Abstract
Seven phosphate-mobilizing pseudomonads were isolated, identified, and characterized in terms of their biofertilizer potential and root-colonizing properties. Pseudomonas protegens (ex-fluorescens) CHA0 was used for comparative purposes. Four isolates (LF-MB1, LF-P1, LF-P2, and LF-P3) clustered with members of the “Pseudomonas fluorescens complex,” whereas the other three (LF-MB2, LF-V1, and LF-V2) clustered with members of the “Pseudomonas putida/Pseudomonas aeruginosa complex.” Assays in buffered liquid growth medium supplemented with tricalcium phosphate enabled the separation of the isolates into two groups: group A (LF-P1, LF-P2, LF-P3, and LF-V1) solubilized P from 151 up to 182 μg mL−1, and group B (LF-MB1, LF-MB2, and LF-V2) solubilized less than 150 μg P mL−1. All isolates displayed acid and alkaline phosphatase activities. With the exception of LF-MB2, all isolates were able to degrade phospholipids from lecithin. Additionally, all isolates exhibited extracellular protease activity, and four isolates produced hydrogen cyanide, two traits that are related to biocontrol of phytopathogens. To study root colonization in non-sterile soil, isolates were doubly tagged with gfp and a tetracycline resistance cassette. After 15 days of competition with the indigenous bacterial flora, all tagged isolates colonized soybean roots at counts ranging from 7.6 × 105 to 1.7 × 107 CFU g−1. The results indicate that there are already efficient phosphate-mobilizing pseudomonads adapted to agricultural bulk soils under no-till management in Argentina and thus having excellent potential for use as biofertilizers.
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Abd-Alla MH (1994) Use of organic phosphorus by Rhizobium leguminosarum biovar. viceae phosphatases. Biol Fert Soils 18:216–218. doi:10.1007/BF00647669
Agaras B, Wall LG, Valverde C (2011) Specific enumeration and analysis of the community structure of culturable pseudomonads in agricultural soils under no-till management in Argentina. Appl Soil Ecol. doi:10.1016/j.apsoil.2011.11.016
Ahmad F, Mabood Husain F, Ahmad I (2011) Rhizosphere and root colonization by bacterial inoculants and their monitoring methods: a critical area in PGPR research. In: Ahmad I, Ahmad F, Pichtel J (eds) Microbes and microbial technology: agricultural and environmental applications. Springer, New York, pp 363–391. doi:10.10077978-1-4419-7931-5_14
Álvarez CR, Torres Duggan M, Chamorro E, D’ambrosio D, Taboada MA (2009) Descompactación de suelos franco limosos en siembra directa: efectos sobre las propiedades edáficas y los cultivos. Cienc Suelo 27:159–169
Barrett M, Morissey JP, O’Gara F (2011) Functional genomics analysis of plant growth-promoting rhizobacterial traits involved in rhizosphere competence. Biol Fertil Soils 47:729–743. doi:10.1007/s00374-011-0605-x
Beauchamp CJ, Kloepper JW (2003) Spatial and temporal distribution of a bioluminescent-marked Pseudomonas putida on soybean root. Luminescence 18:346–351. doi:10.1002/bio.747
Bodilis J, Hedde M, Orange N, Barray S (2006) OprF polymorphism as a marker of ecological niche in Pseudomonas. Environ Microbiol 8:1544–1551. doi:10.1111/j.1462-2920.2006.01045.x
Browne P, Rice O, Miller SH, Burke J, Dowling DN, Morrissey JP, O’Gara F (2009) Superior inorganic phosphate solubilization is linked to phylogeny within the Pseudomonas fluorescens complex. App Soil Ecol 43:131–138. doi:10.1016/j.apsoil.2009.06.010
Campitelli P, Aoki A, Gudelj O, Rubenacker A, Sereno R (2010) Selección de indicadores de calidad de suelo para determinar los efectos del uso y prácticas agrícolas en un área piloto de la región central de Córdoba. Cienc Suelo 28:223–231
Cantú MP, Becker A, Camilo Bedano J, Schiavo HF (2007) Evaluación de la calidad de suelos mediante el uso de indicadores e índices. Cienc Suelo 25:173–178
Chung H, Park M, Madhaiyan M, Seshadri S, Song J, Cho H, Sa T (2005) Isolation and characterization of phosphate solubilizing bacteria from the rhizosphere of crop plants of Korea. Soil Biol Biochem 37:1970–1974. doi:10.1016/j.soilbio.2005.02.025
