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  • Open Access

    ARTICLE

    Selenium invoked antioxidant defense system in Azolla caroliniana plant

    Hassan AMA, EM Mostafa

    Phyton-International Journal of Experimental Botany, Vol.85, pp. 262-269, 2016, DOI:10.32604/phyton.2016.85.262

    Abstract Plants of Azolla caroliniana were treated with different selenium concentrations (0, 1, 2, 5, 7, 10 ppm) for seven days. Selenium (Se) content in Azolla plants increased significantly with increasing Se concentrations in the culture media up to 5 ppm. This indicated that Azolla plants were a good accumulator for Se. Selenium accumulation determined changes in Azolla biomass, doubling time and relative growth rates. Treatment of Azolla plants with low concentrations of Se (1 ppm) resulted in a significant increase in biomass. This was accompanied by a reduction in hydrogen peroxide and malondialdehyde (MDA) contents; the decrease percentages were 78%… More >

  • Open Access

    ARTICLE

    Phytochemical quality of tomato Saladette produced with organic substrates under greenhouse conditions

    González B ML1, M Fortis H1, P Preciado R1, MA Segura C1, E Salazar Sosa1, JL García H2, JR Esparza R3

    Phyton-International Journal of Experimental Botany, Vol.85, pp. 71-78, 2016, DOI:10.32604/phyton.2016.85.071

    Abstract The aim of the current study was to evaluate yield and phytochemical quality of tomato fruits produced using organic substrates under greenhouse conditions. The applied treatments (organic substrates) were: T1 (80% River sand + 20% Vermicompost; T2 (90% River sand + 10% Compost); T3 Steiner Solution (80% River sand + 20% Perlite); T4 (80% River sand + 5% Soil + 15% Vermicompost); T5 (85% River sand + 15% Treated manure), and T6 (80% River sand + 5% Soil + 15% Treated manure). We used a totally randomized experimental design, with four replicate treatments. Evaluated variables were: yield, relative content of… More >

  • Open Access

    ARTICLE

    Carotenoid content, antioxidant capacity and volatile compounds of the aroma during tomato ripening

    López-Vidal1 O, H Escalona-Buendía2, C Pelayo-Zaldívar2, J Cruz-Salazar1, JM Villa-Hernández1, F Rivera-Cabrera1, O Villegas-Torres3, I Alia-Tejacal3, L J Pérez-Flores1, F Díaz de León-Sánchez1

    Phyton-International Journal of Experimental Botany, Vol.83, pp. 185-192, 2014, DOI:10.32604/phyton.2014.83.185

    Abstract During ripening, tomato fruit accumulates high levels of carotenoids. These compounds, besides their function as pigments, nutrients and antioxidants, are precursors of some important volatile compounds for the development of the characteristic aroma of these fruits. In the present work, the antioxidant capacity, lycopene and β-carotene levels, and the production of aromatic substances derived from the carotenoid biosynthetic pathway were analyzed in the tomato cultivar 7705 at different ripening stages. Results showed a significant (p<0.05) increase of lycopene and β-carotene (22.1 and 2.9 fold, respectively) from the mature green to the breaker stage. Lycopene levels increased and those of β-carotene… More >

  • Open Access

    ARTICLE

    Accumulation of silver nanoparticles and its effect on the antioxidant capacity in Allium cepa L.

    Juárez-Maldonado1 A, JL Rosales-Velázquez2, H Ortega-Ortiz3, M Cabrera-De-la-Fuente1, H Ramírez1, A Benavides-Mendoza1

    Phyton-International Journal of Experimental Botany, Vol.82, pp. 91-97, 2013, DOI:10.32604/phyton.2013.82.091

    Abstract Nanotechnology is currently an important worldwide study field because it provides control on matter at a nanometric scale. In food and agricultural fields, the applications of this technology are in early stages. Onion is one of the main vegetables grown in the world. Onion is a low calorie food which contains a large amount of flavonoids. In this work, silver nitrate application in onion was evaluated. An onion crop was developed at the University Antonio Narro in Saltillo, Mexico. Two methods of silver nitrate application were used (a nutritive solution: 0, 20, 40 and 80 mg/L of AgNO3; and foliar… More >

  • Open Access

    ARTICLE

    Comparison of isozyme transformation in maize as a result of insertion of the chitinase gene

    Yan PM1, HF Zhang1, Q Wang1, XY Yan1, Y Sun2

    Phyton-International Journal of Experimental Botany, Vol.79, pp. 117-121, 2010, DOI:10.32604/phyton.2010.79.117

    Abstract Isozymes of peroxidase (POD), catalase (CAT), esterase (EST) and superoxide dismutase (SOD) were analyzed on transgenic maize (with external chitinase gene) and its parent by vertical polyacrylamide gel electrophoresis (PAGE). This study was made using shoots at the fourth leaf stage. Results showed that: POD and EST were detected in 6 bands. POD-2 and POD-3 were present at the bud and seedling stages. POD-1, POD-4, POD-5 and POD-6 were only present at the seedling stage. POD-6 expressed stronger in the transgenic maize with chitinase than in its parent. EST-2 was present only at the bud stage, and its expression in… More >

  • Open Access

    ARTICLE

    Effect of mixed salt stress on malondialdehyde, proteins and antioxidant enzymes of Leymus chinensis in three leaf colors

