Open Access
ARTICLE
Urrutia J1, R Rivera1,2, E Hauenstein1, P De los Ríos1
Phyton-International Journal of Experimental Botany, Vol.81, pp. 7-13, 2012, DOI:10.32604/phyton.2012.81.007
Abstract Macrophytes of inland waters are a group of great biological interest. Although lentic systems are ideal for their growth, their presence is not so evident in oligotrophic water bodies, proliferating largely in areas with some level of contamination. A useful tool to determine the presence of a regulatory factor in the composition of these and other biological communities is the use of null models. This analysis was applied based on the co-occurrence of species through a matrix of presence and absence, with the purpose of determining the presence of randomness in species associations. The three models tested, determined the presence… More >
Open Access
ARTICLE
Gaspar-Peralta P1, JC Carrillo-Rodríguez1, JL Chávez-Servia
Phyton-International Journal of Experimental Botany, Vol.81, pp. 15-22, 2012, DOI:10.32604/phyton.2012.81.015
Abstract In order to evaluate the agronomic behavior, genotypic variation, lycopene content, and other components of fruit quality, eight advanced tomato lines were planted in greenhouses during two crop cycles, August-December 2008 and February-July 2009. Tomato lines showed significant differences in leaf length (LL), stem diameter (SD), number of flowers per branch (FLNB), number of fruits per branch (FRNB), locules per fruit (LPF), and fruit length (FRL), and the greatest phenotypic expression in fruit traits was quantified in August-December 2008. Environmental variance was significantly higher than the genotypic and genotype-environment interaction variances in LL, FRNB, fruits per plant, average weight of… More >
Open Access
ARTICLE
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
Salinas1 R, E Sánchez2, JM Ruíz3, MT Lao1, L Romero3
Phyton-International Journal of Experimental Botany, Vol.81, pp. 35-39, 2012, DOI:10.32604/phyton.2012.81.035
Abstract We determined the (1) deficiency, (2) apropriate level and (3) toxiticity of phosphorus on the total biomass production and yield of judía verde (Phaseolus vulgaris L.) cv. ‘Strike’. Studies were conducted in a growth chamber using pots. Phosphorus levels in the nutrient solution were P1: 0.5 mM; P2: 1 mM; P3: 2 mM; P4: 4 mM; P5: 6 mM, and P6: 8 mM. The optimum phosporus concentration was P3. As soil phosphorus concentration increased, concentration of this nutrient also increased in the plant. Leaf, petiole and shoot biomasses were more sensitive to deficiency than to toxicity of phosphorus. However, root… More >
Open Access
ARTICLE
Li SL, YB Zhang, YK Rui, XF Chen
Phyton-International Journal of Experimental Botany, Vol.81, pp. 41-43, 2012, DOI:10.32604/phyton.2012.81.041
Abstract Minerals are essential for human nutrition and plant growth and development. Nutrient concentrations in plants are related to many factors, including soil types. The impact of soil types on nutrient accumulation in corn, grown in black and sandy soils, was studied in the same area and management conditions. The results showed that the descending order of nutrient content was Ca > Fe > Zn > Mn > Cu > Se > Mo in both soil types. The contents of Ca, Mn, Fe, Se and Mo in kernels of corn grown in sandy soil were higher than those in corn grown… More >
Open Access
ARTICLE
Campaña-Torres A1, LR Martínez-Córdova2, M Martínez-Porchas3, JA López-Elías2, MA Porchas-Cornejo1
Phyton-International Journal of Experimental Botany, Vol.81, pp. 45-50, 2012, DOI:10.32604/phyton.2012.81.045
Abstract An experiment was conducted to evaluate the effect of different culture media on the productive response and proximate composition of microalgae, Nannochloropsis oculata, and the subsequent effect of such microalgae on the productive response and proximate composition of the rotifer Brachionus rotundiformis. Microalgae were cultured in different media: Guillard F/2 (control), an agricultural fertilizer, and an aquacultural fertilizer. Thereafter, such microalgae were used to feed rotifers. A better productive response was observed when microalgae were cultured in the agricultural fertilizer. In addition, the chemical proximate composition of microalgae was influenced by the type of culture medium used. When used as… More >
