RESUMOO vírus do amarelo letal do mamoeiro ("Papaya lethal yellowing virus", PLYV) é responsável por uma das principais doenças do mamoeiro (Carica papaya) no Nordeste brasileiro. O PLYV pode ser transmitido por solo, água, instrumentos de corte contaminados e por inoculação mecânica em condições experimentais. Na presente pesquisa, avaliou-se a transmissão do PLYV por mãos contaminadas e sua presença em embriões de sementes de frutos infetados. O PLYV foi transmitido por mãos contaminadas, e mãos contaminadas e lavadas em água corrente revelando elevada estabilidade. Experimentos com 1.128 embriões de sementes obtidas de frutos infetados com o vírus revelaram a ausência do PLYV, cuja presença foi constatada em 112 tegumentos das 670 sementes analisadas. O PLYV não foi perpetuado por plantio direto de sementes, envolvendo 310 plântulas e 362 mudas, comprovando não ser o mesmo transmitido por semente de forma embrionária. De outra parte, a presença do PLYV foi comprovada por Elisa indireto em 49 de 456 sementes per si testadas.Palavras-chave adidionais: Carica papaya, PLYV, Tombusviridae, Papaya lethal yelloing virus. ABSTRACT Transmission by contaminated hands and absence of embryonary seed transmission of Papaya lethal yellowing virusThe "Papaya lethal yellowing virus" (PLYV) is responsible for an important disease of papaya (Carica papaya) in Northeast Brazil. PLYV can be transmitted by soil, water and contaminated cutting instruments, as well as through mechanical inoculation. The objective of the present work was to evaluate the possibility of the virus transmission by contaminated hands, and its presence in the embryos of infected papaya fruit seeds. The virus was transmitted through contaminated hands, thus revealing that PLYV is very stable. Experiments with embryos from 1,128 seeds of infected fruits revealed the absence of PLYV in the embryos from seeds of infected fruits, although the virus was present in 112 out of the 670 seed peel samples analyzed. Direct planting of seeds from infected fruits, involving 310 seedlings and 362 plant-seedlings, did not perpetuate PLYV, demonstrating that the virus is not transmitted in the embryo of the seeds. On the other hand, PLYV was detected by indirect Elisa in 49 out of 456 seeds per si.
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