Growth and yield assessment of rice (Oryza sativa) after rhizo-inoculation with selected plant growth-promoting rhizobacteria in a ferric ultisol
February 17, 2020
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| Article Title: | Growth and yield assessment of rice (Oryza sativa) after rhizo-inoculation with selected plant growth-promoting rhizobacteria in a ferric ultisol |
| Authors: | Ikhajiagbe B., Ohanmu E. O. |
| Affiliation: | Environmental Biotechnology and Sustainability Research Group, Department of Plant Biology and Biotechnology, University of Benin, Nigeria Applied Environmental Bioscience and Public Health Research Group, Department of Plant Biology and Biotechnology, University of Benin, Nigeria Department of Plant Biology and Biotechnology, Faculty of Science, Edo University Iyamho, Edo State, Nigeria |
| Abstract: | The present study investigated the growth and yield responses of rice (Oryza sativa) after rhizo-inoculation with selected plant growth promoting rhizobacteria, PGPRs, (Bacillus subtillis, Micrococcus varians and Pseudomonas aeruginosa) in an ultisol. Viable rice (NERICA) seeds were acquired and sown in a nursery. When rice seedlings had attained the 3-leaf stage, they were removed from the nursery to be transplanted unto experimental bowls after immersing their roots in microbial culture of the PGPRs for 25 mins in a 50ml beaker (dilution factor = 10-3). Results showed no effects on chlorophyll contents. Overall plant survival was also not affected (p>0.05) by PGPR-inoculation (88.32 – 98.32%). Significant improvement in rice yield was reported in the stands inoculated with P. aeruginosa. There were 49 seeds per plant compared to 25 in the control. Per plant yield was 0.53g in P. aeruginosa-inoculated rice stands compared to 0.28g obtained in the control (p<0.05). The yield of stands inoculated with B. subtillis and M. varians were comparable with the control. There was significant (p<0.05) reduction in leaf loss as well as leaf drying compared to control plants, thus indicating the importance of PGPR in plant development under influence of environmental stress conditions. |
| Keywords: | Bacillus, PGPR, Pseudomonas, ultisol, upland rice |
| *Correspondence: | Edokpolor Osazee Ohanmu, Edo University Iyamho, Faculty of Science, Department of Plant Biology and Biotechnology, Km 7 Auchi-Abuja Expressway, Iyamho-Uzairue, Auchi, Edo State, Nigeria, Tel. (+234) 8135897349, email: edos.ricky@yahoo.com |
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