Cole JR, Wang Q, Cardenas E, Fish J, Chai B, Farris RJ, Kulam-Syed-Mohideen AS, McGarrell DM, Marsh T, Garrity GM, Tiedje JM (2009) The Ribosomal Database Project: improved alignments and new tools for rRNA analysis. Nucleic Acids Res 37:141–145. doi:10.1093/nar/gkn879
Collavino MM, Sansberro PA, Mroginski LA, Aguilar OA (2010) Comparison of in vitro solubilization activity of diverse phosphate-solubilizing bacteria native to acid soil and their ability to promote Phaseolus vulgaris growth. Biol Fertil Soils 46:727–738. doi:10.1007/s00374-010-0480-x
De Freitas JR, Banerjee MR, Germida JJ (1997) Phosphate-solubilizing rhizobacteria enhance the growth and yield but not phosphorus uptake of canola (Brassica napus L.). Biol Fertil Soils 24:358–364. doi:10.1007/s003740050258
De Souza JT, Mazzola M, Raaijmakers JM (2003) Conservation of the response regulator gene gacA in Pseudomonas species. Environ Microbiol 5:1328–1340. doi:10.1046/j.1462-2920.2003.00438.x
De Werra P, Péchy-Tarr M, Keel C, Maurhofer M (2009) Role of gluconic acid production in the regulation of biocontrol traits of Pseudomonas fluorescens CHA0. Appl Environl Microbiol 75:4162–4174. doi:10.1128/AEM.00295-09
De-Bashan LE, Bashan Y (2004) Recent advances in removing phosphorus from wastewater and its future use as fertilizer (1997–2003). Water Res 38:4222–4246. doi:10.1016/j.watres.2004.07.014
Deepa CK, Dastager SG, Pandey A (2010) Isolation and characterization of plant growth promoting bacteria from non-rhizospheric soil and their effect on cowpea (Vigna unguiculata (L.) Walp.) seedling growth. W J Microbiol Biotech 26:1233–1240. doi:10.1007/s11274-009-0293-y
Devliegher W, Syamsul MA, Verstraete W (1995) Survival and plant growth promotion of detergent-adapted Pseudomonas fluorescens ANP15 and Pseudomonas aeruginosa 7NSK2. App Envriron Microbiol 61:3865–3871
Dubuis C, Rolli J, Lutz M, Défago G, Haas D (2006) Thiamine-auxotrophic mutants of Pseudomonas fluorescens CHA0 are defective in cell-cell signaling and biocontrol factor expression. Appl Environ Microbiol 72:2606–2613. doi:10.1128/AEM.72.4.2606-2613.2006
Egan SV, Yeoh HH, Bradbury JH (1998) Simple picrate paper kit for determination of the cyanogenic potential of cassave flour. J Sci Food Agric 76:39–48
Ferreras L, Magra G, Besson P, Kovalevski E, García F (2007) Indicadores de calidad física en suelos de la región pampeana norte de Argentina bajo siembra directa. Cienc Suelo 25:159–172
Gould WD, Hagedorn C, Bardinelli TR, Zablotowicz RM (1985) New selective media for enumeration and recovery of fluorescent pseudomonads from various habitats. Appl Environ Microbiol 49:28–32
Gyaneshwar P, Naresh KG, Parekh LJ (1998) Effect of buffering on the phosphate-solubilizing ability of microorganisms. W J Microbiol Biotech 14:669–673
Gyaneshwar P, Naresh KG, Parekh LJ, Poole PS (2002) Role of soil microorganisms in improving P nutrition of plants. Plant Soil 245:83–93. doi:10.1023/A:1020663916259
Haas D, Défago G (2005) Biological control of soil-borne pathogens by fluorescent pseudomonads. Nat Rev Microbiol 3:307–319. doi:10.1038/nrmicro1129
Hayat R, Ali S, Amara U, Khalid R, Ahmed I (2010) Soil beneficial bacteria and their role in plant growth promotion: a review. Ann Microbiol 60:579–598. doi:10.1007/s13213-010-0117-1
Herisgtad B, Hamilton M, Heersink J (2001) How to optimize the drop plate method for enumerating bacteria. J Microbiol Meth 44:121–129
Jha B, Gandhi Pragash M, Cletus J, Raman G, Sakthivel N (2009) Simultaneous phosphate solubilization potential and antifungal activity of new fluorescent pseudomonad strains, Pseudomonas aeruginosa, P. plecossicida and P. mosselii. W J Microbiol Biotech 25:573–581. doi:10.1007/s11274-008-9925-x
Joseph S, Jisha MS (2009) Buffering reduces phosphate solubilizing ability of selected strains of bacteria. W J Agricul Sci 5:135–137
