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Abstract
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Carbon dots are indeed small carbon nanomaterials with low toxicity, good biocompatibility, good solubility in water and widespread availability. Carbon dots are smaller than other carbon nanoparticles that can be absorbed by the roots. Then, they enter cells and nuclei and interact with DNA to affect gene expression. Considering the importance of Cultivation of oil plants, in this study, the effect of carbon nanoparticles on the growth parameters of sesame was investigated. The nanoparticles were synthesized from plant tragacanth gum hydrothermally. TEM images obtained from carbon dots showed an almost spherical shape with an average diameter of 1-1.5 nm. The XRD pattern showed a width peak at 2ꆪ of about 25.8° and 38.8°, which is related to the amorphous structure and graphite section of carbon dots. Carbon dots at concentrations of 0, 5, 10, 50 and 100 mg l-1 were added to Petri dishes containing 10 sesame seeds. Seedlings were harvested after 7 days and some growth indicators were measured. Parameters of wet weight, seedling length and root length showed significant differences between different concentrations; as the concentration of 50 mg l-1 showed the highest values. Concentration of 10 mg l-1 showed the highest amount of chlorophyll a, b and carotenoids compared to other concentrations; however, there was no significant difference between different concentrations. Considering that the growth indicators in all treatments increased compared to the control, it seems that Carbon dots will have a positive effect on sesame plant growth; however, more research is needed in the later stages of development.
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