Home / Advanced Search

  • Title/Keywords

  • Author/Affliations

  • Journal

  • Article Type

  • Start Year

  • End Year

Update SearchingClear
  • Articles
  • Online
Search Results (20,209)
  • Open Access


    Comparative vegetative anatomy between halophytic Chloridoideae (Poaceae) with forage importance

    Pérez Cuadra V y V Cambi

    Phyton-International Journal of Experimental Botany, Vol.79, pp. 69-76, 2010, DOI:10.32604/phyton.2010.79.069

    Abstract Pappophorum phillippianum and Trichloris crinita grow in areas where traditional forages cannot establish. They are not food resources for excellence, but have some nutritional value to domestic livestock. Leaves and stems collected in a natural halophytic field were treated using current techniques for describing their epidermic and anatomical characteristics. Blades of both species have papillose adaxial epidermis, and it is also the case for the abaxial epidermis in T. crinita. Silica bodies are double-axe shaped or cross shaped. Both species show foliar glandular and eglandular trichomes. Only T. crinita shows prickles. Anatomically, both species show groups of fibers in the… More >

  • Open Access


    Defoliation frequency affects morphophysiological traits in the bunchgrass Poa ligularis

    Gittins1 C, CA Busso2, G Becker1, L Ghermandi3, G Siffredi1

    Phyton-International Journal of Experimental Botany, Vol.79, pp. 55-68, 2010, DOI:10.32604/phyton.2010.79.055

    Abstract Poa ligularis is an important forage in Patagonian rangelands. Populations of this perennial bunchgrass have been severely affected by overgrazing. We propose that increased defoliation frequencies will decrease (1) aerial- and belowground dry matter production, (2) root survival, and (3) concentration and content of total non-structural crown + root carbohydrates, and (4) increase root mortality. Five defoliation frequencies (plus 1 control) were applied in a representative grassland of the Occidental District in Patagonia during two consecutive growing seasons. All four hypotheses were rejected. Aerial and belowground dry matter production increased from one to two or three defoliations. Root production and… More >

  • Open Access


    Tillage systems and fertilization on yield of forage maize

    López Martínez JD, C Vázquez Vázquez, E Salazar Sosa, R Zúñiga Tarango, HI Trejo Escareño

    Phyton-International Journal of Experimental Botany, Vol.79, pp. 47-54, 2010, DOI:10.32604/phyton.2010.79.047

    Abstract About 15% of the world surface is subjected to the effect of man activities. The main causes of land surface degradation are livestock production, deforestation and inadequate agricultural practices. In Mexico, little attention has been given to soil conservation as a non-renewable natural resource. This has been mainly degraded by excessive use of agricultural machinery. As a result, 64% of the national territory suffers some degree of deterioration. Comarca Lagunera, located between Coahuila and Durango states in Mexico, is the main milk production region. In this region, 900000 t of cow manure are produced annually. This amount of cow manure… More >

  • Open Access


    Statistical models for evaluating the genotype-environment interaction in maize (Zea mays L.)

    Kandus1 M, D Almorza3, R Boggio Ronceros2, JC Salerno1

    Phyton-International Journal of Experimental Botany, Vol.79, pp. 39-46, 2010, DOI:10.32604/phyton.2010.79.039

    Abstract Our objective was to determine the genotype-environment interaction (GxE) in a hybrid integrated by maize lines either carrying or not balanced lethal systems. Experiments were conducted in three locations over a period of two years considering each yearlocation combination as a different environment. Yield data were analysed using the Additive Main Effects and Multiplicative Interaction (AMMI) model and the Sites Regression Analysis (SREG). Results were represented by biplots. The AMMI analysis was the best model for determining the interaction. More >

  • Open Access


    Association between microsatellites and resistance to Mal de Río Cuarto in maize by discriminant analysis

    Bonamico1 NC, MG Balzarini2, AT Arroyo2, MA Ibañez1, DG Díaz3, JC Salerno3, MA Di Renzo1

    Phyton-International Journal of Experimental Botany, Vol.79, pp. 31-38, 2010, DOI:10.32604/phyton.2010.79.031

    Abstract Resistance to Mal de Río Cuarto (MRC) disease in maize (Zea mays L.) is important in Argentina because the crop area involves a wide region where the disease is endemic. Molecular marker-assisted selection could be used as an additional selection tool to enhance precision of the genotype selection for resistance. It demands the identification of informative markers. Microsatellite (SSR) markers linked to gene(s) associated with resistance to MRC have been reported from previous QTL analyses. These analyses have been made on linkage maps derived from a relatively early mapping population. In advanced populations, where highly distinct genotypes are easily classified,… More >

