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  • Open Access


    Study of the mitotic and meiotic chromosomes of sotol (Dasylirion cedrosanum Trel.)

    Hernández-Quintero JD1, MH Reyes-Valdés2, DV Mendoza-Rodríguez3, M Gómez-Martínez2, R Rodríguez-Herrera4

    Phyton-International Journal of Experimental Botany, Vol.84, No.1, pp. 107-112, 2015, DOI:10.32604/phyton.2015.84.107

    Abstract The genus Dasylirion is a group of plants typically present in the Chihuahuan Desert, perennial, with a dioecious sexual behavior and commonly called sotoles. This genus has been little studied from the biological point of view, and the bases of its reproductive response remain unknown. In this work we studied the chromosome number and meiotic response of Dasylirion cedrosanum in the county of Saltillo, Coahuila, located at the North East of Mexico. For the preparation of mitotic chromosomes, we used a technique based on enzymatic treatment with pectolyase and cellulase, as well as staining with acetocarmin… More >

  • Open Access


    Notes on the sexual condition of Myriophyllum aquaticum, Haloragaceae

    Torres Robles SS1, G Peter1,2, NM Tur3

    Phyton-International Journal of Experimental Botany, Vol.80, pp. 133-138, 2011, DOI:10.32604/phyton.2011.80.133

    Abstract Myriophyllum aquaticum (Vell.) Verdc. is native of South America and has a pantropical distribution. This species has been cited as dioecious, monoecious and polygamous. The purpose of this paper was to contribute to the discussion of its sexual condition, based on herbarium material, and supported by field observations. Herbarium material from Argentina was examined. Also, twenty branches from the Punta Lara Nature Reserve (Buenos Aires, Argentina) were periodically sampled to record the sex of flowers present on each whorl during the flowering period of 2002. Both in herbarium material and in field, we observed specimens with More >

  • Open Access


    Sex ratio and spatial distribution of pistillate and staminate plants of Dasylirion cedrosanum

    Reyes-Valdés MH, JD Hernández-Quintero1, YA Morales-Reyes2, DV Mendoza-Rodríguez, DU González-Uribe, F Ramírez-Godina, JA Villarreal-Quintanilla

    Phyton-International Journal of Experimental Botany, Vol.86, pp. 171-180, 2017, DOI:10.32604/phyton.2017.86.171

    Abstract The genus Dasylirion forms a group of well-represented perennial, dioecious species called “sotoles” in Mexico. This genus is a main component of the arid lands of northern Mexico and southern United States, and plays important ecological and economic roles. Four D. cedrosanum populations from northeastern Mexico were surveyed to gather statistics related to sex ratios and spatial distribution. The statistics were performed on an unbiased sample of 448 plants. Tests for sex ratio and spatial distribution were carried out. No evidence of departure from a 1:1 sex ratio proportion was found, both at the global level and More >

  • Open Access


    Nitric oxide metabolism in heart mitochondria

    Tamara ZAOBORNYJ, Darío E. IGLESIAS, Silvina S. BOMBICINO, Alberto BOVERIS, Laura B. VALDEZ*

    BIOCELL, Vol.40, No.1, pp. 55-58, 2016, DOI:10.32604/biocell.2016.40.055

    Abstract Normal cardiac function is accomplished through a continuous energy supply provided by mitochondria. Heart mitochondria are the major source of reactive oxygen and nitrogen species: superoxide anion (O2-) and nitric oxide (NO). NO production by mitochondrial NOS (mtNOS) is modified by metabolic state and shows an exponential dependence on Δψ. The interaction between mtNOS and complexes I and IV might be a mechanism involved in the regulation of mitochondrial NO production. NO exerts a high affinity, reversible and physiological inhibition of cytochrome c oxidase activity. A second effect of NO on the respiratory chain is accomplished More >

  • Open Access


    The role of mitochondria in inflammatory syndromes

    Virginia VANASCO, Timoteo MARCHINI, Natalia MAGNANI, Tamara VICO, Mariana GARCES, Lourdes CACERES, Alejandro GUAGLIANONE, Pablo EVELSON, Silvia ALVAREZ.*

