Utilization of organic phosphorus sources by oilseed rape, sunflower, and soybean

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We evaluated the ability of Brassica napus L. [oilseed rape], Helianthus annus L. [sunflower], and Glycine max L. [soybean] plants grown inoculated with or without bacteria to utilize organic P sources. Plants were supplied with inorganic [dibasic sodium phosphate] and organic P sources [phytate and...

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Detalles Bibliográficos
Otros Autores: Belinque Halperin, Hernán Pablo, Pucheu, Norma Lucrecia, Kerber, Norma Lucía, Rubio, Gerardo
Formato: Artículo
Lenguaje:Español
Materias:
PSEUDOMONAS FLUORESCENS
PHYTATE
PHOSPHORUS ACQUISITION
HELIANTHUS ANNUUS
HELIANTHUS
GLYCINE MAX
BRASSICA NAPUS
BACILLUS AMYLOLIQUEFACIENS
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2015belinque.pdf
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Biblioteca Central (FAUBA) de Universidad de Buenos Aires
Descripción
Sumario:We evaluated the ability of Brassica napus L. [oilseed rape], Helianthus annus L. [sunflower], and Glycine max L. [soybean] plants grown inoculated with or without bacteria to utilize organic P sources. Plants were supplied with inorganic [dibasic sodium phosphate] and organic P sources [phytate and glucose phosphate] at three concentrations and grown for 40 d under sterile conditions. Three inoculation treatments were compared: control [non-inoculated plants], inoculation with Bacillus amyloliquefaciens BNM340, and inoculation with Pseudomonas fluorescens BNM296 [two bacteria with proven phytase activity]. Oilseed rape, sunflower and soybean could utilize organic P sources. For example, when phytate [0.5 mM] P was used as the external P source, the increase factors over the no-P treatments were 4.5, 1.4, and 1.4 for oilseed rape, sunflower, and soybean P uptake, respectively. When glucose 1-phosphate disodium salt [G1P, 0.5 mM] was the P source, the increase factors were 8.8, 1.7, and 1.9 respectively. Positive responses to the organic P sources were found for the biomass accumulation of oilseed rape and soybean but not for sunflower. The inoculation with bacteria did not exert a promoting effect on P uptake. We demonstrate that the three species can effectively use organic P sources. The existence of crop plants that are more efficient in the utilization of different soil P sources would be particularly beneficial to improve P recycling and use of P fertilizers in agriculture.
ISSN:1436-8730

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