2. Articole

Permanent URI for this collectionhttps://msuir.usm.md/handle/123456789/13419

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Author: search.filters.author.Andronic, LarisaSubject: search.filters.subject.drought

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    Identificarea relațiilor dintre parametrii ce contribuie la diferențierea răspunsului tomatelor la deficit hidric
    (CEP USM, 2024) Mărîi, Liliana; Andronic, Larisa; Sahanovschih, Marionela; Ionașcu-Urechii, Angela
    The study aims to analyze the conventionally associated reactions between different quantitative indices in the formation of the plant's response to drought (PEG 6000) in tomato sprouts. The results indicate a moderate positive correlation between PEG6000 concentration (0, 10, 12%) and seed germination rate in 10 genotypes. A significant decrease in seedling and radicale length (18-67%) was observed under stress conditions, with a stimulation of lateral and adventitious radicale formation. Principal Component Analysis (PCA) for 9 quantitative indicators in 5 tomato genotypes identified that the first three principal components explain 82.3% of the variability, presenting combinations of traits with diametrically opposite effects, some increasing the variance of the data field and others, on the contrary, decreasing it, thus differentiating the genotypes in the coordinate plane based on their response to optimal conditions or stress as determined by the principal components. This fact allows us to highlight the indicators that are relevant in estimating the genotype's reaction to stress.
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    PARTICULARITĂȚILE RĂSPUNSULUI GENOTIPURILOR DE TOMATE SUB ACȚIUNEA INFECȚIILOR VIRALE ȘI A DESCENDENȚILOR ACESTORA LA STRESUL ABIOTIC
    (CEP USM, 2023) Mării, Liliana; Andronic, Larisa; Smerea, Svetlana; Rudacova, Angela; Cherdivară, Ala; Rudacov, S.; Sahanovschih, Marionela
    The evaluation of some polyvalent biochemical indicators under optimal conditions and heat or drought highlighted specific aspects if these plants came from parents infected with Tobacco Mosaic Virus (TMV) or Tomato Aspermy Virus (TAV). Thus, depending on the genotype, in both infected plants and their descendants, the POX values were usually higher or lower than the control group. The origin of the plants (control, TMV, TAV) had the largest contribution in the variability of H2O2 and stress for POX, respectively 74,1 and 23,6 %, and the combinations of the factors genotype, stress and origin had a considerable impact on the H2O2 content.