  • Open Access


    Seedling growth response of Seriphidium quettense to water stress and non-water stress conditions

    Ahmad1 S, S Gul2, AKK Achakzai2, M Islam1

    Phyton-International Journal of Experimental Botany, Vol.79, pp. 19-23, 2010, DOI:10.32604/phyton.2010.79.019

    Abstract Seedling growth and development of Seriphidium quettense were examined under water stress (WS) and non-water stress (NWS) conditions. Seedlings were grown in pots to investigate their response to NWS conditions. Impact of WS on seedling growth was assessed in pre-existing plants grown under a semi-arid, natural environment. Seedling growth attributes were recorded on a monthly basis. Seedling growth exhibited a significant positive response under NWS conditions. Length of the main root axis at the first leaf emergence stage was 5.69 cm under NWS conditions; however, it was 4.8 cm in the natural environment (WS). At the end of the growing… More >

  • Open Access


    Heterosis and combining ability of tropical maize populations

    De la Cruz-Lázaro E1, G Castañón-Najera2, NP Brito-Manzano1, A Gómez-Vázquez1, V Robledo-Torres3, AJ Lozano del Río3

    Phyton-International Journal of Experimental Botany, Vol.79, pp. 11-17, 2010, DOI:10.32604/phyton.2010.79.011

    Abstract Estimation of genetic parameters using diallel crosses experiments aids to objective decision making in plant breeding programs. The objectives of this study were to estimate heterosis, the general combining ability (GCA) of eight tropical maize populations, and the specific combining ability (SCA) of 28 crosses. The populations evaluated were: population 21, 22, 23, 25, 32, 43, 49 and the commercial variety VS 536. The Griffing method 2 design was utilized to estimate GCA and SCA effects, on a complete randomized block design with two replications, at two planting dates. The diallel analysis showed significant differences (p≤0.01 and p≤0.05) among planting… More >

  • Open Access


    Seed, germination and seedling characterization of Cologania broussonetii (Balb.) DC.

    Lovey1 RJ, P Perissé2, C V ieyra3, JC Coraglio3

    Phyton-International Journal of Experimental Botany, Vol.79, pp. 5-10, 2010, DOI:10.32604/phyton.2010.79.005

    Abstract Cologania broussonetii (Balb.) DC. (Fabaceae) grows from the Bolivian eastern Andes to the north west of Argentina, Cordoba hills and San Luis Province. It is recognized as a native forage. The objectives of this study were to characterize the seed, the germination and the seedling of C. broussonetii. Seed structure was characterized through free hand sections and analyzed with optical and stereoscopic microscopy. The germination assay treatments were: (1) intact non-scarfied seeds at 25 °C constant, (2) scarified seeds at 25 °C constant, (3) intact non-scarified seeds at 20-30 °C alternating, and (4) scarified seeds at 20-30 °C alternating. Results… More >

  • Open Access


    Antibacterial activity of Falkenbergia hillebrandii (Born) from the Indian coast against human pathogens

    Manilal1 A, S Sujith2, J Selvin3, C Shakir4, G Seghal Kiran5

    Phyton-International Journal of Experimental Botany, Vol.78, pp. 161-166, 2009, DOI:10.32604/phyton.2009.78.161

    Abstract The antibacterial property of the red algae, Falkenbergia hillebrandii (Born) collected from the southwest coast of India (Indian Ocean) was evaluated against three multidrug resistant human pathogens. Four different solvents: ethyl acetate, dichloromethane, methanol and phosphate buffer saline (PBS) were used with this purpose. Dried samples extracted with methanol showed broadest and highest antimicrobial activity when compared to other solvents. However, PBS extract showed no antibacterial activity. The highly active compounds red alga, F. hillebrandii were fractionated and purified using different chromatographic systems, including reverse phase HPLC and GCMS. The analysis revealed that the most abundant metabolite was the oleic… More >

  • Open Access


    Effects of fusaric acid on Zea mays L. seedlings

    Diniz SPSS, RC Oliveira

    Phyton-International Journal of Experimental Botany, Vol.78, pp. 155-160, 2009, DOI:10.32604/phyton.2009.78.155

    Abstract The effects of fusaric acid, a mycotoxin produced by Fusarium sp, were investigated in relation to its action on corn seedlings. The mycotoxin inhibited the development of corn seedlings at 0.2 mM, causing root length reduction. Anatomically, alterations were only visible from 0.5 mM fusaric acid, directly influencing the cell differentiation process. Precocious differentiation reduces the elongation region. This explains (1) that root shortening is morphologically visible, and (2) the differentiation of a great number of lateral roots nearby the apex, which can be seen in longitudinal cuts. More >

Displaying 14331-14340 on page 1434 of 20209. Per Page