Termos para indexação: tratamento de sementes; potencial fisiológico; patologia; Lycopersicon esculentum Mill. RELATIONSHIPS BETWEEN THERMAL TREATMENT, GERMINATION, VIGOR AND HEALTH OF TOMATO SEEDSABSTRACT -Thermal treatment presents great potential on the alternative control of seed pathogens. However, there are few studies on this technology and, particularly, on its effect on the performance of seeds, especially vegetable seeds. This research aimed to study the relation of thermal treatment to the physiological potential and health of tomato seeds, identifying effective combinations of temperature and exposure time by health and vigor tests. In experiment I, seeds from 2 lots of cultivar UC-82 were treated with hot water (52, 53, 54, 55 and 60 ºC for 30 and 60 min) and dried for 72 h. In addition to two controls (chemically treated seeds and non-treated seeds), all treatments were evaluated in two periods by health, germination and vigor tests. In experiment II, seeds treated with hot water at 55 ºC/30 min and 60 ºC/60 min, were dried for 12 h. These treatments, and the controls
Ao Prof. Dr. Carlos Tadeu dos Santos Dias e ao doutorando em estatística Ricardo Olinda pelas orientações e empenho nas análises estatísticas. À empresa Sakata Seed Sudamerica Ltda, pela estrutura e colaboração e às empresas Isla Sementes Ltda e Agristar do Brasil pelas sementes fornecidas. Ao Professor Dr. José Rogério de Oliveira, coordenador do Laboratório de Bacteriologia de Plantas da UFV e equipe pela identificação da bactéria e orientações. Aos funcionários da biblioteca Central da ESALQ/USP e, em especial, as bibliotecárias Sílvia Maria Zinsly, pelo apoio e incentivo, e Eliana Maria Garcia pela presteza na correção das referências bibliográficas. Ao Gerente Geral da Korin Preservação e Recuperação do Meio-KMA, Hiroshi Ota, e à Bióloga Sakae Kinjo pela amizade e por terem me apoiado e incentivado no início dessa jornada e pela contribuição na tradução.
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