Investigation of the effects of cadmium by micro analytical methods onLycopersicon esculentumMill. roots

Abstract

the interactions between cadmium stress and plant nutritional elements have been investigated on complete plant or at the level of organs. this study was undertaken to contribute to the exploration of the physiological basis of cadmium phytotoxicity. We examined the changes in the nutritional element compositions of the root epidermal cells of the seedlings of Lycopersicon esculentum mill. at the initial growth stages that is known as the most sensitive stage to the stress. effects of cadmium stress on the seedlings of Lycopersicon esculentum mill. were examined by edX (energy dispersive X-ray microanalysis) assay performed with using low vacuum (~ 24 Pascal) scanning electron microscopy. In the analysis performed at the level of root epidermal cells, some of the macro-and micronutrient contents of the cells (carbon, oxygen, nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron, copper, and zinc levels) were found to change when the applying toxic concentrations of cadmium. there was no change in the manganese and sodium content of the epidermal cells. It was concluded that the changes in nutritional element composition of the cells can be considered as an effective parameter in explaining the physiological mechanisms of cadmium-induced growth inhibition.

Heavy Metal Levels and Mineral Nutrient Status of Goji Berry (Lycium barbarum L.) from Nigde, Turkey

“…Among these elements, Al is considered to be one of the main factors limiting product yield, but the molecular and biochemical basis of its toxicity is not well-known [23]. Although Ca is found higher than average values in the soil in line with the relevant literature, its concentrations were found to be within acceptable ranges in the stem (82.06 mg/kg) and the leaves (236.25) of the plants.…”