Raisa Ivanova

Institute of Genetics, Physiology and Plant Protection Moldova State University

The tree-of-heaven plant, due to the content of secondary metabolites with a variety of unique properties, is widely studied as a potential raw material for obtaining remedies for organic farming. Our work aimed to study the allelopathic effect of Ailanthus altissima extracts on tomato (Lycopersicon esculentum) seeds. Dry plant materials of ailanth...

In this study, the changes in quality of Fagus sylvatica seeds collected in 2020 from different places of the Republic of Moldova (Plaiul Fagului, Hîrjauca) and Ukraine (Zakarpattia) on the third year of storage were evaluated. Beech seeds quality maintenance depended on the values of moisture, initial viability and seeds germination. The seeds fro...

Beech seeds are characterized by a strong exogenous and deep physiological dormancy. They need a long period of stratification, but even through stratification, seed germination is greatly extended in time. The aim of this study was to accelerate the seeds germination and improve the resistance of seedling by application of different growth regulat...

The aim of the study was to establish the changes in the germination characteristics and reserve substances mobilization of various maize seeds under the influence of supraoptimal temperature and genistifolioside. Seeds of different maize forms demonstrated different physiological responses to thermo stress and treatment with genistifolioside. The...

The pellicles, which cover the walnut kernels, protect the lipids from the kernel's endosperm against the oxidative degradation. In previous studies, we showed that for the formation of the bad brown colour and bitter taste of walnut kernels, the oxidized polyphenols (naphthoquinones) are responsible. It is necessary to mention that the ratio betwe...

The diversification of beech genotypes on the territory of the Republic of Moldova could be a so-lution to avoid the risks caused by climate change. The objective of this research was to determine the viability of beech seeds collected from four areas of the Ivano-Frankivsk region (Ukraine) and their modi-fication under the influence of various abi...

The study covered aspects of stability and colouration of Carthamin - unique red chalcone extracted from Carthamus Tinctorius L. Due to its fast degradation in aqueous solutions even at room temperatures, Carthamin has no significant use in the food industry. Therefore, obtaining Carthamin in a stable complex was of high interest. Comparing UV-Vis...

Natural dyes from pokeweed berries were stable during the 6-12 months of storage at -12°C. The decrease in the antioxidant potential of stored berries was conditioned by chemical constituents different from the betacyanin - betaxanthin complex.

The accelerated climate change due to rising temperatures creates additional difficulties in maize breeders' already complex work. Many research (Lizaso, 2017; Tivari & Yadav, 2019; Iqbal et al., 2020) focused on tolerance of maize to supra optimal temperatures as response to heat under field conditions. The results are assessed on a multi-environm...

The European beech (Fagus sylvatica L.) is one of the most important broadleaved species in European forestry, which grows in the Republic of Moldova on approximately 1,450 hectares of protected areas. Beech is propagated by seeds, but its seed formation is irregular. Therefore it is necessary to store the seeds and to obtain a high germination per...

EFFECT OF STRATIFICATION ON SEEDS GERMINATION AND SEEDLING GROWTH OF FAGUS SYLVATICA L.

Relevance. Increasing the resistance of vegetable plants to unfavorable growing conditions with the use of growth regulators that actively affect the seed quality, increase the survival rate of seedlings, stimulate the setting, formation and maturation of the crop is a significant reserve for increasing productivity with the already achieved level...

Figure 3. Seedling growth stages of Fagus sylvatica (a-hypocotyl emerging from soil; b, c, d-cotyledons left the soil) a b c d Figure 2. Determination of the germination of Fagus sylvatica seeds during stratification (a-radicle breaking through the nut wall; b-germinated seeds) a b Figure 1. Determination of the viability of Fagus sylvatica seeds d...

American pokeweed (Phytolacca americana L.) is a good ornamental plant due to its ability to grow rapidly, broad and tall vegetation, and attractive grape-like fruits. However, American pokeweed and some useful chemical constituents, which accumulate in different parts of this plant, until present, in our opinion, are not utilised sufficient effect...

