Cytogenetic and genotoxic effects of Ipomoea cairica (L.) Sweet leaf aqueous extract on root growth of Allium cepa var. agrogarum (L.).
We examined the allelopathic potential of leaf aqueous extract of invasive plant Ipomoea cairica on growth and mitosis of roots of Allium cepa var. agrogarum (L.). Root growth was inhibited by leaf aqueous extract in dosage-dependent manner. Chromosomal aberrations (C-mitosis, chromosome bridge, chromosome stickiness and micronucleus) were observed and the mitotic index decreased with increasing concentrations of extracts. The extracts induced the accumulation of reactive oxygen species (ROS). The plant root system is most sensitive organ to environmental stresses. Results obtained provide valuable information about the allelopathy and suggested that I. cairica is potential source to develop environmentally safe bioherbicides.