Institutul de Genetică, Fiziologie şi Protecţie a Plantelor

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

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    Funcționalitatea gametofitului mascul la descendenții plantelor de tomate reinfectate cu virusuri
    (CEP USM, 2024) Saltanovici, Tatiana; Andronic, Larisa; Antoci, Ludmila
    The article discusses the functionality of the male gametophyte in tomato offspring obtained from plants reinfected with Tobacco Mosaic Virus and Tomato Aspermy Virus. It was established that the plants from experimental variants showed specific responses associated with the change of the male gametophyte activity, that allows to the identification of resistant genotypes based on the established variability. According to the results of the ANOVA test, the variability of the pollen viability was primarily influenced by the genotype, which is important for the elucidation of the genetic basis of the reinfected genotypes and their descendants, as well as for breeding works. Genotypes that showed a high level of functionality of the male gametophyte under optimal and stressful conditions were highlighted, which allows their use in further research.
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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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    EFECTELE TEMPERATURII RIDICATE LA DIFERITE ETAPE ONTOGENETICE ASUPRA UNOR INDICI FENOTIPICI LA PLANTELE DE TOMATE
    (CEP USM, 2024) Mărîi, Liliana; Andronic, Larisa; Sahanovschih, Marionela; Ionaşcu-Urechii, Angela
    The study aims to investigate the tomato plants response to heat stress applied at the germination and seedling stages, evaluating certain phenotypic parameters in order to highlight possible particularities associated with adaptability to unfavorable environmental conditions. The research included three tomato genotypes with determined stress reactions that were designed into four variants: optimal-optimal, optimal-stress, stress-optimal, and stress-stress. The application of high temperatures at the germination stage significantly affects the subsequent development of tomato plants, resulting in a decrease in the average values of morphological traits compared to optimal conditions variants. The effects of heat stress vary depending on the genotype and the analyzed trait, with certain variants exhibiting specific vulnerabilities. Variance analysis shows that the temperature conditions and the stress application scheme significantly contribute to the variability of morphological traits, with stress at the germination stage having a dominant impact on architectural traits of plants, while genotype becomes the major influencing factor at the seedling stage. The results emphasize the importance of plant adaptability to thermal stress at different developmental stages.
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    IMPACTUL INFECȚIILOR VIRALE ASUPRA ACTIVITĂȚII GAMETOFITULUI MASCULIN DE TOMATE
    (CEP USM, 2023) Saltanovici, Tatiana; Andronic, Larisa; Antoci, Ludmila; Buldumac, Ana
    Reinfection of tomato genotypes with tobacco mosaic virus or tomato aspermia virus results in a change of plant pollen productivity and male gametophyte activity. Under the influence of infection, the specificity of the genotype response for a number of functional traits of the male gametophyte was revealed. Under conditions of primary infection and reinfection, the genotype was a determining factor in the variability of pollen viability, while the change in the size of pollen tubes was mainly determined by the appearance of viruses. As a result of the experiments, two varieties Venets and Rufina were selected for further research, combining a high level of pollen viability and productivity. They testify to a high reproductive capacity of varieties; the combination of these indicators can be used as a tool for the selection of valuable genotypes.