Kämpfer P (2007) Taxonomy of phosphate solubilizing bacteria. In: Velázquez E, Rodríguez-Barrueco C (eds) Developments in plant and soil sciences: first international meeting on microbial phosphate solubilization. Springer, Dordrecht, pp 101–106
Lugtenberg B, Kamilova F (2009) Plant-growth promoting rhizobacteria. Annu Rev Microbiol 63:541–556. doi:10.1146/annurev.micro62.081307.162918
Malboobi MA, Owla P, Behbahani M, Sarokhani E, Moradi S, Yakhchali B, Deljo A, Heravi KM (2009) Solubilization of organic and inorganic phosphates by three highly efficient soil bacterial isolates. W J Microbiol Biotech 25:1471–1477. doi:10.1007/s11274009-0037-z
Martín L, Velazquez E, Rivas R, Mates PF, Martínez-Molina E, Rodríguez-Barrueco C, Peix A (2007) Effect of inoculation with a strain of Pseudomonas fragi in the growth and phosphorus content of strawberry plants. In: Velázquez E, Rodríguez-Barrueco C (eds) Developments in plant and soil sciences: first international meeting on microbial phosphate solubilization. Springer, Dordrecht, pp 309–315
Meyer JB, Frapolli M, Keel C, Maurhofer M (2011) A novel molecular marker for studying phylogeny and diversity of phosphate-solubilizing pseudomonads: the pyrroloquinoline quinone biosynthetic gene pqqC. Appl Environ Microbiol 77:7345–7354. doi:10.1128/AEM.05434-11
Murphy J, Riley JP (1962) A modified single solution method for determination of phosphate. Anal Chim Acta 27:31–36
Nannipieri P, Giagnoni L, Landi L, Renella G (2011) Role of phosphatase enzymes in soil. In Bunemann EK et al (eds) Phosphorus in Action. Soil Biology 26. Springer Verlag, Berlin Heidelberg, pp 215-241.
Nautiyal CS (1999) An efficient microbiological growth medium for screening phosphate solubilizing microorganisms. FEMS Microbiol Lett 170:265–270. doi:10.1111/j.1574-6968.1999.tb13383.x
Oliveira CA, Alves VMC, Marriel LE, Gomes EA, Scotti MR, Carneiro NP, Guimaraes CT, Schaffert RE, Sá NMH (2009) Phosphate solubilizing microorganisms isolated from rhizosphere of maize cultivated in an oxisol of the Brazilian Cerrado Biome. Soil Biol Biochem 41:1782–1787. doi:10.1018.j.soilbio.2008.01.012
Picard C, Bosco M (2007) Genotypic and phenotypic diversity in populations of plant-probiotic Pseudomonas spp. colonizing roots. Naturwissenschaften 95:1–16. doi:10.1007/s00114-007-0286-3
Picard C, Di Cello F, Vestura M, Fani R, Guckert A (2000) Frequency and biodiversity of 2,4-diacetylphloroglucinol producing bacteria isolated from the maize rhizosphere at different stages of plant growth. Appl Environ Microbiol 66:948–955
Picone L, Capozzi I, Zamuner E, Echeverría H, Sainz Rozas H (2007) Transformaciones de fósforo en un molisol bajo sistemas de labranza contrastantes. Cienc Suelo 25:99–107
Polonenko DR, Scher FM, Kloepper JW, Singleton CA, Laliberte M, Zaleska I (1987) Effects of root colonizing bacteria on nodulation of soybean roots by Bradyrhizobium japonicum. Can J Microbiol 33:498–503. doi:10.1139/m87-083
Ramachandran K, Srinivasan V, Hamza S, Anandaraj M (2007) Phosphate solubilizing bacteria isolated from the rhizosphere soil and its growth promotion on black pepper (Piper nigrum L.) cuttings. In: Velázquez E, Rodríguez-Barrueco C (eds) Developments in plant and soil sciences: first international meeting on microbial phosphate solubilization. Springer, Dordrecht, pp 325–331
Ramette A, Frapolli M, Défago G, Moenne Y (2003) Phylogeny of HCN synthase-encoding hcnBC genes in biocontrol fluorescent Pseudomonas and its relationship with host plant species and HCN synthesis ability. Mol Plant Microbe Interact 16:525–535. doi:10.1094/MPMI.2003.16.6.508
Ramette A, Frapolli M, Fischer-LeSaux M, Gruffaz C, Meyer JM, Défago G, Sutra L, Moënne-Loccoz Y (2011) Pseudomonas protegens sp. nov., widespread plant-protecting bacteria producing the biocontrol compounds 2,4-diacetylphloroglucinol and pyoluteorin. Syst Appl Microbiol. doi:10.1016/j.syapm.2010.10.005
