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  • Open Access

    ARTICLE

    Assessment of the Contribution of Foliar Trichomes towards Allelopathy

    Waseem Mushtaq1, M.B. Siddiqui1, Hesham F. Alharby2, Khalid Rehman Hakeem2,3,*

    Phyton-International Journal of Experimental Botany, Vol.89, No.2, pp. 291-301, 2020, DOI:10.32604/phyton.2020.08740 - 22 April 2020

    Abstract Plant trichomes vary in their structure and cellular composition. Glandular trichomes contain a bulk of specific (secondary) metabolites of diverse nature. Trichomes are connected with various adaptive processes, which include protection against herbivores and pathogens as well. Our study investigates the allelopathic contribution of structures present on the leaf surface of Nicotiana plumbaginifolia Viv. against seedling growth of Cicer arietinum L. The infusion obtained after dipping Nicotiana leaves in Dichloromethane (DCM) for 10 seconds (s) was the most phytotoxic among all the infusions. The observed inhibition in Cicer growth was not only dependent on type of infusion but More >

  • Open Access

    ARTICLE

    Total Phenols, Flavonoids and Antioxidant Activity in Annona muricata and Annona purpurea Callus Culture

    M. Y. Ovando-Domínguez1, M. C. Luján-Hidalgo1, D. González-Mendoza2, A. A. Vargas-Díaz3, N. Ruiz-Lau1,4, F. A. Gutiérrez-Miceli1, C. A. Lecona-Guzmán1,*

    Phyton-International Journal of Experimental Botany, Vol.88, No.2, pp. 139-147, 2019, DOI:10.32604/phyton.2019.06546

    Abstract Callus cultures of Annona muricata and Annona purpurea were induced in Murashige and Skoog (MS) medium supplemented with different concentrations of 1-naphthylacetic acid (NAA), 6-benzyladenine (BA) and 2,4-dichlorophenoxyacetic acid (2,4-D) utilized hypocotyls with explant. The highest percentage of callus formation was the treatment supplemented with 3 mg L-1 NAA for A. muricata (100%) while for A. purpurea in lower percentage (75%). BA stimulated the formation of shoots in all the evaluated concentrations, being the concentration of 2 mg L-1 the one that induced the greater formation of shoots for A. muricata (23 shoots/explant) and A. purpurea (28 shoots/explant). The content… More >

  • Open 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 More >

  • Open Access

    ARTICLE

    Taxus globosa S. cell lines: Initiation, selection and characterization in terms of growth, and of baccatin III and paclitaxel production

    DULCE MA. BARRADAS-DERMITZ1,*, PATRICIA M. HAYWARD-JONES2, MARTÍN MATA-ROSAS3, BEATRIZ PALMEROSSÁNCHEZ2, OSCAR B. J. PLATAS-BARRADAS4, RODOLFO F. VELÁSQUEZ-TOLEDO2

    BIOCELL, Vol.34, No.1, pp. 1-6, 2010, DOI:10.32604/biocell.2010.34.001

    Abstract Of the initial six cell lines originating from explants of Taxus globosa, or Mexican yew (stem internode, leaves and meristematic tissue), three were selected for their microbial and oxidation resistance, two from leaves and the other from stem internode. A study of their behavior, both in terms of cell growth, and of baccatin III and paclitaxel production, was developed in suspension cultures with an initially standardized biomass (fresh weight 0.23 g/L) using modified Gamborg’s B5 medium, and an elicitor (methyl jasmonate), on either the first or seventh day of culture, at several levels (0, 0.1, 1, More >

  • Open Access

    REVIEW

    Minireview: C2- and C4-position 17β-estradiol metabolites and their relation to breast cancer

    ANNIE JOUBERT1*, HERMIA VAN ZYL1, JOHANNES LAURENS2, MONA-LIZA LOTTERING1

    BIOCELL, Vol.33, No.3, pp. 137-140, 2009, DOI:10.32604/biocell.2009.33.137

    Abstract C2- and C4-position 17β-estradiol metabolites play an important role in breast carcinogenesis. 2-Hydroxyestradiol and 4-hydroxyestradiol are implicated in tumorigenesis via two pathways. These pathways entail increased cell proliferation and the formation of reactive oxygen species that trigger an increase in the likelihood of deoxyribonucleic acid mutations.
    2-Methoxyestradiol, a 17β-estradiol metabolite, however, causes induction of apoptosis in transformed and tumor cells; thus exhibiting an antiproliferative effect on tumor growth. The 4-hydroxyestradiol:2- methoxyestradiol and 2-hydroxyestradiol:2-methoxyestradiolratios therefore ought to be taken into account as possible indicators of carcinogenesis. More >

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