Ferrante D^1,2, A Cesa^1,2, S Lewis², G Jaurena³

Phyton-International Journal of Experimental Botany, Vol.83, pp. 127-131, 2014, DOI:10.32604/phyton.2014.83.127

Abstract In plants, compensatory growth takes place when the positive effects of defoliation compensate the negative ones, and defoliated plants show a similar or increased production in relation to non-defoliated plants. Our objective was to evaluate the ability to compensate defoliation of Poa spiciformis, a forage perennial tussock grass in southern Patagonia (Argentina). The experiment was performed in potted plants that grew under controlled conditions of watering and fertilization. Three defoliation frequencies were imposed (zero, three or five) using 20-25 day intervals among them. Harvest intensity was always equivalent to 50% of the aerial biomass. Fifteen plants were sampled per treatment,… More >

Orrabalis C^1,2, H Gorostegui^1,2, E Calandri¹, C Guzmán¹

Phyton-International Journal of Experimental Botany, Vol.83, pp. 117-125, 2014, DOI:10.32604/phyton.2014.83.117

Abstract We evaluated the possibility of making jam (product A) and simile sweet potato jam (product B) from the edible pulp of the fruits of Geoffroea decorticans. The first step was the chemical characterization of the flour (pulp) highlighting their carbohydrate (85.6%), protein (9.4%) and mineral (4.2%) concentrations. Sucrose (29.5%), glucose (3.80%) and fructose (5.30%) levels were quantified using gas chromatography. Contents of protein (5.7%), minerals (3.4%), dietary fiber (0.97%), sucrose (46.8%), glucose (1.9%) and fructose (2.4%) were very good in jam. The simile sweet potato jam had low calories (140 Kcal/100g) and provided protein (4.6%). During the 12-month-storage period, the… More >

Hernández-Castillo FD¹, RH Lira-Saldivar², G Gallegos-Morales¹, M Hernández-Suárez¹, S Solis-Gaona²

Phyton-International Journal of Experimental Botany, Vol.83, pp. 49-55, 2014, DOI:10.32604/phyton.2014.83.049

Abstract One of the most severe phytosanitary problems that face chili pepper producers in Mexico, and in many other parts of the world, is the disease known as "secadera" or wilting, caused by diverse pathogens. These patogens are mainly controlled with synthetic pesticides, thus causing a severe ecological impact, toxicity to humans, generation of plant resistance to fungicides, and increments of production costs. Because of this, it rises the need of finding more environmentally friendly options. We evaluated rhizospheric bacteria as a possible biological control of pepper wilt. We used three bacterial strains belonging to the Bacillus genera. These strains were… More >

Gutiérrez-Díez A¹, GE Salinas-García¹, L Iracheta-Donjuan², JA Torres-Castillo¹, N Mayek-Pérez³

Phyton-International Journal of Experimental Botany, Vol.82, pp. 203-208, 2013, DOI:10.32604/phyton.2013.82.203

Abstract Gene and quantitative trait loci (QTLs) localization in a model species allow to know their organization in the genome, and the possibility for the isolation and cloning of genes with agronomic importance. Seventy-three recombinant inbred lines (RILs) derived from the cross of Arabidopsis thaliana (L.) Heynh. ecotypes Columbia (Col) x Landsberg erecta (Ler) were grown in a greenhouse under contrasting soil moisture conditions (irrigated and water deficits). During their growth, some phenological (days to flowering) and plant growth traits (plant height, and number of nodes and leaves per plant) were measured. Significant differences for plant height and nodes per plant… More >

Juárez-Maldonado¹ A, JL Rosales-Velázquez², H Ortega-Ortiz³, M Cabrera-De-la-Fuente¹, H Ramírez¹, A Benavides-Mendoza¹

Phyton-International Journal of Experimental Botany, Vol.82, pp. 91-97, 2013, DOI:10.32604/phyton.2013.82.091

Abstract Nanotechnology is currently an important worldwide study field because it provides control on matter at a nanometric scale. In food and agricultural fields, the applications of this technology are in early stages. Onion is one of the main vegetables grown in the world. Onion is a low calorie food which contains a large amount of flavonoids. In this work, silver nitrate application in onion was evaluated. An onion crop was developed at the University Antonio Narro in Saltillo, Mexico. Two methods of silver nitrate application were used (a nutritive solution: 0, 20, 40 and 80 mg/L of AgNO₃; and foliar… More >

Bhat RB

Phyton-International Journal of Experimental Botany, Vol.81, pp. 211-213, 2012, DOI:10.32604/phyton.2012.81.211

Abstract Types of leaf margin serration were investigated in ten species of the genus Hibiscus. Types and frequency of serration varied widely from species to species, from common to occasional to rare. Leaf serration is an important taxonomical feature in Hibiscus. More >

Gaspar-Peralta P¹, JC Carrillo-Rodríguez¹, JL Chávez-Servia, AM Vera-Guzmán², I Pérez-León¹

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 >

Perissé P¹, RJ Lovey², CV Arias³, M Scandaliaris², ML Molinelli¹

Phyton-International Journal of Experimental Botany, Vol.80, pp. 73-78, 2011, DOI:10.32604/phyton.2011.80.073

Abstract Dicliptera squarrosa Nees, “canario rojo”, “coral de campo” or “ajicillo”, is a perennial native herb of the north, center and east of Argentina. It is cited as an ornamental, apiarian, emergency forage plant, and as a glyphosate-tolerant weed. The objectives were to characterize the seed and seedling of D. squarrosa and to establish the relationships with the structures that ensure its survival. The materials were treated with the conventional methodology to perform morphological studies, using stereoscopically and optical microscopy. The germination assays were carried out to determine the germination percentage and the germination type. The weight of 1000 seeds was… More >

Tizón¹ FR, DV Peláez^1,2,3, OR Elía^1,2

Phyton-International Journal of Experimental Botany, Vol.79, pp. 141-146, 2010, DOI:10.32604/phyton.2010.79.141

Abstract Fire plays a fundamental role in the structure of vegetation communities in the Caldenal. However, this effect has decreased considerably since the introduction of domestic cattle, which reduces the amount of fine combustible material. Objectives of this study were (1) to analyze the diversity and composition of a typical vegetation community in the south of the Caldenal after exposure to different fire frequencies, and (2) to show the convenience of using controlled fire for reversing the processes of scrub formation to states with more diverse and productive grassland communities. Forty-five herbaceous and woody species were recorded. Treatment C (control) showed… More >

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 >