Browsing by Author "Teleuţă, Alexandru"

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    ASPECTE PRIVIND IMPACTUL POLUĂRII ASUPRA UNOR SPECII DE ARBORI DIN CINCI ZONE ALE mun. CHIŞINĂU
    (CEP USM, 2007) Duca, Maria; Port, Angela; Glijin, Aliona; Teleuţă, Alexandru; Casapu, Olga
    To date an unprecedented, rapid change in environmental conditionsis observed, which is likely to override the adaptive potential of plants, especially that of tree species with their long reproductive cycles. These environmental changes mainly originate from anthropogenic activities, which have caused air and soil pollution, acid precipitation, soil degradation, salinity, increasing UV-B radiation, climatechange, etc. Some of these stress factors may fluctuate signifi-cantly in intensity and duration on time scales of hours, days, seasons, or years;others may change slowly and gradually affect plant growth conditions. The aim of this review was to investigate the physiological response of three species of trees Acer platanoides L; Populus nigra and Aesculus hippocastanum L. from five sites zones with different pollution. There were analysed the following indices: dry weight and total water quantity, chlorophylls, carotenes and total proteins amount that gradually were affected. The significant variations of chlorophylls concentration demonstrate that the photosynthetic system is highly sensible to pollution factors. In conclusion, according to our assays the studied species of trees are stress tolerant to pollutants and can be used as bioindicators.
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    THE ASSESSMENT OF THE NUTRIENT CONTENT IN THE PLANTS OF THE HYBRID SORGHUM BICOLOR X SORGHUM SUDANENSE HARVESTED IN DIFFERENT DEVELOPMENT STAGES
    (2023) Ţiţei, Victor; Cîrlig, Natalia; Coşman, Valentina; Guţu, Ana; Mocanu, Natalia; Cozari, Sergiu; Teleuţă, Alexandru; Garştea, Nina; Coșman, Sergiu
    The article presents the results of the research aimed at evaluating the nutrient content in the leaves, stems and panicles of the hybrid sorghum x Sudan grass "ȘAȘM-4" plants harvested in different development stages. It has been determined that the leaves have a higher content of crude protein, crude fat, carotene, ash, calcium and phosphorus; the stems have a high content of crude cellulose, nitrogen-free extract and sugar; while the panicles are rich in starch, with high energy value. During the growing season, in all component parts, the content of dry matter increases, the concentration of proteins decreases and the content of cellulose and nitrogen-free extract essentially increases.