    BIOCELL, Vol.40, No.1, pp. 47-50, 2016, DOI:10.32604/biocell.2016.40.047

    Abstract Several authors have addressed the importance of mitochondrial function in inflammatory syndromes, as it may play a role in the genesis of tissue injury. Sepsis and exposition to environmental particles are examples of inflammatory conditions. Sepsis occurs with an exacerbated inflammatory response that damages tissue mitochondria and impairs bioenergetic processes. One of the current hypotheses for the molecular mechanisms underlying the complex condition of sepsis is that enhanced NO production and oxidative stress lead to mitochondrial dysfunction, bioenergetic derangement and organ failure. The mechanism of particulate matter-health effects are believed to involve inflammation and oxidative More >

  • Open Access


    Alcohol hangover: impairments in behavior and bioenergetics in central nervous system

    Analia G. Karadayian1, Juanita Bustamante2, Silvia Lores-Arnaiz1, *

    BIOCELL, Vol.40, No.1, pp. 31-34, 2016, DOI:10.32604/biocell.2016.40.031

    Abstract Alcohol hangover (AH) is defined as the temporary state after alcohol binge-like drinking, starting when EtOH is absent in plasma. Results from our laboratory have shown behavioral impairments and mitochondrial dysfunction in an experimental model of AH in mice. Our model consisted in a single i.p. injection of EtOH (3.8 g/kg BW) or saline solution in male and female mice, sacrificing the animals 6 hours after injection. Motor and affective behavior together with mitochondrial function and free radical production were evaluated in brain cortex and cerebellum during AH. Results showed that hangover animals exhibited a… More >

  • Open Access


    Utilization of Multi-Tasking Non-Edible Plants for Phytoremediation and Bioenergy Source-A Review

    Ibrahim M. Abdelsalam1, Mostafa Elshobary1,3,*, Mohamed M. Eladawy1, Mohammed Nagah2

    Phyton-International Journal of Experimental Botany, Vol.88, No.2, pp. 69-90, 2019, DOI:10.32604/phyton.2019.06831

    Abstract Heavy metal contamination of land and freshwater resources is a serious concern worldwide. It adversely affects the health of animals, plants and humans. Therefore, remediation of toxic heavy metals must be highly considered. Unlike other techniques, phytoremediation is a holistic technology and can be used in large scale for soil remediation as it is costless, novel, environmentally-safe and solar-driven technology. Utilization of non-edible plants in phytoremediation is an ingenious technique as they are used to generate new bioenergy resources along with the remediation of contaminated soils. Some nonfood bioenergy crops such as Salix species, Miscanthus… More >

  • Open Access


    Enzymatic Conversion of Sugarcane Lignocellulosic Biomass as a Platform for the Production of Ethanol, Enzymes and Nanocellulose

    Cristiane S. Farinas*, José Manoel Marconcini, Luiz Henrique C. Mattoso

    Journal of Renewable Materials, Vol.6, No.2, pp. 203-216, 2018, DOI:10.7569/JRM.2017.6341578

    Abstract The conversion of sugarcane lignocellulosic biomass into fuels, chemicals and high-value materials using the biochemical pathway is considered the most sustainable alternative for the implementation of future biorefineries. Actually, the first large-scale cellulosic ethanol plants that have started operating worldwide apply the enzymatic hydrolysis process to convert biomass into simple sugars that are fermented to ethanol by yeasts. However, several technological challenges still need to be addressed in order to obtain commercially competitive products. This review describes current challenges and perspectives regarding the enzymatic hydrolysis step for processing sugarcane lignocellulosic biomass within the biorefinery. Recent More >

  • Open Access


    Production of Polyhydroxybutyrate (PHB) by Bacillus megaterium DSM 32 from Residual Glycerol of the Bioenergy Industry

    Enzo Alvarado-Cordero1, Gabriela Montes de Oca-Vásquez2, Reinaldo Pereira-Reyes2, José Vega-Baudrit2, Marianelly Esquivel-Alfaro1*

    Journal of Renewable Materials, Vol.5, No.3-4, pp. 323-331, 2017, DOI:10.7569/JRM.2017.634123

    Abstract Biodegradable polymers from renewable resources are generating growing interest in the plastic industry because they have properties similar to synthetic polymers. Polyhydroxyalkanoates, mainly polyhydroxybutyrate (PHB), have mechanical and physicochemical properties very similar to their synthetic counterparts. This work explores the use of residual glycerol from the bioenergy industry for the production of PHB by Bacillus megaterium DSM 32. The glycerol works as a source of carbon and energy. Raw glycerol was purified with sulfuric acid in order to neutralize saponified fatty acids. The purification process generated three different phases. One of the phases was the… More >

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