Resumo

FUNDORA, L. R et al. Estabilidad de la eficiencia de la cepa Glomus mosseae en la respuesta del tomate a condiciones de estrés hídrico fuera de su periodo óptimo. cultrop [online]. 2008, vol.29, n.4, pp. 47-53. ISSN 0258-5936.

Among the ecological alternatives reducing water stress effects, the arbuscular mycorrhizal fungal inoculation has been put into practice. Deepening into this subject, the work was aimed to test the stability of G. mosseae efficiency on tomato behaviour, growing out of its optimal period under water deficit conditions. Thus, two experiments were carried out under semi-controlled conditions, within half-late and late periods for tomato crop, inoculated and non-inoculated plants being subjected to water stress. Some variables related to mycorrhizal activity, plant growth and its water status were determined. The following indicators were evaluated: root colonization per arbuscular mycorrhizal fungi (% Col), visual density (DV), total dry weight as well as of leaves, stems and roots (g), foliar area (Sf) and water potential (y). Results proved strain efficiency per each indicator evaluated, which were higher in inoculated plants compared to non-inoculated ones, even though they were cultivated out of the optimal period. This experience suggests certain strain-crop specificity and particularly the best tomato development in symbiosis with G. mosseae under the studied conditions.

Palavras-chave : fungi; Glomus; tomato; drought stress; plant response.