Speaker
Dr
Elmira Sargsyan
(Institute of Hydroponics Problems NAS RA)
Description
In the consequence of anthropogenic influence the artificial and natural radionuclids (RN) penetrate into the environment then through ecological chain enter in biogeochemical circulation which leads to their undesirable accumulation in the living organisms. The study of artificial (90Sr, 137Cs) and natural (U) RN accumulation in hydroponic and wild plants of Thymus (T) marshallianus Willd. and Thymus serpyllum L. has particular interest, as Armenia is located in the technogenic influence zone of Armenian Nuclear Power Station (ANPS). The use of Thyme in medicine is conditioned by the existence of valuable essential oil content and biologically active substances which have range of pharmacological activities such as antimicrobial, antiviral, antioxidant, etc. The species of Thyme are included in the composition of tea, herb collections and drugs. Radiochemical analyses were carried out in hydroponic (Yerevan 30km zone) and natural (Dilijan approximately 90km zone) areas of technogenic influence of ANPS.
Results of the study illustrated, that the accumulation of artificial and natural RN by T. marshallianus and T. serpyllum was different in the same rate of radioecological stress. T. marshallianus grown in wild and hydroponic conditions exceeded T. serpyllum by β-activity -1.2 and 1.1; 90Sr -1.4 and 1.4; 137Cs -1.1 and 1.5; U - 1.4 and 1.1 times respectively. The content of the artificial RN in hydroponic and wild T. marshallianus was nearly the same, while the U content was different. Accumulation of U in T. marshallianus grown in wild conditions exceeded hydroponic one 1.2 times which is probably due to its high content in the soil compared with hydroponics. The content of U and 90Sr in T. serpyllum from both areas was the same, whereas wild plants accumulated 137Cs 1.4 times more than hydroponic plants. It was found that the content of β- radiate RN in the wild plants of both species of Thyme was 1.1 times lower as in hydroponics. However, in the total β-activity part of 90Sr (1.1 times) and 137Cs (1.4 times) in the hydroponic plants was lower compared with wild plants. It has been confirmed that the content of controlled RN in the hydroponic and wild vegetative raw material of both species of Thyme does not exceed the M.A.C..
Therefore, the elaborated hydroponic method can contribute to the creation of cultivated areas of Thyme and receive ecologically pure medicinal raw material.
The researches were implemented in the context of project 11-1F-264.
Primary author
Dr
Elmira Sargsyan
(Institute of Hydroponics Problems NAS RA)
Co-authors
Ms
Anush Vardanyan
(Institute of Hydroponics Problems NAS RA)
Dr
Laura Ghalachyan
(Institute of Hydroponics Problems NAS RA)
Ms
Sona Bulgadaryan
(Institute of Hydroponics Problems NAS RA)