Ravindra NP, Raman G, Narayanan KB, Sakthivel N (2008) Assesment of genetic and functional diversity of phosphate solubilizing fluorescent pseudomonads isolated from rhizospheric soil. BMC Microbiol 8:230. doi:10.1186/1471-2180-8-230
Richardson AE (2001) Prospects for using soil microorganisms to improve the acquisition of phosphorus by plants. Aust J Plant Physiol 28:897–906. doi:10.1071/PP01093
Richardson AE, Simpson RJ (2011) Soil microorganisms mediating phosphorus availability. Plant Physiol 156:989–996. doi:10.1104/pp.111.175448
Richardson AE, Barea JM, McNeill AM, Pringet-Combaret C (2009) Acquisition of P and N in the rhizosphere and plant growth promotion by microorganisms. Plant Soil 321:305–339. doi:10.1007/s11104-009-9895-2
Rodríguez H, Fraga R (1999) Phosphate solubilizing bacteria and their role in plant growth promotion. Biotech Adv 17:319–339. doi:10.1016/s0734-9750(99)000142
Sacherer P, Défago G, Hass D (1994) Extracellular protease and phospholipase C are controlled by the global regulatory gene gacA in the biocontrol strain Pseudomonas fluorescens CHA0. FEMS Microbiol Lett 116:155–160
Selvakumar G, Joshi P, Suyal P, Mishra PK, Joshi GK, Bisht JK, Bhatt JC, Gupta HS (2011) Pseudomonas lurida M2RH3 (MTCC9245), a psychrotolerant bacterium from the Uttarakhand Himalayas, solubilizes phosphate and promotes wheat seedling growth. W J Microbiol Biotech 27:1129–1135. doi:10.1007/s11274-010-0559-4
Singh JS, Pandey VC, Singh DP (2011) Efficient soil microorganisms: a new dimension for sustainable agriculture and environmental development. Agri Ecosys Environ 140:339–353. doi:10.1016/j.agee2011.01.017
Tamura K, Dudley K, Nei M, Kumar S (2007) MEGA4: Molecular Evolutionary Genetics Analysis (MEGA) Software Version 4.0. Mol Biol Evol 24:1596–1599. doi:10.1093/molbev/msm092
Tao G, Tian S, Cai M, Xie G (2008) Phosphate solubilizing and mineralizing abilities of bacteria isolated from soils. Pedosphere 18:515–523. doi:10.1016/S1002-0160(08)60042-9
Trujillo ME, Veláquez E, Miguélez S, Jimenez MS, Mateos PF, Martínez-Molina E (2007) Characterization of a strain of Pseudomonas fluorescens that solubilizes phosphates in vitro and produces high antibiotic activity against several microorganisms. In: Velázquez E, Rodríguez-Barrueco C (eds) Developments in plant and soil sciences: first international meeting on microbial phosphate solubilization. Springer, Dordrecht, pp 265–268
Vassilev N, Vassileva M, Nicolaeva I (2006) Simultaneous P solubilizing and biocontrol activity of microorganism: potential and future trends. Appl Microbiol Biotech 71:137–144. doi:10.1007/s00253-006-0380-z
Viruel E, Lucca ME, Siñeriz F (2011) Plant growth promotion traits of phosphobacteria isolated from Puna, Argentina. Arch Microbiol 193:489–496. doi:10.1007/s00203-011-0692-y
Wall LG (2011) The BIOSPAS consortium. In: de Bruijn FJ (ed) Handbook of molecular microbial ecology I. Wiley-Blackwell, New Jersey, pp 299–306
Acknowledgements
This work was supported by grants PAE 36976-PID 52 and PME 2006-1730 (Agencia Nacional de Promoción Científica y Tecnológica, Argentina), PIP 112-494 200801-02271 (CONICET, Argentina), and PUNQ 0395/07 (Universidad Nacional de Quilmes, Argentina). We thank Ana María Zamponi (CONICET) for her technical assistance and Carolina Fernández for providing laboratory facilities to use the optical microscope. LF and BA hold a Ph.D. fellowship from CONICET. LGW and CV are members of CONICET.
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Leticia Fernández and Betina Agaras equally contributed to this paper. Rizobacter Argentina S.A. has priority access to the bacterial isolates reported here.
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Fernández, L., Agaras, B., Zalba, P. et al. Pseudomonas spp. isolates with high phosphate-mobilizing potential and root colonization properties from agricultural bulk soils under no-till management. Biol Fertil Soils 48, 763–773 (2012). https://doi.org/10.1007/s00374-012-0665-6
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DOI: https://doi.org/10.1007/s00374-012-0665-6