The result of pairing culture showed that B1 and B2 strains of Bacillus spp. had strong antifungal activity to the pathogen. The colonial color of the pathogen changed from gray to white, aerial hyphas increased and entangled into group after treatment with the cell-free fermentational filtrate of B1 or B2. Observation under optical microscope showed that hyphas and spores of the pathogen swelled and distorted with concentrated cytoplasm after treatment, the spores could not germinate or germinated abnormally . A lot of vesicles appeared at the top of the hyphas, and the hyphas stopped growing and broke finally, their cytoplasm spilled from the cell. The cell-free fermentational filtrate of B1 or B2 strains contained 1795.53μg/mL and 1345.93μg/mL protein respectively, from which two antifungal proteins of 103.5 kD (B1 ) and 127.6 kD (B2) were purified.

同、异步培养结果表明:芽孢杆菌B1、B2对豌豆尖孢镰孢菌(Fusarium oxysporumSchl f.sp.pisi)有很强的抑菌作用。经B1、B2无菌液处理后的病原菌由灰白色变为白色,气生菌丝增多且纠结成团。抗菌显微特征是:导致病菌孢子和菌丝体膨大、畸形、原生质凝聚、孢子不萌发或萌发异常、菌丝生长点产生大量泡囊、生长受阻,后期菌丝体断裂、泡囊破裂、原生质外泄。B1、B2无菌液中蛋白含量分别为1795.53μg/mL和1345.93μg/mL,各含一种抗菌蛋白,其分子量分别为103.5kD(B1)和127.6kD(B2)。

The pathogenicity of 19 strains was assessed,which were isolated from root rot pathogen(Fusarium)of Astragalus adsurgens in different areas.The results showed that the pathogenicity of different species for its root rot pathogens was different in Astragalus adsurgens.The pathogenicity of Fusarium oxysporum was virulence one;Fusarium solani next and Fusarium moniliforme was the weakest one.Meanwhile the pathogenicity of different strains in Fusarium...

The pathogenicity of 19 strains was assessed,which were isolated from root rot pathogen(Fusarium)of Astragalus adsurgens in different areas.The results showed that the pathogenicity of different species for its root rot pathogens was different in Astragalus adsurgens.The pathogenicity of Fusarium oxysporum was virulence one;Fusarium solani next and Fusarium moniliforme was the weakest one.Meanwhile the pathogenicity of different strains in Fusarium was different in same cultivar.The pathogenicity of Fusarium had virulence variation in Astragalus adsurgens,but there was no relationship between pathogenicity and regional distribution.

通过对分离自不同地区的沙打旺根腐病菌19个菌株的致病力测定得知:不同种的根腐病菌对沙打旺的致病力不同,尖孢镰刀菌的致病力较强,茄病镰刀菌次之,串珠镰刀菌的致病力最弱;同种根腐病菌的不同菌株其致病力也有一定差异,证明沙打旺根腐病菌存在着致病力的分化。菌株的致病力与地区分布没有关系。

 
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