A Faculty Member from the Department of Biology Publishes a Global Study.
Asst. Prof. Dr. Sarab Fadel published a scientific study titled: “Biocontrol Potential of Turmeric (Curcuma longa) Extract and Pseudomonas fluorescens Against Erwinia carotovora, the Causal Agent of Soft Rot of Potato.”
In an international journal: International Journal of Medical Science and Dental Health
The study aimed to test the antibacterial effects of turmeric (Curcuma longa) extract and Pseudomonas fluorescens, used separately and in combination, against E. carotovora, the causative agent of soft rot of potato. It also aimed to determine their effectiveness when used as integrated biocontrol agents.
The study involved preparing potato tubers treated with turmeric extract, Pseudomonas fluorescens, and their combination, and then inoculating them with E. carotovora. The antibacterial activity of turmeric extract was evaluated using standard in vitro methods, while the antibacterial capacity against Pseudomonas fluorescens was determined using a dual-culture test and a tuber test. Disease severity, lesion size, and mold reduction were measured. Data were statistically analyzed to compare treatments using analysis of variance (ANOVA).
The study found that when turmeric extract and P. fluorescens were applied separately, they significantly inhibited the growth of E. carotovora, exhibiting direct antibacterial and antifungal effects, respectively. Combined application also proved more effective, achieving greater reductions in disease incidence and lesion size compared to individual applications. The phytochemicals present in turmeric facilitated a synergistic interaction, with the former exerting direct bactericidal activity, while the latter not only exerted antibacterial activity but also stimulated host defense responses.
