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Master's Dissertation
DOI
https://doi.org/10.11606/D.11.1978.tde-20240301-152940
Document
Author
Full name
Nicésio Filadelfo Janssen de Almeida Pinto
Institute/School/College
Date of Defense
Published
Piracicaba, 1978
Supervisor
Title in Portuguese
Metodologia de inoculação e proteção cruzada de Verticillium albo-atrum Reinke & Bert. em tomateiro (Lycopersicon esculentum Mill.)
Keywords in Portuguese
FUNGOS FITOPATOGÊNICOS
INOCULAÇÃO
MURCHA DE VERTICILLIUM
PROTEÇÃO CRUZADA
TOMATE
Abstract in Portuguese
O autor estudou diferentes métodos de inoculação de Verticillium albo-atrum em tomateiro, para subsidiar o desenvolvimento de trabalhos, visando a obtenção de resistência à murcha de Verticillium. Também estudou proteção cruzada entre 2 isolados, com diferentes graus de patogenicidade. Os trabalhos foram conduzidos em casa de vegetação com controle parcial de temperatura. Os métodos de inoculação foram conduzidos em épocas diferentes e não puderam ser estatisticamente comparados. O método de mergulho de raízes, em suspensão conidial, mostrou-se muito drástico, com plantas enfezadas e precocidade na exteriorização de sintomas. Possivelmente se mostrará o melhor quando for comparado simultaneamente com os métodos de infestação do solo com conídios, infestação do solo com microescleródios, infestação de sementes com conídios e infestação de sementes com microescleródios. Contudo, a afirmativa é puramente especulativa. A interação dos dois isolados de V. albo-atrum promoveu alto nível de proteção cruzada em tomateiro, quando o isolado pouco patogênico teve sua concentração conidial 10 e 100 vezes maior que a do isolado muito patogênico.
Abstract in English
Methods of inoculating Verticillium albo-atrum in tomatoes were investigated with the objective of supplementing other studies in trying to obtain resistance to wilt due to Verticillium. Also investigated was the effects of cross-protection by two isolates with different degrees of pathogenicity in the same host plant. All the experiments were carried out in a greenhouse whose temperature could be partially controlled. Methods of inoculation were realized during different seasons and therefore they cannot be compared statistically. Pricking roots of tomato plants kept in conidial suspension provoked a very drastic reaction in these plants; they suffered very heavily and the appearance of external symptoms was very rapid. Most likely this method would have been better appreciated if it had been executed simultaneously with other methods of infesting the soil with microesclerotia, infestation of seeds with conidia or microesclerotia; however, this is purely speculative. The interaction of two isolates of V. albo-atrum induced a high degree of cross-protection in tomatoes when the conidial concentration of the less pathogenic isolate was 10 and 100 times more than that of the more pathogenic one.
 
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Publishing Date
2024-03-14
 
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