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Your search keyword '"Rosas, Susana B."' showing total 21 results
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21 results on '"Rosas, Susana B."'

19. Effect of phosphorous solubilizing bacteria on the rhizobia-legume simbiosis.

Author

Velázquez, E., Rodríguez-Barrueco, C., Rosas, Susana B., Rovera, M., Andrés, J. A., and Correa, N. S.

Abstract

Alfalfa and soybean are the most important leguminous plants in the agricultural system of the semi-arid region of Argentina. The possible action of phosphorous solubilizing bacteria on the leguminous-rhizobia simbiosis was studied since in this region the available phosphorous distribution (Pd) is not uniform. The strains used were Sinorhizobium meliloti 3DOh13, excellent solubilizer of Fe and P for alfalfa, Bradyrhizobium japonicum TIIIB for soybean and two strains of Pseudomonas putida (Sp21 and Sp22) solubilizers of P for the treatments on growth promotion through an improvement in the nodulation and biological nitrogen fixing activity. The rhizobia strains assayed are capable of coexisting with Pseudomonas, with meaningful differences being observed in percentage of nodulation and air portion in co-inoculated soybean. [ABSTRACT FROM AUTHOR]

Published
2007
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20. Evaluation of Pseudomonas chlororaphis subsp. aurantiaca SR1 for growth promotion of soybean and for control of Macrophomina phaseolina.

Author

Rovera, Marisa, Pastor, Nicolás, Niederhauser, Marina, and Rosas, Susana B.

Subjects
PSEUDOMONAS, PLANT growth, SOYBEAN, MACROPHOMINA phaseolina, BIOLOGICAL pest control agents, ANTIFUNGAL agents, HYDROCYANIC acid
Abstract

Pseudomonas chlororaphissubsp.aurantiacaSR1 was evaluated for control ofMacrophomina phaseolina in vitroand in soybean plants, for growth promotion of soybean plants and for production of antifungal compounds. Strain SR1 caused a significant inhibition ofM. phaseolina in vitroand reduced damping-off in thein vivoassays. In addition, strain SR1 significantly increased shoot and root length and shoot and root dry weight of soybean plants inM. phaseolinainfested soil, as compared to control plants in infested soil. Fragments for the phenazine-1-carboxylic acid, pyrrolnitrin and hydrogen cyanide encoding genes were amplified from the DNA of strain SR1 after polymerase chain reaction (PCR) assays with specific primers. Thus, this study establishes thatP. chlororaphissubsp.aurantiacaSR1 provides control ofM. phaseolina in vivoand suggests that strain SR1 might be applied as an effective biocontrol agent to protect soybean plants from this phytopathogen. [ABSTRACT FROM AUTHOR]

Published
2014
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