摘要:

AbstractMultiplication ofPseudomonas phaseolicolawas determined in 17 different bean cultivars (Phaseolus vulgaris) and 9 other plant species, and the effect of different inoculation methods and conditions was also studied.In susceptible leaves, a generation time of 2.1 h was determined in the early phase (2 days after inoculation). Different multiplication rates in susceptible and resistant leaves were clearly observed 4 days after inoculation. At this time the first small water‐soaked spots were visible in the susceptible cultivars. Bacteria multiplied up to the 7th day after inoculation with a maximum of 109cells per cm2leaf (equal to ca. 4 × 1010bacterial cells/cm3). At the same time, the water‐soaked spots had reached their maximum size in most cases. Thus, bacterial multiplication and development of water‐soaked spots paralleled each other.In resistant leaves, no water‐soaked spots appeared, and the final bacterial concentration was 1/1000–1/100 of that in susceptible leaves. Gomparison of races 1 and 2 in several bean cultivars indicated the non‐existence of a gene‐for‐gene relationship with this disease. Old leaves were less susceptible to infection. Some bacterial multiplication was also observed in non‐host plants. There was a general correlation between bacterial multiplication in the non‐host plants and their botanical relation

ISSN:0931-1785    

DOI:10.1111/j.1439-0434.1984.tb00780.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractReasons are given why the term “virus‐like particle” should not be used when describing viruses of the cryptic group. Also, an attempt is made to define viruses taking into consideration recent know

ISSN:0931-1785    

DOI:10.1111/j.1439-0434.1984.tb00781.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

Book reviewed in this article:Hanf, M., Ackerunkräuter Europas mit ihren Keimlingen und Samen. 2. Auflage. Verlagsunion Agrar.Cooper, J. I., and F. O. MacCallum, Viruses and the Environment.Oltmann, W., M. Burba und G. Bolz, Die Qualität der Zuckerrübe. Bedeutung, Beurteilungskriterien und züchterische Maßnahmen zu ihrer Verbesserung. „Fortschrittc der Pflanzenzüchtung, Heft 12”.Diercks, R., Alternativen im Landbau. Eine kritische Ges

ISSN:0931-1785    

DOI:10.1111/j.1439-0434.1984.tb00782.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY