PHYTOCHEMICAL CONTENT AND ANTIOXIDANT ACTIVITY OF TWO CULTIVARS OF WHITE CABBAGE

The purposeof this study was to evaluate comparatively the phytochemical content, the antioxidant enzymes activities and the antioxidant activity in two cultivars of white cabbage (Brassica oleracea var. capitata f. alba). The content of reducing sugar, ascorbic acid, total phenolic, flavonoids, catalase and peroxidase activity were determined by colorimetric methods. The antioxidant activity was evaluated by DPPH and ABTS radical scavenging assay. The results show that studied chemical indices vary depending on the analyzed cultivar. This study recommends introducing the investigated varieties in diet due to the rich content of compounds with antioxidant properties

THE INFLUENCE OF THE HYBRID ON EARLY TOMATOES PRODUCTION

In greenhouses solarium type for early productions are used tomato hybrids with semi-determined growth (5 floors fructification) or undeterminated growth, but the plants are stagnated in growth after 4-5 fructifications floors. In this regard, it was studied the behavior of some tomato hybrids for early crop in solarium, in Izbiceni vegetable basin, in southern Romania. The tomato hybrids were: Gravitet F1,MagnusF1, ParisF1, PrekosF1. In the experience they have made observations about the way of growth of plants, the productive potential of hybrids and biochemical analyzes were performed on the fruits (total soluble dry, total soluble solids, titratable acidity and vitamin C content). From the point of view of growth, all hybrids had semi-determined growth after 5 floors of fructification occurs growth stagnation. The best yields were registered at Magnus F1 and Gravitet F1 hybrids and Prekos F1 and Paris F1 hybrids recorded lower productions, but in optimum temperatures conditions at limit, had a good early fructification they compensated by sales to advantageous prices

The Morphophysiological, Histological, and Biochemical Response of Some Nontarget Organisms to the Stress Induced by the Pesticides in the Environment

Ferns, amphibians, and fish are groups of nontarget organisms affected by many types of pesticides that end up in the environment. This chapter aims to approach the following themes: the influence of different pesticides on the spore germination process and on the differentiation of their gametophyte; aspects regarding the impact of some pesticides on breathing in fish (physiology and histopathology at the branchial level), as well as a series of effects at the hematological and biochemical levels; and changes of some hematological, biochemical, and structural parameters in amphibians. Species that are not directly targeted by the action of the pesticide in the environment, ferns can be used in their gametophyte stage, young or mature sporophyte in different biotests to evaluate the risk associated with these substances. The biochemical, hemathological, and histopathological changes recorded in both fish and amphibians can be considered biomarkers of pesticide pollution

Synthesis and electrochemical characterization of substituted indolizine carboxylates

This work is devoted to the synthesis and characterization of new indolizine derivatives. Particular attention was paid to the electrochemical investigations by cyclic voltammetry and differential pulse voltammetry. The redox processes for each compound were established, analyzed and assessed to the particular functional groups at which they take place. This assessment was based on detailed comparison between the electrochemical behaviour of the compounds, similarities in their structure, as well as substituent effects

INFLUENCE OF LATE BLIGHT (PHYTOPHTHORA INFESTANS) ATTACK ON NUTRITIONAL QUALITY OF TOMATO

The effect of natural infection with Late Blight (Phytophthora infestrans) on chemical fruit quality on six tomato (Lycopersicon esculentum) varieties (Menhir F1, Lady Rosa F1, Kilates F1, Anthalia F1, Prekos F1, Vanessa F1) was investigated in a field trial. Plants were exposed to stress produced by natural infection with P.infestans and biochemical quality parameters were analyzed as well as antioxidant activities for both treated and untreated variants. P.infestans attack on tomato was associated with lower total soluble solids and sugar content and an increased acidity. There was no significant correlation between lycopen content and pathogen attack. Antioxidant activity reflected by PPH radical scavenging activity and ABTS radical cation scavenging activity increased in case of pathogen`s attack

Valoarea nutraceutică și producția de cartof dulce (Ipomoea batatas L.) cultivat în sud-vestul României

