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Título: | A rhizobacterium modifies plant and soil responses to the mycorrhizal fungus Glomus mosseae |
Autor: | Andrade, Galdino; Azcón González de Aguilar, Rosario CSIC ORCID ; Bethlenfalvay, Gabor J. | Fecha de publicación: | 1995 | Editor: | Elsevier | Citación: | Applied Soil Ecology 2(3): 195-202 (1995) | Resumen: | The effects of a rhizobacterium (Bacillus sp. strain BH-II) on plant (Pisum sativum L.) parameters (biomass, root/shoot ratio, seed/plant ratio), on root colonization by a vesicular-arbuscular mycorrhizal (VAM) fungus (Glomus mosseae) and on the formation of water-stable soil aggregates were investigated in two soils in a greenhouse pot study. The soils were a grey silt-loam of high P and a yellow clay-loam of low P content. The rhizobacterium had no significant effect on plant biomass production in either soil in the absence of the VAM fungus, but decreased plant growth by more than 30% in its presence. It enhanced the root/shoot and seed/plant ratios in plants of both VAM and non-VAM treatments. Without the VAM fungus, both soils disaggregated. This slaking of water-stable aggregates (over 0.5 mm) was significantly less severe when the rhizobacterium was present. With the VAM fungus, aggregation increased up to 27% during the experiment, but the rhizobacterium did not affect this process significantly. It is concluded that rhizo-organisms acting in concert may have both positive and negative effects on the plant and soil components of an agrosystem. | Versión del editor: | https://doi.org/10.1016/0929-1393(95)00054-O | URI: | http://hdl.handle.net/10261/278083 | DOI: | 10.1016/0929-1393(95)00054-O | ISSN: | 0929-1393 |
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