Natural occurrence of Azospirillum brasilense in petunia with capacity to improve plant growth and flowering
- Toffoli, Lucía Mercedes
- Martinez Zamora, Martin Gustavo
- Medrano, Norma Nelly
- Fontana, Cecilia A.
- Lovaisa, Nadia Carolina
- Delaporte Quintana, Paola Adriana Georgina
- Elías, Juliana María
- Salazar, Sergio Miguel
- Pedraza, Raúl Osvaldo
DOIAbstract
To evaluate the natural occurrence of the plant growth-promoting bacterium Azospirillum brasilense and petunia plants, local strains were isolated and characterized by biochemical and molecular methods. Three strains were assessed in greenhouse conditions using Petunia × hybrida Ultra™. Treatments: Plants without bacterial inoculation or chemical fertilization; fertilized with NPK and KNO3; and independently inoculated with the strains 2A1, 2A2, and 2E1 by submerging their roots in a bacterial suspension (~106 CFU·ml−1). Root length, dry weight of roots and shoots, leaf area, leaf greenness, and nutrient content were evaluated. The number of days from transplanting to the opening of the first flower and the number of flowers per plant were ...
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