Data/hora: 01/06/2024 07:46:17

Biblioteca(s): | Embrapa Cerrados.
Data corrente: | 15/04/1997
Data da última atualização: | 15/04/1997
Autoria: | MIRANDA, J. C. C. de; HARRIS, P. J.
Título: | Effects of soil phosphorus on spore germination and hyphal growth of arbuscular mycorrhizal fungi.
Ano de publicação: | 1994
Fonte/Imprenta: | New Phytologist, v.128, p.103-108, 1994.
Idioma: | Inglês
Conteúdo: | The direct effects of soil phosphorus on spore germination and hyphal growth of the arbuscular mycorrhizal fungi (AM), Glomus etunicatum Beck. & Gerd., E3 and Scutellospora heterogama (Nicol. & Gerd.) Walker & Sanders, were investigated by means of two soil-agar place experiments. In the experiment, the percentage spore gemination and  hyphal length of G. etunicatum, measured at ten different P levels and three periods of incubation, were affected by the P status of the soil. The best correlation with P level in the soil occurred at 7 d of incubation for spore germination and at 14 d for hyphal growth and hyphal growth increment. Spore germination was stimulated when 12-5/ug P g1 was applied to the soil and decreased with further soil P increments. Hyphal growth decreased significantly with soil P amendments above 37.5ug Pg-1. in the second experiment including three different P levels and the three AM endophytes, soil P affected spore germination and hyphal growth, and both decreased at the high phosphate treatment for G. etunicatum and S. heterogama. The E3 spore germination was similar to the other two species, but the hyphal growth was poorer. S. heterogama was more sensitive to P fertilzation than Glomus spp. and for the three species the hyphal production was not proportional to spore size.
Palavras-Chave: | Arbuscular mycorrhizae; Micorriza arbuscular; Scutellospora heterogama.
Thesagro: | Cerrado; Fósforo; Glomus Etunicatum; Solo.
Thesaurus Nal: | phosphorus; soil.
Categoria do assunto: | --
Registro original: | Embrapa Cerrados (CPAC)
Exemplares: | CPAC - (9647-1) - UPC - SP - -- - CRI4250 -  - CRI4250 - DIS