Summary
This laboratory study isolated and characterised 156 bacterial strains from soil, desert, and marine environments, screening them for plant growth-promoting properties relevant to seed biopriming. Of the isolates tested, 68.6% solubilized phosphorus, 58.3% solubilized potassium, and 66.7% solubilized zinc. Five shortlisted isolates demonstrated efficacy in improving carrot seed germination, with the results suggesting auxin production as a principal mechanism driving the germination response.
Regional applicability
The study used laboratory methods universally applicable to seed treatment development; however, no specific field trials or United Kingdom crop conditions were evaluated. The findings would require field validation under UK climate and soil conditions to assess practical utility for UK horticulture, particularly for carrot and other vegetable seed production.
Key measures
Phosphorus, potassium, and zinc solubilization capacity; indole acetic acid (IAA) synthesis; ACC deaminase activity; ammonia production; chitinolytic activity; hydrogen cyanide (HCN) production; siderophore production; carrot seed germination percentage
Outcomes reported
The study isolated and screened 156 bacterial strains from diverse environmental sources (rhizospheric soil, desert sand, sea mud) for plant growth-promoting traits including nutrient solubilization, phytohormone production, and biocontrol activity. Five selected isolates were identified as capable of improving carrot seed germination through biopriming treatment.
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