1 Doctoral Research Team.« Chemistry of Natural Substances – Endemic Plants and Beneficiary Communities, Doctoral School Nature, Structure of Matter and Nuclear Metrology», University of Antsiranana, Madagascar.
2 Natural and Environmental Sciences » Program, Faculty of Sciences, University of Antsiranana, Madagascar.
* Corresponding Author; Email: patrice.ralaiarison@gmail.com
ORCID Details
Patrice Hermann RALAIARISON: https://orcid.org/0009-0008-1149-2203
GSC Biological and Pharmaceutical Sciences, 2026, 37(01), 120–129
Article DOI: 10.30574/gscbps.2026.37.1.0356
Received on 03 September 2026; revised on 10 October 2026; accepted on 12 October 2026
This study evaluated the effect of inoculation with a Bacillus sp. strain on the growth of common bean (Phaseolus vulgaris L.). Fifteen bacterial isolates were obtained from different rhizospheres in the Antsiranana region of Madagascar and characterized based on their morphological characteristics and Gram staining. The strain Bacillus sp. FM 02/1, isolated from the maize rhizosphere, was selected for inoculation assays at 20, 40, 60, and 80% inoculation rates, with a non-inoculated control. Inoculation significantly affected plant growth (F(4,105) = 7.5874; p = 0.00002). The 60% inoculation rate produced the best performance, with a mean plant height of 30.5 cm and a root length of approximately 15 cm, compared with 22 cm and 4 cm, respectively, in the control. Early appearance of flower buds and pods was also observed at the 40 and 60% inoculation rates. These results indicate that Bacillus sp. FM 02/1 has plant growth-promoting potential in common bean, with the best response observed at the 60% inoculation rate.
Bacillus sp; PGPR; Inoculation; Phaseolus vulgaris L; Plant growth; Rhizosphere
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Patrice Hermann RALAIARISON, Sergio TONISSA, Nazirah MOHAMED, Tsianis ZARALAHY, Manarivo Ulrich Anito JAO and Taratra Andrée FENORADOSOA. EFFECTS OF RHIZOSPHERIC BACILLUS SP. INOCULATION ON THE GROWTH OF COMMON BEAN (PHASEOLUS VULGARIS L.). GSC Biological and Pharmaceutical Sciences, 2026, 37(01), 120–129. Article DOI: https://doi.org/10.30574/gscbps.2026.37.1.0356.