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El compost es una fuente de microorganismos que pueden tener diferentes funciones en las plantas.
El objetivo fue evaluar el efecto de cepas de rizobacterias aisladas de compost de cachaza y gallinaza en plantas micropropagadas de caña de azúcar durante la aclimatación en invernadero. Se aislaron cepas de compost de cachaza+gallinaza (C1 = 25:75 v/v; C2 = 50:50 v/v; C3 = 75:25 v/v y C4 = 100:0 v/v) por la técnica de diluciones y siembra en placa. Las cepas aisladas fueron evaluadas por su capacidad de producir auxinas y solubilizar fosfatos. Las mejores cepas se identificaron a nivel molecular y se inocularon en plántulas micropropagadas de caña de azúcar. Se aislaron 63 cepas bacterianas y se seleccionaron 14 que presentaron mecanismos de promoción de crecimiento. Las cepas de bacterias identificadas molecularmente tuvieron alta similitud a 7 géneros: Bacillus, Enterobacter, Acinetobacter Achromobacter, Paenarthrobacter, Weizmannia y Staphylococus. La inoculación de rizobacterias en plantas de caña de azúcar, durante la fase de aclimatación, mostró que Achromobacter xylosoxidans CPOC56 y Acinetobacter vivianii CPOC48 incrementaron significativamente la altura (40 %), área foliar (107 %), volumen radi cal (124 %), peso seco (93 %) y contenido de nitrógeno (115 %) y fósforo (133 %), comparado con el testigo.
El compost de cachaza + gallinaza es un reservorio de rizobacterias promotoras de crecimiento vegetal, las 14 cepas seleccionadas con atributos benéficos pertenecieron a 11 especies distintas. Las cepas Achromobacter xylosoxidans CPOC56 y Acinetobacter vivianii CPOC48 son una buena opción para favorecer el crecimiento durante la fase de aclimatación de plantas micropropagadas de caña de azúcar
Compost is a source of microorganisms with different functions in plants. The objective was to evaluate the effect of rhizobacterial strains isolated from filter cake and chicken manure compost on micropropagated sugarcane plants during greenhouse acclimatization. Strains from composts obtained from mix of filter cake + chicken manure (C1 = 25:75 v/v; C2 = 50:50 v/v; C3 = 75:25 v/v and C4 = 100:0 v/v) were isolated by the technique of dilutions and spreading in plates. The isolated strains were evaluated for their ability to produce auxins and solubilize phosphates. The best strains were identified at the molecular level and inoculated into micropropagated sugarcane seedlings. 63 bacterial strains were isolated, of which 14 that presented growth promotion mechanisms were selected. The identified bacterial strains were highly similar to 7 genera: Bacillus, Enterobacter, Acinetobacter, Achromobacter, Paenarthrobacter, Weizmannia, and Staphylococus. The inoculation of rhizobacteria in sugarcane plants, during the acclimatization phase, showed that Achromobacter xylosoxidans CPOC56 and Acinetobacter vivianii CPOC48 significantly increased height (40 %), leaf area (107 %), root volume (124 %), dry weight (93 %), nitrogen (115 %) and phosphorus (133 %) content, compared with the control. The filter cake and chicken manure compost was a reservoir of plant growth-promoting rhizobacteria, the 14 selected strains with beneficial attributes belonged to 11 different species. The Achromobacter xylosoxidans CPOC56 and Acinetobacter vivianii CPOC48 strains are a good option to promote growth during the acclimatization phase of micropropagated sugarcane plants
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