PJB-2026-62
EFFECTS OF MERCURIC CHLORIDE (HgCl2) ON STEM OF MINT (Mentha spicata L.) IN SAND CULTURE
Ahmet Oğuzhan ARICA
Abstract
In this study, the effects of mercury (II) chloride (HgCl2) at concentrations of 0.5, 1, 1.5, 2, 2.5 and 3 mg/L on stem length, stem area, number of branches and leaves, stem fresh and dry weight, mercury accumulation in the stems and various anatomical parameters of the stem in mint (Mentha spicata L.) plant were investigated. The sand culture experiment was conducted in a randomized block design with five replicates and lasted for 60 days. It was observed that plant growth was significantly inhibited, especially at 2.5 and 3 mg/L mercury concentrations. Mercury accumulation in the stems increased with the increasing mercury concentration. It was determined that the negative effect increased with the increasing mercury concentration in all studied parameters, which comprised stem length, stem area, number of branches and leaves, stem fresh and dry weight, mercury accumulation in the stems, stem cortex + epidermis area, stem phloem + cambium area, stem pith region area, and stem xylem area.
The objective of this study was to investigate the effects of different concentrations of HgCl₂ on stem growth, mercury accumulation, and stem anatomical characteristics of Mentha spicata L. in sand culture. This investigation aimed to demonstrate that mercury toxicity, previously documented in root systems, also induces significant negative effects on stem growth and measurable anatomical parameters across different stem tissues in mint, an economically and medicinally important aromatic plant.
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