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dc.contributor.authorKorir, H.
dc.contributor.authorMungai, N.W.
dc.contributor.authorThuita, M.
dc.contributor.authorHamba, Y.
dc.contributor.authorMasso, C.
dc.date.accessioned2019-12-04T11:07:42Z
dc.date.available2019-12-04T11:07:42Z
dc.date.issued2017-02-07
dc.identifier.citationKorir, H., Mungai, N.W., Thuita, M., Hamba, Y. & Masso, C. (2017). Co-inoculation effect of rhizobia and plant growth promoting rhizobacteria on common bean growth in a low phosphorus soil. Frontiers in Plant Science, 8(141), 1-10.
dc.identifier.issn1664-462X
dc.identifier.urihttps://hdl.handle.net/20.500.12478/1533
dc.descriptionOpen Access Journal
dc.description.abstractNitrogen (N) fixation through legume-Rhizobium symbiosis is important for enhancing agricultural productivity and is therefore of great economic interest. Growing evidence indicates that other soil beneficial bacteria can positively affect symbiotic performance of rhizobia. Nodule endophytic plant growth promoting rhizobacteria (PGPR) were isolated from common bean nodules from Nakuru County in Kenya and characterized 16S rDNA partial gene sequencing. The effect of co-inoculation of rhizobium and PGPR, on nodulation and growth of common bean (Phaseolus vulgaris L.) was also investigated using a low phosphorous soil under greenhouse conditions. Gram-positive nodule endophytic PGPR belonging to the genus Bacillus were successfully isolated and characterized. Two PGPR strains (Paenibacillus polymyxa and Bacillus megaterium), two rhizobia strains (IITA-PAU 987 and IITA-PAU 983) and one reference rhizobia strain (CIAT 899) were used in the co-inoculation study. Two common bean varieties were inoculated with Rhizobium strains singly or in a combination with PGPR to evaluate the effect on nodulation and growth parameters. Co-inoculation of IITA-PAU 987 C B. megaterium recorded the highest nodule weight (405.2 mg) compared to IITAPAU 987 alone (324.8 mg), while CIAT 899 C B. megaterium (401.2 mg) compared to CIAT 899 alone (337.2 mg). CIAT 899 C B. megaterium recorded a significantly higher shoot dry weight (7.23 g) compared to CIAT 899 alone (5.80 g). However, there was no significant difference between CIAT 899 C P. polymyxa and CIAT 899 alone. Combination of IITA-PAU 987 and B. megaterium led to significantly higher shoot dry weight (6.84 g) compared to IITA-PAU 987 alone (5.32g) but no significant difference was observed when co-inoculated with P. polymyxa. IITA-PAU 983 in combination with P. polymyxa led to significantly higher shoot dry weight (7.15 g) compared to IITA-PAU 983 alone (5.14 g). Plants inoculated with IITA-PAU 987 and B. megaterium received 24.0 % of their nitrogen demand from atmosphere, which showed a 31.1% increase compared to rhizobium alone. Contrast analysis confirmed the difference between the co-inoculation of rhizobia strains and PGPR compared to single rhizobia inoculation on the root dry weight. These results show that co-inoculation of PGPR and Rhizobia has a synergistic effect on bean growth. Use of PGPR may improve effectiveness of Rhizobium biofertilizers for common bean production. Testing of PGPR under field conditions will further elucidate their effectiveness on grain yields of common bean.
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.format.extent1-10
dc.language.isoen
dc.subjectPhaseolus Vulgaris
dc.subjectRhizobacteria
dc.subjectPhosphorus
dc.subjectCo-Inoculation
dc.subjectBacillus Megaterium
dc.subjectPaenibacillus Polymyxa
dc.titleCo-inoculation effect of rhizobia and plant growth promoting rhizobacteria on common bean growth in a low phosphorus soil
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.crpGrain Legumes
cg.contributor.affiliationEgerton University
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationJomo Kenyatta University of Agriculture and Technology
cg.coverage.regionAfrica
cg.coverage.regionEast Africa
cg.coverage.countryKenya
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectGrain Legumes
cg.iitasubjectSoil Fertility
cg.iitasubjectSoil Information
cg.journalFrontiers in Plant Science
cg.howpublishedFormally Published
cg.accessibilitystatusOpen Access
local.dspaceid82083
cg.targetaudienceScientists
cg.identifier.doihttps://doi.org/10.3389/fpls.2017.00141


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