Home / Journals / PHYTON / Vol.88, No.1, 2019
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  • Open AccessOpen Access

    REVIEW

    Active compounds of medicinal plants, mechanism for antioxidant and beneficial effects

    Orozco Montes F1, A Vázquez-Hernández2, B Fenton-Navarro1
    Phyton-International Journal of Experimental Botany, Vol.88, No.1, pp. 1-10, 2019, DOI:10.32604/phyton.2019.04525
    Abstract An increased interest in the antioxidant effects of medicinal plants has developed in recent years. Identifying antioxidant compounds present in medicinal plants and elucidating the mechanism by which they prevent oxidation have been the focus of the research community. We performed a systematic and exhaustive review aimed at analyzing the available data regarding the beneficial effects of secondary metabolites in plants. The result of this review is presented as a description of free radicals, as well as cellular and physiological oxidative stress, is provided. The origin and source of antioxidant compounds, and the cellular and molecular mechanism by which they… More >

  • Open AccessOpen Access

    ARTICLE

    First report of Phytopythium vexans causing the “Avocado sadness” in Michoacan, Mexico

    Hernández Pérez A1, E Cerna Chávez2, JC Delgado Ortiz3, M Beltrán Beache4, LM Tapia Vargas5, YM Ochoa Fuentes2
    Phyton-International Journal of Experimental Botany, Vol.88, No.1, pp. 11-13, 2019, DOI:10.32604/phyton.2019.04608
    Abstract Mexico is the main producer, consumer and exporter of avocado in the world, being Michoacan the main producer state contributing more than 80% of the national production. There are phytopathogens that decimate the production causing the death of the tree. Root samples were collected in avocado trees that showed the characteristic symptomatology of the disease known as avocado sadness, the sampling was carried out in four of the main avocado producing towns, in the state of Michoacan, Mexico. The isolation consisted in sowing root tissue in Petri dishes with V8®-PARPH culture medium, subsequently they were identified morphologically and for species… More >

  • Open AccessOpen Access

    ARTICLE

    Influences of ascorbic acid and gibberellic acid in alleviating effects of salinity in Petunia under in vitro

    Krupa-Małkiewicz M1, B Smolik2, M Sędzik2
    Phyton-International Journal of Experimental Botany, Vol.88, No.1, pp. 15-23, 2019, DOI:10.32604/phyton.2019.04670
    Abstract Salinity is one of the abiotic stresses that limits the growth and productivity of many crops. A possible survival strategy for plant under saline conditions is to use compounds that could minimize the harmful effects of salt stress on the plant development. The objective of the presented study was to investigate the effect of exogenous ascorbic acid (ASA) with or without gibberellic acid (GA3) on key growth and biochemical parameters in two petunia cultivars ‘Prism Rose’ and ‘Prism White’ under saline (150 mM NaCl) and non-saline in vitro condition. Nodal cutting with an axillary buds were used as explants. Application… More >

  • Open AccessOpen Access

    ARTICLE

    Heterologous expression of bacteriocin E-760 in Chlamydomonas reinhardtii and functional analysis

    Quezada-Rivera JJ1, RE Soria-Guerra2, FS Pérez-Juárez2, L Martínez-González2, SE Valdés- Rodríguez3, NL Vasco-Méndez1, JF Morales-Domínguez1
    Phyton-International Journal of Experimental Botany, Vol.88, No.1, pp. 25-35, 2019, DOI:10.32604/phyton.2019.04549
    Abstract The use of antimicrobial peptides (AMPs) synthesized by bacteria (bacteriocins) is an alternative for combating multidrug resistant bacterial strains and their production by recombinant route is a viable option for their mass production. The bacteriocin E-760 isolated from the genus Enterococcus sp. has been shown to possess inhibitory activity against Gram-negative and Gram-positive bacteria. In this study, the expression of a chimeric protein coding for E-760 in the nucleus of C. reinhardtii was evaluated, as well as, its antibacterial activity. The synthetic gene E-760S was inserted into the genome of C. reinhardtii using Agrobacterium tumefaciens. A transgenic line was identified… More >

  • Open AccessOpen Access

    ARTICLE

    Trichoderma spp. and Bacillus spp. as growth promoters in maize (Zea mays L.)

