Data/hora: 21/06/2024 23:52:13

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 06/09/1995
Data da última atualização: | 06/09/1995
Autoria: | SIEVERDING, E.; TARO T, S.
Afiliação: | Centro Internacional de Agricultura Tropical (CIAT), Cali, Colombia.
Título: | Influence of Soil Water Regimes on VA Mycorrhiza V. Performance of Different of Different VAM Fungal Species with Cassava.
Ano de publicação: | 1988
Fonte/Imprenta: | Agronomy & Crop Science, v.161, p. 322-332, 1988.
ISSN: | 0931-2250
Idioma: | Inglês
Conteúdo: | A greenhouse trial was conducted with cassava inoculated with seven diferent VAM fungal species, i.e. Acaulospora longula, A. mycrocarpa, Entrophospora colombiana, Glomus fasciculatum, G. manibatis, G. ocultum and Scutellospora  beterogama. A wet and a dry soil water refgime was established to study the effect of water stress on performance of these fungi with a drought tolerant cassava clone. At harvest, N, P, and K concentration was analysed in leaves, petioles, stems and roots. In unstressed plants, five endophytes were effective whereas in stressed plants only three fungi improved growth beyond the non-mycorrhizal control. these were E. colombiana, G. manibatis and G. ocultum which were most effictive for P uptake under stress. differential effects of     VAM fungal species on root lenght and K uptake were found. A mycriocarpa caused the greatest increase in lenght of feeder roots and G. occultum was one of the most effective for K uptake under both water regimes even though these fungi were not the most effctive for dry matter production. Under each water regime, the concentration of N, P and K in leaves, petioles, stems and roots was influenced by the fungal species. Mycorrhizal endophytes differed in tolerance to dry soil conditions as found by root infection ratings. From the results it can be concluded that in addition to the improved P nutrition the enhanced root length and K uptake by VAM fungi may be important for drought tolerance of cassava.
Palavras-Chave: | Acaulospora spp; Entrophospora sp; Glomus spp; Nutrient concentrations; Scutellospora sp.
Thesaurus Nal: | water stress.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (16024-1) - ADC - SP - -- -  -  - 10.166 - DIS