American pokeweed (Phytolacca americana L.) is a good ornamental plant due to its ability to grow rapidly, broad and tall vegetation, and attractive grape-like fruits. However, american pokeweed and some useful chemical constituents, which accumulate in different parts of this plant, until present, in our opinion, are not utilised sufficient effect...

The European beech (Fagus sylvatica L.) is one of the most important broadleaved species in European forestry, which grows in the Republic of Moldova on approximately 1,450 hectares of protected areas. Beech is propagated by seeds, but its seed formation is irregular. Therefore it is necessary to store the seeds and to obtain a high germination per...

Relevance . Increasing the resistance of vegetable plants to unfavorable growing conditions with the use of growth regulators that actively affect the seed quality, increase the survival rate of seedlings, stimulate the setting, formation and maturation of the crop is a significant reserve for increasing productivity with the already achieved level...

In the summer of 2020 on the plantations of Phytolacca americana L. (pokeberry) growing in the central zone of the Republic of Moldova, a new, economically dangerous pest species was discovered, known as the southern green stink bug or southern vegetable bug-Nezara viridula L. (Heteroptera: Pentatomidae). At both stages of bug development, larvae a...

The invention relates to the food industry, namely to a process for producing dyes from Safflower petals. The process, according to the invention, comprises treating the petals with 3…5% sodium carbonate solution and subsequently pressing them, separating the solution obtained after pressing and treating it with citric acid to a pH of 4.8…6.3, foll...

Safflower (Carthamus tinctorius L.) is drought resistant plant, but the adequate irrigation is important for the increasing of safflower yield. The effects of drip irrigation associated with pre-sowing gamma irradiation of seeds on plant growth and yield were investigated. The seeds were irradiated by gamma rays (60Co) at various doses (50, 100, 15...

The purpose of investigation was to appreciate the changes in quality of walnut oil obtained by cold pressing of kernels. The kinetics of chemical reactions of oil oxidation was studied. The accumulation of the primary and secondary compounds of oxidation process depending on the storage life was analyzed. The oil quality is subjected to permanent...

The species of the genus Allium L., one of the largest genera of higher plants,occupying a significant place in the modern plant world, are of great interest bothfrom the theoretical and from the practical point of view. Plants of Allium spp.accumulate a large amount of carbohydrates, phenolic compounds (flavonoids andits glycosides, coumarins, ant...

The paper presents the results of the investigation of the species specificity of glycosides from the wild plant Linaria vulgaris Mill. on traditionally grown vegetables in Moldova – carrots, onions, eggplants, and tomatoes. Their significant stimulating impact has been noted on the germination, growth, and development of vegetables contributing to...

ABSTRACT The main objective of this study was to develop approaches for the determination of total antioxidant activity of natural products (bee bread and safflower extracts) using DPPH radical scavenging assay. Considering that analytical procedures and results related to this assay and reported by many authors are significally differed between ea...

Actinidia arguta is a perennial fruit vine, not characteristic for natural flora of Moldova. This species is of interest to gardeners due to its high ornamental value, as well as exotic fruits (hardy kiwifruits). The research of this species has been carried out at the Experimental station of the Institute of Genetics and Plant Physiology of the Ac...

Biosystems theory provides a useful framework for describing the biological role of bioactive compounds. Each functioning biosystem must adapt to and, to a certain degree, possess mechanisms or means to control both intra- and extra-Â-organism conditions, "purpose". The organism must have the capabilities to change itself or the external environmen...

The reducing activity and radical scavenging activity of hydrosoluble antioxidants in food compositions from plums during the storage were evaluated. The speeds of changing the reducing activity and radical scavenging activity were different. It was observed that the reducing activity diminished by 63.2% after 62...105 days of storage. The same mod...