caa a22 4500 477109578 CHVBK 20180405111604.0 cr unu---uuuuu 170330e19960601xx s 000 0 eng 10.1007/BF00010460 doi (NATIONALLICENCE)springer-10.1007/BF00010460 Growth promotion of maize and lettuce by phosphate-solubilizing Rhizobium leguminosarum biovar. phaseoli [Elektronische Daten] [Rock Chabot, Hani Antoun, Michel Cescas] Rhizobium leguminosarum bv. phaseoli strains P31 and R1, Serratia sp. strain 22b, Pseudomonas sp. strain 24 and Rhizopus sp. strain 68 were examined for their plant growth-promoting potential on lettuce and forage maize. All these phosphate solubilizing microorganisms (PSM) were isolated from Québec soils. The plants were grown in field conditions in three sites having high to low amounts of available P. In site 1 (very fertile soil), strains R1 and 22b tended to increase the dry matter yield of lettuce shoots (p≤0.10). Lettuce inoculated with rhizobia R1 had a 6% higher P concentration (p≤0.10) than the uninoculated control. In site 2 (poorly fertile soil), the dry matter of lettuce shoots was significantly increased (p≤0.05) by inoculation with strain P31 and 24 plus 35 kg ha-1 P-superphosphate, or with strain 68 plus 70 kg ha-1 P-superphosphate. In site 3 (moderately fertile soil), the dry matter of maize shoots was significantly increased (p≤0.05) by inoculation with strain 24 plus 17.5 kg ha-1 P-superphosphate, or with strain P31 plus 35 kg ha-1 P-superphosphate. Inoculation with PSM did not affect lettuce P uptake in the less fertile soil in site 2. In site 3 with the moderately fertile soil, maize plants inoculated with strain R1 had 8% higher P concentration than the uninoculated control (p≤0.01), and 6% with strains P31 and 68 (p≤0.05). The results clearly demonstrate that rhizobia specifically selected for P solubilization function as plant growth promoting rhizobacteria with the nonlegumes lettuce and maize. The P solubilization effect seems to be the most important mechanism of plant growth promotion in moderately fertile and very fertile soils when P uptake was increased with rhizobia and other PSM. Kluwer Academic Publishers, 1996 lettuce nationallicence maize nationallicence phosphorus solubilization nationallicence plant growth promoting rhizobacteria (PGPR) nationallicence Rhizobium nationallicence Chabot Rock Recherche en Sciences de la Vie et de la Santé, Pavillon Charles-Eugène Marchand, Université Laval, GIK 7P4, Québec, Canada aut Antoun Hani Recherche en Sciences de la Vie et de la Santé, Pavillon Charles-Eugène Marchand, Université Laval, GIK 7P4, Québec, Canada aut Cescas Michel Département des Sols et de Génie Agroalimentaire, Faculté des Sciences de l'Agriculture et de l'Alimentation, Pavillon Paul-Comtois, Université Laval, GIK 7P4, Québec, Canada aut Plant and Soil Kluwer Academic Publishers; gopher://gopher:wkap.nl 184/2(1996-06-01), 311-321 0032-079X 184:2<311 1996 184 11104 https://doi.org/10.1007/BF00010460 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00010460 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chabot Rock Recherche en Sciences de la Vie et de la Santé, Pavillon Charles-Eugène Marchand, Université Laval, GIK 7P4, Québec, Canada aut NATIONALLICENCE 700 1- Antoun Hani Recherche en Sciences de la Vie et de la Santé, Pavillon Charles-Eugène Marchand, Université Laval, GIK 7P4, Québec, Canada aut NATIONALLICENCE 700 1- Cescas Michel Département des Sols et de Génie Agroalimentaire, Faculté des Sciences de l'Agriculture et de l'Alimentation, Pavillon Paul-Comtois, Université Laval, GIK 7P4, Québec, Canada aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers; gopher://gopher:wkap.nl/ 184/2(1996-06-01), 311-321 0032-079X 184:2<311 1996 184 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer