Facultatea de Biologie și Geoştiinţe / Faculty of Biology and Geosciences

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Author: search.filters.author.Popescu, VictoriaSubject: search.filters.subject.lupoaie

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    IDENTIFICAREA GRADULUI DE REZISTENŢĂ LA LUPOAIE (RASA E) ÎN CADRUL UNOR GENOTIPURI DE FLOAREA-SOARELUI
    (CEP USM, 2008) Duca, Maria; Glijin, Aliona; Popescu, Victoria
    Molecular markers linked to broomrape resistance genes would permit a better understanding of genetic determinism of broomrape resistance in sunflower and f acilitate early selection by screening the presence of a few specific DNA markers. We have provided analysis of 29 sunflower lines with SCAR marker RTS05 linked to the sunflower Or5 locus conferring resistance to broomrape that belong to race E. Identification of 650 bp amplicon at 27 genotypes reveal the presence of Or5 gene, missing of this amplified product at Xenia ♀ and cytoplasmic male sterile genotype # 7 suggest the susceptibility to race E.
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    ASPECTE ALE STATUTULUI OXIDOREDUCĂTOR LA DIFERITE GENOTIPURI DE FLOAREA-SOARELUI ATACATE DE LUPOAIE
    (CEP USM, 2007) Duca, Maria; Popescu, Victoria; Lupaşcu, Victor
    Accumulation of H2O2 and the activity of catalase in different genotypes of sunflower attacked by broomrape have been analyzed in this work. The accumulation of H2O2 in normal conditions is specified by genotype, being more active in the Xenia variety. The attack by broomrape leads to the intensification of the H2O2 synthesis in the analyzed genotypes, in particular in the Valentino variety. The activity of catalase decreases in attacked plants of the Xenia and Valentino varieties at the level of leaves as a result of the accumulation of SRO. The quantity of H2O2 correlates with the quantity of enzyme, both in normal conditions and in the plants attacked by broomrape.