Bacterial Endophytes from Hibiscus sabdariffa Roots: A Source of Growth-Promoting Abilities Candidates. | ||
| Aswan University Journal of Sciences and Technology | ||
| Articles in Press, Accepted Manuscript, Available Online from 10 September 2025 PDF (1.77 M) | ||
| Document Type: Original papers | ||
| DOI: 10.21608/aujst.2025.398967.1192 | ||
| Authors | ||
| Zohor Ahmed Ibrahim* 1; Wagdi Saber Soliman2; Osama Ahmed konswoa3; Mohammed Tawfik Abbas4 | ||
| 1Department of microbiology, Faculty of agriculture and natural resources, Aswan university, Aswan, Egypt | ||
| 2Horticulture Department, Faculty of Agriculture and Natural Resources, Aswan University | ||
| 3Department of Biochemistry, Faculty of Agriculture, Cairo University. | ||
| 4Agricultural Microbiology, Faculty of Agriculture and Natural Resources, Aswan University, Aswan, Egypt | ||
| Abstract | ||
| This study aimed to isolate and characterize native strains from the endophytic rhizospheric of (Hibiscus sabdariffa L.) plants to evaluate their potential as plant growth-promoting rhizobacteria(PGPRs). A total of 32 bacterial isolates were obtained and subjected to various biochemical tests, as well as assessments of plant growth-promoting traits such as phosphate and potassium solubilization, indole acetic production, nitrogen fixation assay and evaluating its capacity to endure varying temperatures as a measure of stress. The results showed that the inner shell of roselle plants roots in Aswan hosts a diverse group of microbes, as HER18Disolates were able to produce the highest value of indole among 32 isolates, reaching (38.87 mgl-1), while isolate HER9D excelled in nitrogen fixation, reaching (43.87mgl-1).HER35D and HER13D were the highest in the (SI), (PSI) and (KSI), respectively (2.54 and 3.63 cm)-1. It is interesting to note that most of the isolates excelled in tolerating high temperatures such as HER9D, HER20D, HER37D and HER25D. Some isolates also excelled in combining multiple functions of growth-promoting traits and stress resistance, such as HER18D.Based on PGP traits, different isolates were identified that are considered potent and can be used and applied as PGPRs for different plants and improving organic agriculture to achieve a sustainable environment. | ||
| Keywords | ||
| Endophytic; Rhizobacteria; PGPRs; Heat tolerance; Medicinal plants microbiome | ||
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