Browsing by Author "Popovici, Ana"

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CERCETĂRI PRIVIND INFLUENȚA BIOSTIMULATORULUI REGLALG ÎN COMBINAȚIE CU MICROELEMENTE ASUPRA ACTIVITĂȚII PEROXIDAZEI ȘI CATALAZEI ÎN FRUNZELE UNOR SOIURI DE PRUN
(CEP USM, 2023) Gîscă, Alina; Popovici, Ana; Șișcanu, Gheorghe
Tratamentele foliare aplicate cu biostimulatorul Reglalg în combinație cu microelementele B, Zn, Mn, Mo contribuie la sporirea activității catalazei și peroxidazei în frunzele pomilor de prun, soiurile autohtone Udlinennaia și Superprezident, soiurile de selecție străină Stanley și Prezident, introduse în Moldova pe tot parcursul perioadei de vegetație a anului 2023. O enzimă este o componentă biologică care crește viteza unei reacții chimice prin scăderea barierei energetice de activare. Catalaza și peroxidaza sunt enzime. Activitatea enzimelor peroxidaza şi catalaza s-a modificat pe parcursul perioadei de vegetaţie în dependenţă de particularităţile biologice ale soiurilor, de procesele metabolice în diferite fenofaze, de acţiunea temperaturilor ridicate cât şi de acţiunea substanţelor folosite la tratarea pomilor în perioada de vegetaţie.
Influenţa tratării pomilor de prun cu SBA Reglalg şi microelemente asupra activităţii aparatului fotosintetic, peroxidazei şi catalazei
(CEP USM, 2024-10-07) Gîscă, Alina; Popovici, Ana; Svetlicenco, Valentina
Vegetative growth and photosynthesis are the mainstaies of plant vitality, productivity and resilience. Over the course of four years, during the vegetation period, the functionality of the photosynthetic apparatus and the activity of the enzymes peroxidase, polyphenoloxidase and catalase were determined in ontogeny in the leaves of four late varieties of plum. Resulting from the average activity of the enzymes investigated in part, we obtained that it changed differently depending on the environmental conditions, high temperatures, genotype, tree treatments, as well as the differentiated role of each enzyme in the metabolic processes that took place in certain phenophases in the leaves of plum trees of the researched varieties. In all varieties, there were higher values in the version treated with SBA Reglalg and microelements Br, Zn, Mn and Mo. The President variety had higher peroxidase values, Stanley and President varieties of polyphenoloxidase, and Stanley variety of catalase.
MODIFICAREA ACTIVITĂȚII PEROXIDAZEI ȘI A CATALAZEI ÎN FRUNZELE POMILOR DE PRUN ÎN DEPENDENȚĂ DE TRATARE A POMILOR CU SBA REGLALG ȘI MICROELEMENTE
(CEP USM, 2023) Popovici, Ana; Bujoreanu, N.; Svetlicenco, Valentina; Gîscă, Alina
Scientific research was carried out in the leaves of four late varieties of plum, two of foreign origin (Stanley and Prezident) and two of local origin (Udlinenaia and Superprezident). In them was determined the activity of the enzymes peroxidase and catalase. The activity values of the investigated enzymes during the vegetation period changed depending on the metabolic processes in the leaves of the trees that took place in certain phenophases, on the environmental conditions, on the amount of oxidative substances that formed in plant cells under the action of high temperatures, the biological peculiarities of the varieties, as well as the substances used to treat plum trees. In the version of the trees treated with SBA Reglalg and microelements B, Zn, Mn, Mo, the activity of these enzymes was higher than in the control version. The mentioned substances positively influenced the activity of these enzymes during the vegetation period. With the modification of the activity of the enzymes peroxidase and catalase in ontogenesis, we mention their participation in the metabolic processes that correlate with the functions of resistance and adaptation of plants to unfavorable environmental conditions and, consequently, the formation of the harvest and the quality of the fruits.