The influence of UV-radiation on the 14 CO 2 assimilation rate of three high mountainous plants (Heracleum lehmannianum Bunge, Prangos pabularia Lind L. and Lathyrus mulkak Lipsky) with different photosynthetic intensity and directivity of photosynthetic carbon metabolism was studied. The investigation was carried out in the Biological Station of The Institute of Plant Physiology and Genetics (Academy of Sciences of Republic of Tajikistan), located on an austral decline (2350 m above sea level) of the Hissar valley (Tajikistan). It is proved, that plants show different responses to dissecting away of UV-rays. Almost tenfold fall in the intensity of 14 CO 2 fixation (during 30 sec) is noted for H. lehmannianum; in P. pabularia there was twofold fall in depression, and in L. mulkak the dissecting away of UV-rays resulted in the minor rising of the photosynthetic rate. Under both film dropping UVrays and in open area, we have not revealed essential differences in the 14 CO 2 assimilation rate in all three plants.The experiments were carried out in three variants:2. The plants were covered with polyethylene film.3. The plants were covered with polyethylene film enriched with 2-oxi-4-alcoxibenzophenol (0.65%), cutting off the UV part of solar spectrum.The study of 14 C incorporation into the products of photosynthesis has manifested essential differences between investigated plants. From the control experiment, using the Heracleum leaves, more than 65% of a label was included into the intermediates of the Calvin cycle (among them about 20% into PGA). The dissecting away of UV-radiation resulted in a depression of 14 C incorporation into PGA and PES. The key products, which, at 30 sec exposure, concentrated the most part of label were sugars, predominantly sucrose. Intermediates of the glycolic pathway concentrated a small part of 14 C (22%). The depressing of CO 2 photosynthetic assimilation in Prangos was accompanied by a sharp slump of 14 C incorporation into intermediates of the Calvin cycle. The label was found out in sugars predominantly and in intermediates of the glycolic pathway. In control plants we detected an increase of 14 C lobe in monosaccharides. The content of label in intermediates of glycolic pathway decreased. In Lathyrus leaves under investigation we revealed intensive label incorporation into intermediates of the Calvin cycle and its decrease in the metabolites of the glycolic pathway. We found minor quantities of 14 C contents in sugars and PEP-products. It is supposed that the UV-rays influence the activity of RUBISCO and other enzymes of the Calvin cycle. The mechanisms of UV-rays influence on carboxylation system and the possibility of their regulatory role in high mountainous plants are under discussion.

Influence of sodium chloride on seed germination and seedling growth of wheat (triticum durum desf.

Modern scientific approaches give clinicians an advantage in using additional tools and methods for assisting in clinical assessment and expanding their capabilities for classifying patients according to risk factors for cardiovascular complications. Biomarkers are a simple tool that allows to identify and classify people with different risk degree, quickly and accurately diagnose the condition of the disease, effectively predict and control treatment. Therefore, the identification and study of biomarkers is a serious and promising approach to understanding and treating cardiovascular diseases (CVD). Among a wide range of biomarkers, the genetic and metabolic markers is of high importance. Cardio-metabolomics is a new direction in cardiovascular science that allows researchers to study changes in metabolome and metabolic networks in diseases of the cardiovascular system in order to better understand their pathophysiological mechanism. Thus, the study of metabolome can provide important information about the pathogenesis of CVDs, as well as offer the possibility of identifying new CVD biomarkers.

No abstract

No abstract