    López-Valenzuela BE1,2, Armenta-Bojórquez AD3, Hernández-Verdugo S4, Apodaca- Sánchez MA1, Samaniego-Gaxiola JA5, Valdez-Ortiz A6
    Phyton-International Journal of Experimental Botany, Vol.88, No.1, pp. 37-46, 2019, DOI:10.32604/phyton.2019.04621
    Abstract Microbes that are beneficial to plants are used to enhance the crop growth, yield and are alternatives to chemical fertilizers. Trichoderma and Bacillus are the predominant plant growth-promoting fungi and bacteria. The objective of this study was select, characterize, and evaluate isolates of Trichoderma spp. and Bacillus spp. native from the northern region of Sinaloa, Mexico, and assess their effect on growth promotion in maize (Zea mays L.). In greenhouse conditions, four Trichoderma isolates and twenty Bacillus isolates, as well as two controls, were tested in a completely randomized design with three replicates. We selected the two best strains of… More >

  • Open AccessOpen Access

    ARTICLE

    In vitro evaluation of native entomopathogenic fungi and neem (Azadiractha indica) extracts on Spodoptera frugiperda

    Hernandez-Trejo A1, B Estrada-Drouaillet1, JA López-Santillán1, C Rios-Velasco2, SE Varela-Fuentes1, R Rodríguez-Herrera3, E Osorio-Hernández1
    Phyton-International Journal of Experimental Botany, Vol.88, No.1, pp. 47-54, 2019, DOI:10.32604/phyton.2019.04611
    Abstract The control of Spodoptera frugiperda is based on synthetic insecticides, so some alternatives are the use of entomopathogenic fungi (EF) and neem extract. The objective of the study was to evaluate in vitro effectiveness of native EF and neem extracts on S. frugiperda larvae. Six EF were identified by DNA sequencing of ITS regions from three EF (Fusarium solani, Metarrhizium robertsii, Nigrospora spherica and Penicillium citrinum). They were evaluated in concentrations of 1 × 10⁸ spores/ mL. In addition, a second bioassay was carried out evaluating only F. solani, M. robertsii and N. sphaerica and the addition of vegetable oil.… More >

  • Open AccessOpen Access

    ARTICLE

    Growth and production characters of elymus cylindricus in different shortening heading time

    Chengcheng Li1, Chan Zhou2, Yunfei Yang1
    Phyton-International Journal of Experimental Botany, Vol.88, No.1, pp. 55-61, 2019, DOI:10.32604/phyton.2019.04577
    Abstract Ramet modules in a certain population differ in terms of functions, which accounts for different contributions of the same ramets. Shortening heading time brings about different contributions of such modules. Ramets heading one after another were treated as a continuum in respective cohorts of Elymus cylindricus aged two. The reproductive ramets that head earlier were marked with tags every four days during the whole heading stage from the beginning to the end, after which all the labeled ramets at the maturity period were gathered. The results showed that, the height and biomass of ramets, the length and biomass of inflorescences,… More >

  • Open AccessOpen Access

    ARTICLE

    Clustering of halophytic species from Cyprus based on ionic contents

    Ozturk M1, S Gucel2, V Altay3, MSA Ahmad4, MY Ashraf5, M Ashraf6
    Phyton-International Journal of Experimental Botany, Vol.88, No.1, pp. 63-68, 2019, DOI:10.32604/phyton.2019.04574
    Abstract This paper presents the work conducted on the chemical constituents of some common and widely distributed halophyte taxa from Cyprus with the aim that these studies will help in the evaluation of halophytes for different economical purposes. The plant species of Crithmum maritimum L., Limbarda crithmoides (L.) Dumort, Atriplex portulacoides L., Salsola kali L., Atriplex halimus L., Limonium oleifolium Mill., L. meyeri (Boiss.) Kuntze; and Tetraena alba (L.f.) Beier & Thulin were collected in the middle of July. The shoot tissue and leaf samples were collected from the natural habitats and left for drying under air circulation followed by placing… More >

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