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EnglishRhizobacteria (2808) were isolated on Pseudomonas-selective S1 medium from two maize inbred lines and from their hybrid at three plant growth stages. Positive phlD hybridization was found for 364 of them. The PhlD+ isolates were significantly more numerous in the rhizosphere of the hyrid than in those of parental lines. Furthermore, the frequency of PhlD+ was significantly higher for the hybrid at the flowering stage. An amplified rDNA restriction analysis showed that the hybrid genotype also increases the genetic diversity of PhlD+ populations when compared with its inbred parent lines, and this could be an effect of heterosis. Influence of the hybrid on the frequency and diversity of the bacterial PhlD+ population varied along the plant growth stage.
| Titolo: | Frequency and biodiversity of 2,4-diacetylphloroglucinol-producing rhizobacteria are differentially affected by the genotype of two maize inbred lines and their hybrid. |
| Autore/i: | PICARD, CHRISTINE; FRASCAROLI, ELISABETTA; BOSCO, MARCO |
| Autore/i Unibo: | |
| Anno: | 2004 |
| Rivista: | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.femsec.2004.03.016 |
| Abstract: | Rhizobacteria (2808) were isolated on Pseudomonas-selective S1 medium from two maize inbred lines and from their hybrid at three plant growth stages. Positive phlD hybridization was found for 364 of them. The PhlD+ isolates were significantly more numerous in the rhizosphere of the hyrid than in those of parental lines. Furthermore, the frequency of PhlD+ was significantly higher for the hybrid at the flowering stage. An amplified rDNA restriction analysis showed that the hybrid genotype also increases the genetic diversity of PhlD+ populations when compared with its inbred parent lines, and this could be an effect of heterosis. Influence of the hybrid on the frequency and diversity of the bacterial PhlD+ population varied along the plant growth stage. |
| Data prodotto definitivo in UGOV: | 2005-10-14 20:14:24 |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
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http://hdl.handle.net/11585/904
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