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  • Open Access

    ARTICLE

    Long term diazotrophic cultivation induces phycobiliprotein production in Anabaena variabilis IMU8

    Mohammed Fadhil HADDAD1,2,3, Tugba DAYIOGLU1,2, Barbaros NALBANTOĞLU2, Turgay CAKMAK1,*

    BIOCELL, Vol.43, No.4, pp. 327-333, 2019, DOI:10.32604/biocell.2019.08522

    Abstract Cyanobacteria are considered as a sustainable feedstock for the production of biochemically active compounds such as phycobiliproteins (PBPs). In this study, the impact of nitrogen (N) and phosphorus (P) availability on PBP production of “N-free acclimated” Anabaena variabilis IMU8 was analyzed. Upon isolation and identification, the cyanobacterium has been maintained in N-free BG-11 medium for more than 20 months. For experimentation, the strain was incubated in N-replete, N-depleted, N-P-depleted BG-11 medium. Long-term diazotrophic cultivation of A. variabilis IMU8 resulted in elevated PBP productivity with a limited impact on growth. When compared to N-depleted ones, N supply stimulated a slight induction… More >

  • Open Access

    ARTICLE

    Organogenesis and plant regeneration of Arachis villosa Benth. (Leguminosae) through leaf culture

    MARÍA LAURA FONTANA, LUIS AMADO MROGINSKI, HEBE YOLANDA REY*

    BIOCELL, Vol.33, No.3, pp. 179-186, 2009, DOI:10.32604/biocell.2009.33.179

    Abstract With the aim of developing an efficient plant regeneration protocol, leaflet explants of three accessions of Arachis villosa Benth. (S2866, S2867 and L97) were cultured on basic Murashige and Skoog medium supplemented with different combinations of plant growth regulators: α-naphthalenacetic acid, indole-3-butyric acid, 6-benzylaminopurine, kinetin and thidiazuron. The accession L97 was the only one able to differentiate buds through indirect organogenesis. The most suitable combination for bud regeneration was the basic medium added with 13.62 μM thidiazuron and 4.44 μM 6-benzylaminopurine. These results show the important role of the genotype in morphogenetic responses and the organogenetic effect of thidiazuron in… More >

  • Open Access

    ARTICLE

    Ecological indicators of the weed community in the cultivation of mango Mangifera indica L. in Campeche State, Mexico

    Tucuch-Cauich FM1, F Orona-Castro1, IH Almeyda-León2, LA Aguirre-Uribe3

    Phyton-International Journal of Experimental Botany, Vol.82, pp. 145-149, 2013, DOI:10.32604/phyton.2013.82.145

    Abstract Ango is the main species of fruit in the state of Campeche, Mexico, due to the economic benefits generated because of its production and marketing. Among the biotic problems that affect this crop in the region are weeds, which involve a heavy economic investment for their management. Under this scenario, it is important the development of ecological weed studies to generate information that help us to design strategies for managing the problem. During January to June 2010 a floristic study was developed on the population of weeds that compete with mango in the locations of Cayal and Castamay, at the… More >

  • Open Access

    ARTICLE

    Production system and value chain in oregano (Origanum sp.) cultivation in the province of Córdoba (Argentina)

    Argüello JA1, SB Núñez1, V Davidenco1, DA Suárez2, L Seisdedos1, MC Baigorria1, N La Porta1, G Ruiz1, V Yossen1

    Phyton-International Journal of Experimental Botany, Vol.81, pp. 23-34, 2012, DOI:10.32604/phyton.2012.81.023

    Abstract The aim of the present review was to analyze and identify the problems associated with the Production System and Chain Value of Oregano in the area of Traslasierra Valley, province of Córdoba. Traditional ecotypes, such as Criollo, Chileno II and Compacto, are cultivated in the region, as well as new ecotypes such as “Serrano Cordobés”, “Flor Rosa” and “Rosa Fuerte”. The Traslasierra Valley of Córdoba is a very suitable area for the production and for increasing the production of oregano. However, the agricultural management of the different oregano ecotypes should be optimized. Ecophysiological studies conducted to date in the region… More >

  • Open Access

    ARTICLE

    Amaranthus (Amaranthus spp.) grain yield and forage quality after cultivation at various densities in Northeastern Mexico

    García-Pereyra1 J, CGS Valdés-Lozano2, E Olivares-Saenz2, O Alvarado-Gómez2, G Alejandre-Iturbide3, E Salazar-Sosa4, H Medrano-Roldán5

    Phyton-International Journal of Experimental Botany, Vol.78, pp. 53-60, 2009, DOI:10.32604/phyton.2009.78.053

    Abstract We tested five Amaranthus genotypes (A. hypochondriacus 655, 653, 153-5-3, and Criollo Tlaxcala and A. cruentus genotype 33) at four population densities (31,250; 41,666; 62,500 and 125,000 plants/ha, during spring-summer (PV; July-December) 2000 and autumn-winter (OI) 2001 and 2002. Studies were conducted at the experimental station of the Agronomy Faculty of the Universidad Autónoma de Nuevo León, Mexico. A split plot experimental design on completely randomized blocks was used, with two replicates. The evaluated agronomic characteristics were grain yield (RG), dry matter yield (MS), plant height (AP), stem diameter (DT) and panicle length (LP). Crude protein (PC), ashes (C), acid… More >

  • Open Access

    ARTICLE

    Relative susceptibility to blackpoint in durum wheat varieties of Argentina

    Miravalles1 M, V Beaufort2, F Möckel1

    Phyton-International Journal of Experimental Botany, Vol.77, pp. 263-273, 2008, DOI:10.32604/phyton.2008.77.263

    Abstract Blackpoint incidence was assessed on grain from six durum wheat (Triticum durum Desf.) varieties grown during crop season 2004-05 at four sites, in the traditional durum wheat growing region of Argentina. Broad differences in grain discolouration were detected among sites and varieties, together with significant variety x site interactions. Among varieties, those with lower thousand grain weight and higher widthto- length ratio (proportionally shorter grains) showed less susceptibility to this disease than heavy/large grain varieties. Differences among sites in the levels of blackpoint incidence were also related to the physical attributes of grains revealing the strong influence of the environment… More >

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