Open Access
ARTICLE
Guan Z-J1,2,*, B Guo1,*, Y-L Huo3, J-K Dai4, Y-H Wei1
Phyton-International Journal of Experimental Botany, Vol.81, pp. 51-58, 2012, DOI:10.32604/phyton.2012.81.051
Abstract The initiation and development of organogenic buds and somatic embryos in HBsAg-transgenic cherry tomato (Lycopersicum esculentum var. cerasiforme) mutant were studied histologically. The leaf explants of the mutant were cultured on Murashige & Skoog (MS) basal medium supplemented with 6-BA 1.0 mg/L and IAA 0.05 mg/L for callus induction. Histological studies on the leaf explants of the mutant at various developmental stages revealed that organogenic buds first appeared in the axillary position of explants on the 14th cultured day, and then somatic embryos formed in the same mutant explants after 35 days of culture. Transmission electron microscopy and scanning electron… More >
Open Access
ARTICLE
Rubí Arriaga M1, A González Huerta1, V Olalde Portugal2, BG Reyes3, AM Castillo González4, DJ Pérez López1, LI Aguilera Gómez5
Phyton-International Journal of Experimental Botany, Vol.81, pp. 59-68, 2012, DOI:10.32604/phyton.2012.81.059
Abstract Lilium is an ornamental species which production and commercialization have a greater daily economical importance because of its acceptance by the market. Crop of Lilium is currently under an intensive production system based upon an indiscriminate use of chemical fertilizers, without precise plant nutrition recommendations. Because of this, producers are forced to set up sustainable production processes without affecting the quality of the product, since worldwide consumers prefer products that have been correctly harvested. Objectives of this study were to assess the main effects and the interactions of phosphorus applications and the inoculation with Glomus fasciculatum and Bacilllus subtilis, on… More >
Open Access
ARTICLE
Ochoa Fuentes YM1, E Cerna Chávez1, J Landeros Flores1, S Hernández Camacho2, JC Delgado Ortiz1
Phyton-International Journal of Experimental Botany, Vol.81, pp. 69-73, 2012, DOI:10.32604/phyton.2012.81.069
Abstract We evaluated the in vitro antifungal activity of extracts of peruvian peppertree (Shinu smolle), cherimoya (Annona cherimola), cinnamon (Cinnamomum zeylanicum) and tobacco (Nicotiana glauca) on the mycelial growth and sporulation of Fusarium oxysporum, Fusarium culmorum and Fusarium solani. The research was conducted at the Universidad Autónoma de Aguascalientes (UAA) and the Universidad Autónoma Agraria Antonio Narro (UAAAN). The species of Fusarium were previously identified in the UAA Laboratory of Parasitology. The extracts were obtained in the laboratory of Toxicology of the UAAAN. The methodology of poisoned culture medium was used to determine the (1) inhibition of mycelial growth, (2) average… More >
Open Access
ARTICLE
Shang ZH1,2, SG Xu1
Phyton-International Journal of Experimental Botany, Vol.81, pp. 75-79, 2012, DOI:10.32604/phyton.2012.81.075
Abstract Pedicularis kansuensis is a dominating poisonous weed, and it might have allelopathic effects on other native grasses in alpine meadows. An experiment was conducted to examine a range of concentrations of aqueous whole plant extracts (25, 12.5, 2.5, 1.25, 0.25 and 0.0 g/L) of P. kansuensis, prepared at the flowering stage on seed germination and seedling growth of two native grasses (Poa pratensis and Elymus nutans). High concentrations of aqueous extracts of P. kansuensis inhibited seed germination and seedling growth of P. pratensis (p<0.05). Most aqueous extracts of P. kansuensis had a stimulatory (p<0.05) effect on E. nutans. Our results… More >
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