Data/hora: 07/06/2024 11:26:14

Biblioteca(s): | Embrapa Agrobiologia.
Data corrente: | 08/07/1997
Data da última atualização: | 08/07/1997
Autoria: | KHAN, M. A.
Título: | Etiology of mungbean mosaic in the Philippines.
Ano de publicação: | 1985
Fonte/Imprenta: | Los Banos: University of the Philippines, Out., 1985.
Páginas: | 91p.
Série: | Tese de Mestrado.
Idioma: | Inglês
Notas: | Tese de Mestrado. Orientada por: Delfin B. Lapis.
Conteúdo: | The virus causing mungbean mosaic was isolated, purified and characterized from field infected mungbean plants, showed 20-30 percent natural infection depending on varieties/lines. The virus was readily transmitted by mechanical and biological means from mungbean to mungbean and to other hosts. Early of plant growth was found most susceptible to infection. Aphis craccivora was found to be the only vector able to transmit mungbean mosaic virus in a non-persistent manner with a minimum number of four five insects per plant. Findings of this study show that the virus was transmitted throught the seeds but not throught the soil. Noreover, the earlier the plant gets infected by the virus, the higher the percent of infected seeds. No seed transmission was observed when the plant got infected 40 days after emergence. The virus had a very limited host range most of which belong to the family Leguminoseae. Local lesion hosts were Vigna sesquipedalis and Nicotiana glutinosa. The virus can retain infectivity at a dilution of up to 10-4, thermal inactivation point at 10 minutes exposure at 70 graus C and longevity in crude sap at room temperature and refrigerated condition were 12 and 35 days, respectively. Among the purification procedures tested, clarification with 8,5% n butanol plus isoelectric point precipitation yielded a good amount of virus particles. Electron micrographs analysis showed that, two types of virus particles were associated with the disease, one is smaller isometric particles measuring 25-28 nm in........
Palavras-Chave: | Grain legumes; Graos; Transmissao.
Thesagro: | Etiologia; Feijão Mungo; Leguminosa; Mosaico; Vírus.
Thesaurus Nal: | disease transmission; etiology; mung beans; plant viruses.
Categoria do assunto: | --
Registro original: | Embrapa Agrobiologia (CNPAB)
Exemplares: | CNPAB - (25173-1) - ADD - TS - -- - 633.3 - K45e - 1988.00017 - DIS