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Effect of inoculation with a strain of Pseudomonas fragi in the growth and phosphorous content of strawberry plants.

AuthorsMartín, L.; Velázquez, Encarna CSIC ORCID; Rivas, Raúl CSIC ORCID; Mateos, Pedro F. CSIC ORCID; Martínez Molina, Eustoquio CSIC ORCID; Rodríguez Barrueco, Claudino CSIC; Peix, Álvaro CSIC ORCID
KeywordsPhosphate solubilization
Plant growth promotion
Issue Date2007
CitationFirst International Meeting on Microbial Phosphate Solubilization. Developments in Plant and Soil Sciences. Editors E. Velázquez, C. Rodríguez-Barrueco. Volume 102. 2007, p: 309-3153-336
AbstractWithin genus Pseudomonas, several species are able to solubilize phosphate in plates and some of these species are also able to mobilize phosphorous to plants. In this work we isolated a strain, SAPA2, from the rhizosphere of barley plants growing in a soil from Northern Spain. This strain was able to solubilize phosphates in plates forming great halos of solubilization in 24 h. Moreover, this strain retained its ability to solubilize phosphate after five culture passes. The 16S rRNA sequence of this strain showed a similarity of 99.9% with that of Pseudomonas fragi. The inoculation of strawberry plants with this strain was carried out in growth chamber applying 10 ml of a suspension containing 108 UFC/ml to each plant. According to the results obtained, the plants inoculated with this strain growing in a soil amended with insoluble phosphate had a phosphorous content significantly higher than uninoculated plants growing in soil with or without insoluble phosphates. Therefore, the strain SAPA2 promotes phosphorous mobilization to strawberry plants. Therefore, the inoculation of plants with suitable phosphate solubilizing bacteria can increase the crop yield and allows a better exploitation of natural soil resources.
DescriptionFirst International Meeting on Microbial Phosphate Solubilization. Salamanca, Spain, 16-19 july 2002. 7 p.
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