In Romania, the sweet potato is recently cultivated, especially in the South-West region. This region has a temperate continental climate that is characterized by the lack of water in the soil and atmosphere and by a diversity of soil types, very important factors for the cultivation of this species. The lack of information about the real effects of the environmental factors on the nutritional quality and the production of sweet potatoes grown in this area led to this study. Therefore, the present paper aims to evaluate the nutraceutical content of 5 sweet potato genotypes, such as: TSS (total soluble substance), total carotene, reducing sugars, vitamin C, phenolic compounds, flavonoid content and antioxidant activity (determined by DPPH and ABTS) grown in the specific climatic conditions of this region. There was found a differentiated nutritional quality depending on the genotype, so that genotype 5 was rich in carotene (59.29 μg/g FW) and vitamin C (36.56 mg/100 g FW). The data presented in this study also refer to the total number of roots/plant, the average weight/root, the total production/ha, the biomass production/ha and the production index. Regarding these elements, genotype 3 recorded a biomass production of 39.5 t/ha and a total tuber production of 50.3 t/ha. The results presented in this study indicate that the production of this species is climate dependent, which influences important metabolites in tubercles, that plays an essential role in organoleptic properties.În România, cartoful dulce este introdus recent în cultură, în special în regiunea de Sud-Vest. Această regiune are un climat temperat continental care se caracterizează prin lipsa apei din sol și atmosferă și printr-o diversitate a tipurilor de sol, factori foarte importanți pentru cultura acestei specii. Lipsa informațiilor despre efectele reale ale factorilor de mediu asupra calității nutriționale și a producției la cartoful dulce cultivat în această zonă a condus la realizarea acestui studiu. Prin urmare, lucrarea de față își propune să evalueze conținutul nutraceutic din 5 genotipuri de batat, cum ar fi: SUT (substanța uscata totală), carotenele totale, zaharurile reducătoare, vitamina C, compuși fenolici, conținutul în flavonoide și activitate antioxidantă (determinată prin DPPH și ABTS), cultivați în condițiile climatice specifice acestei regiuni. S-a constatat o calitate nutrițională diferențiată în funcție de genotip, astfel, că genotipul 5 a înregistrat un conținut bogat în caroten (59,29 μg/g FW) și cel mai mare conținut de vitamina C (36,56 mg/100 g FW). Datele prezentate în acest studiu fac referire și la numărul total de rădăcini/plantă, greutatea medie/rădăcină, producția totală/ha, producția de biomasă/ ha și indicele de producție. În ceea ce privește aceste elemente, genotipul 3 a înregistrat o producție de biomasă de 39,5 t/ha și o producție totală de tuberculi de 50,3 t/ha. Rezultatele prezentate în acest studiu indică faptul că producția de cartof dulce este dependentă de climă. Aceasta, influențează metaboliți importanți din tuberculi, jucând un rol esențial în proprietățile organoleptice ale specie

INFLUENCE OF COLCHICINE TREATMENTS ON THE MORPHOLOGICAL CHARACTERS OF THE OKRA SEEDLINGS

The effect of the treatments with colchicine determines the doubling of the number of chromosomes, but can also induce mutations being often used in breeding works to induce variability. Abelmoschus esculentus (L.) Moench (syn. Hibiscus esculentus L.) is an economically important vegetable plant grown in tropical, sub-tropical and temperate areas with a warmer climate for multiple nutritional and medicinal properties. In the present paper, 0.1% colchicine treatments were performed on the okra seeds. Five variants with different exposure times were experimented and observations were made after seven days on the length and thickness of the roots and the hypocotyl. The treatment with colchicine induced the modification of the morphological characters, resulting in seedlings with short and thickened roots and hypocotyls. The maximum effect was recorded in variant no. 5 with 2 hours exposure

RESEARCHES REGARDING THE BEHAVIOR OF SOME LETTUCE GENOTYPES IN THE PROTECTIVE CROP SYSTEM TECHNOLOGY

The existence of a growing assortment of garden lettuce, constantly renewing,required to carry out research in order to determine the most valuable crops in protected areas of Oltenia. The aim of this experiment was to investigate the quality and quantity of the lettuce in greenhousesby applying some important techological sequences. Mulching the soil and plant protection with Agryl canvas have greatly improved the thermal and hydric soil proprieties with beneficial effects on earliness and yields of the lettuce grown in greenhouse. The biological material was represented by six genotypes of lettuce: Larisa, Sommer Kragner, Gratia, Attraction, Nadege and Május Királya. From the experimentalresults on the behavior of growing lettuce in protected crop conditions, the highest yield was recorded at the Kragner Sommer, genotype, 40.5t/ ha, and from the biochemical aspect, the genotypes showed optimum values, but concerning the nitrates concentration, the values were higher on Gratia and Elsa cultivars

RESEARCH CONCERNING THE EFFECT OF SUPPLMENTARY PROTECTION WITH DIFFERENT TYPES OF MATERIALS IN GREENHOUSES TO RADISH CROP

To obtain early production of vegetables, with a view to marketing at profitable prices, in practice, it recourse to different methods to improve the cultivation technologies in protected spaces. One of additional possibilities is the supplementary protection of the cultures with the different materials, against low temperatures to save energy from conventional sources.From vegetable species that are suitable for this crop system, there are also radishes, that have minimum germination temperature of 3-40C, and the optimum of 12-140C, and the growing season is short, only 28-50 days.At the Banu Maracine Research Station it was studied an experimental model regarding the use of material culture frost protection, to radish crop, against the frost ensuring optimal micro-climate, without using high energy heat consumption.Radishes crop was established in the third decade of February, in the solar. The biological material was represented by Sora cultivar and were studied the next variants: V1-control experience without protection V2-protection with manure, half fermented and well cut, V3 - protection with perforated polyethylene V4-protection with Agril microporous foil type (50gr/m2) V5-protected with microsporous foil Agril type (17gr/m2).From the experimental results it is found that in terms of production efficiency and precocity, the weakest was variant V1 and the highest efficiency was found to variant V5