    Zhou C1,2, CA Busso3, YG Yang2, Z Zhang4, ZW Wang1, YF Yang5, XG Han1

    Phyton-International Journal of Experimental Botany, Vol.86, pp. 205-213, 2017, DOI:10.32604/phyton.2017.86.205

    Abstract The mixed salt stress is common in nature. Salt stress always affects plant growth. Different plant species have different adaptive capacity to salty soils. Leymus chinensis is an herbaceous plant with different leaf colors. However, little research was conducted to explore the different tolerance mechanisms to salt stress among the three different leaf colour genotypes of Leymus chinensis (grey green, transitional color, yellow green). Pot experiments for Leymus chinensis in three leaf colors were conducted under mixed salt treatments in 2010. Malondialdehyde (MDA) and protein concentrations, and the activity of various antioxidant enzymes [i.e., superoxide dismutase (SOD), catalase (CAT), ascorbate… More >

  • Open Access

    ARTICLE

    Colour, antioxidant capacity, phenolic and flavonoid content of honey from the Humid Chaco Region, Argentina

    Cabrera M1, M Perez2, L Gallez3,4, A Andrada3, G Balbarrey3

    Phyton-International Journal of Experimental Botany, Vol.86, pp. 124-130, 2017, DOI:10.32604/phyton.2017.86.124

    Abstract Our objective was to correlate colour with total phenolic compounds, total flavonoids and antioxidant capacity of honey from the Humid Chaco region. With this purpose, 19 representative samples were selected from the 2009-2012 year period. Pollen analysis showed a predominance of native species of different landscapes such as forests and wetlands. Of the total number of samples, eleven were mixed or multifloral and eight samples were dominated by different native nectariferous woody species. The colour of honey, according to the Pfund scale, ranged from extra light amber to dark amber. Total phenolic content ranged from 40.18 to 118.82 mg GAE/100… More >

  • Open Access

    ARTICLE

    Changes in the redox status of the brain in an experimental glaucoma model

    Claudia G. REIDES1,2, Romina M. LASAGNI VITAR1,2, Agustina PEVERINI1, Natasha S. JANEZIC1, Ailen G. HVOZDA ARANA1, Sandra M. FERREIRA1,2, Susana F. LLESUY1,2*

    BIOCELL, Vol.40, No.1, pp. 51-54, 2016, DOI:10.32604/biocell.2016.40.051

    Abstract The purpose of this study was to evaluate the redox status changes of primary visual targets in the rat brain of a high pressure-induced glaucoma model. The animal model consisted of inducing ocular hypertension by cauterizing two episcleral veins on the left eye. The markers of oxidative damage and the oxidative balance evaluated in the brain seven days postoperative were: nitrites concentration, levels of non-enzymatic antioxidants and antioxidant enzymes activity.
    The increase in the nitrite content, which could be the result of the enhancement in the production of nitrogen species, and in the activity of NADPH oxidase in the glaucoma… More >

  • Open Access

    ARTICLE

    Potential antioxidant and toxicological activity of the essential oil of Rhaphiodon echinus (Nees & Mart) Schauer (Lamiaceae): morphoanatomy and polyphenolic composition of its extracts

    Rodrigues Costa A1,2, PS Pereira3, MK Alves de Sousa1,2, FC Rodrigues5, VR Duarte Mendes1, KR Rodrigues Lima1, L Marivando Barros1,4, CM Rocha Sousa1, MS Alcântara1, AB Leite Cavalcante4, R Cruz Macedo5, JP Kamdem3, AE Duarte1,2

    Phyton-International Journal of Experimental Botany, Vol.87, pp. 79-86, 2018, DOI:10.32604/phyton.2018.87.079

    Abstract The species Rhaphiodon echinus, known as betonica or creeping mint, is considered an infesting plant species, typical of the caatinga biome. Morphoanatomy is a very important tool to study the structure of plants, both its external and internal morphology, opening the knowledge about the production of secondary metabolites. These compounds are of great importance for scientific research, which may present themselves as the best antioxidants. Taking into account a lack of data in the literature on the essential oil of R. echinus, this study aimed to demonstrate its antioxidant activity and toxicity. In order to test this hypothesis, tests were… More >

  • Open Access

    ARTICLE

    Structural Characterization and Antioxidant Activity of Lignin Extracted from Ficus Carica L.

    Ibtissem Moussa1,2, Ramzi Khiari1,3,4,*, Ali Moussa2, Gérard Mortha4, Mohamed Farouk Mhenni1

    Journal of Renewable Materials, Vol.7, No.4, pp. 345-354, 2019, DOI:10.32604/jrm.2019.04011

    Abstract The most abundant phenolic biopolymer in the biosphere is the lignin. This phenolic biopolymer commonly exists in combination with polysaccharides and other cell wall components. In this study, the solvent system dioxane-water is used to extract lignin, which is considered as unaltered native lignin. The dioxane lignin extracted from fig stems was characterized regarding to its structural feature, quantification of its functional groups, molecular weight, and evaluation of its thermal properties. Purity and molecular weight distribution of the studied lignin indicated that isolated lignin contained a low amount of sugar (c.a. 19%) and had a high weight-average molecular weight (10… More >

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