Cytogenotoxic and Molecular Assessment of Pyrethrins on Non-Target Allium cepa Roots

Area of Science:

• Environmental toxicology
• Plant science
• Genetics

Background:

• Pyrethrins are natural insecticides from chrysanthemum flowers, widely used in pest management.
• They are generally considered safe due to low mammalian toxicity.
• This study investigates potential genotoxic and apoptotic effects in non-target plant species.

Purpose of the Study:

• To evaluate the cytogenotoxic and apoptotic effects of pyrethrins in Allium cepa root meristem cells.
• To assess DNA damage and genomic instability induced by pyrethrins.
• To determine the dose- and time-dependent responses to pyrethrins exposure.

Main Methods:

• Root growth inhibition assays.
• Allium ana-telophase chromosome aberration analysis.
• Comet assay for DNA damage.
• Flow cytometry for apoptosis detection.
• Random Amplified Polymorphic DNA-PCR (RAPD-PCR) for genomic instability.

Main Results:

• Pyrethrins significantly inhibited root elongation in a dose-dependent manner.
• Increased chromosomal aberrations, micronuclei, and c-metaphase were observed.
• DNA damage and apoptotic cell populations increased with pyrethrins concentration and exposure time.
• RAPD-PCR indicated genomic instability and DNA polymorphism, suggesting genotoxic effects.

Conclusions:

• Pyrethrins induce significant cytogenotoxic and apoptotic effects in Allium cepa root cells.
• The study demonstrates potential genotoxic risks to non-target plants.
• Further field and ecotoxicological studies are required to assess environmental relevance.