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- Title
Plant Growth-Promoting Bacterium from Non-Agricultural Soil Improves Okra Plant Growth.
- Authors
AlAli, Heba Adel; Khalifa, Ashraf; Almalki, Mohammed
- Abstract
Beneficial soil microorganisms influence nutrient recycling, soil fertility, plant growth, and productivity and reduce chemical fertilizer application. This study aimed to isolate bacteria from non-agricultural soils in the Al-Ahsa region and characterize the bacteria with the best biostimulating characteristics at the physiological, biochemical, and molecular level. DPM17, a bacterial isolate, promotes plant growth through phosphate solubilization, nitrogen fixation, and ammonia production. DPM17 also produces the phytohormones, indole acetic acid (IAA; 4.516 μg mL−1) and gibberellin (1.33 µg mL−1), and ammonia (0.06 µg mL−1). Additionally, DPM17 grows in the presence of up to 10% NaCl, indicating its halophilic nature. DPM17 was identified as Bacillus baekryungensis based on comparative sequence analysis of the 16S rRNA gene, and neighbor-joining phylogenetic analyses indicated that DPM17 was 96.51% identified to Bacillus sp. DPM17 inoculation substantially improved Abelmoschus esculentus (okra) root length, lateral root count, and dry weight from 7.03 to 9.41 (p = 0.03), 3.2 to 7.2, and 6 to 13 mg (p = 0.032), respectively. The results suggest that DPM17 enhances plant growth and can be exploited to develop efficient formulations for sustainable agriculture and food security in Saudi Arabia.
- Subjects
SAUDI Arabia; PLANT growth; OKRA; INDOLEACETIC acid; SUSTAINABLE agriculture; FERTILIZERS; NITROGEN fixation; BIOFERTILIZERS; FERTILIZER application
- Publication
Agriculture; Basel, 2022, Vol 12, Issue 6, pN.PAG
- ISSN
2077-0472
- Publication type
Article
- DOI
10.3390/agriculture12060873