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 >

Urrutia J¹, R Rivera^1,2, 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 >

Rojas-Herrera R¹, M Zamudio-Maya¹, L Arena-Ortiz², RC Pless³, A O’Connor-Sánchez⁴

Phyton-International Journal of Experimental Botany, Vol.80, pp. 231-240, 2011, DOI:10.32604/phyton.2011.80.231

Abstract Mexico counts among the five countries with the highest biodiversity in the world. In the Yucatán Peninsula, there are aquatic ecosystems with a very special microbial diversity. These ecosystems are essential for the ecological equilibrium of the region, and are seriously threatened by human activities. Access and knowledge of the microbial resources of these environments have an enormous scientific interest, and could potentially result in biotechnological products which could lead to more efficient and environmentally friendly processes; it could also offer a full arsenal of microorganisms and/or novel molecules to the local and world industry to face the current needs.… More >

Boccanelli SI

Phyton-International Journal of Experimental Botany, Vol.80, pp. 227-229, 2011, DOI:10.32604/phyton.2011.80.227

Abstract This article has no abstract. More >

Kiehr M, R Delhey

Phyton-International Journal of Experimental Botany, Vol.80, pp. 221-225, 2011, DOI:10.32604/phyton.2011.80.221

Abstract Freckles is a new blemish of white-scaled onion bulbs in the Lower Rio Colorado Valley (Argentina) characterized by the formation of small sclerotia imbedded in the dry scale tissue. The causal agent has been isolated from scales and symptomless roots of onion and was identified as Sclerotium sp. Although in its host range and morphology it resembles Sclerotium cepivorum, it is quite different with respect to other cultural and pathological traits. In inoculation experiments, onion and garlic plants could be infected and the typical sclerotia were formed, but no rot, a symptom characteristic for S. cepivorum, nor any other tissue… More >

Zappacosta D¹, M Meier¹, A Carrera¹, G Pacheco², S Cardone³, JP Selva¹, V Echenique¹

Phyton-International Journal of Experimental Botany, Vol.80, pp. 211-220, 2011, DOI:10.32604/phyton.2011.80.211

Abstract Weeping lovegrass is well adapted for forage production and useful for soil conservation in semiarid regions, constituting a morphologically diverse group. Diploid genotypes are unfrequent and reproduce sexually, whereas the tetraploids and plants of higher ploidy levels reproduce by apomixis. In the present work RAPD, AFLP and EST-SSR were used in order to assess the reproductive mode through progeny tests, to determine intracultivar homogeneity or seed purity, to establish genetic relationships among the cultivars within the complex and to characterize the new materials obtained by our group. Eight commercial cultivars and three new plant materials were analyzed. Uniform and variable… More >

Mirleau-Thebaud V^1,2, JD Scheiner¹, J Dayde¹

Phyton-International Journal of Experimental Botany, Vol.80, pp. 203-210, 2011, DOI:10.32604/phyton.2011.80.203

Abstract Plant yield and oil content determine sunflower production. Those plant production determinants depend in turn on the plant–environment interaction. In the South West of France, there have been recent advances in soil tillage. To date, 35% of the soil surface dedicated to sunflower is cropped under a reduced tillage system. Major constraints to sunflower cropping are water stress and cryptogamic diseases. The second most important sunflower disease in the South West of France is premature ripening caused by Phoma macdonaldii. Aims of this work were to: 1) understand how these factors influence sunflower yield, and 2) quantify the fatty acid… More >

Villamil MB¹, NM Amiotti², N Peinemann³

Phyton-International Journal of Experimental Botany, Vol.80, pp. 193-201, 2011, DOI:10.32604/phyton.2011.80.193

Abstract Demand for greater cattle production at the El Caldenal area in central Argentina has resulted in overgrazing in a patchy grassland structure. Patches are clearly identified on the basis of dominant plant species resulting from their grazing history. Our primary objective was to examine the influence of individual plants at each patch on the local multivariate pattern of soil nutrients, assessing the magnitude of the association between the concentration of nutrients in the plant and its underlying soil. Canonical discriminant analysis highlighted the important role of soil organic matter, available P, and Zn content of soils to segregate among patches.… More >

Martínez-Rubin de Celis E¹, E Rivas-Robles², L Martínez-Corral³, J Frías-Ramírez¹, J Orozco-Vidal¹, M Fortis-Hernández¹, MA Segura Castruita¹

Phyton-International Journal of Experimental Botany, Vol.80, pp. 189-192, 2011, DOI:10.32604/phyton.2011.80.189

Abstract Soil compaction or increase of soil bulk density (Da) as a result of applied loads is expressed as an increase in soil bulk density and soil resistance to penetration. Factors in soil compaction due to vehicular traffic include: the amount of load, soil moisture content and the number of passes over the land. Soil compaction results in the formation of layers that can limit or delay (1) the aeration process; (2) root penetration and infiltration; (3) absorption capacity and soil water retention; (4) nutrient movement; (5) heat transfer, and (6) seedling emergency. At the same time, it will produce plants… More >

Deng JB¹, CB Ding¹, L Zhang¹, YH Zhou², RW Yang¹

Phyton-International Journal of Experimental Botany, Vol.80, pp. 181-188, 2011, DOI:10.32604/phyton.2011.80.181

Abstract Four isozymes, superoxide dismutase (SOD), polyphenol oxidase (PPO), malate dehydrogenase (MDH) and cytochrome oxidase (COD) were studied for identification of six herbal species (Curcuma L.). All the 37 study specimens produced a total of 168 polymorphism isozyme bands. The genetic distance coefficients (GS) varied from 0.08 to 0.54. The dendrogram, obtained according to the polymorphism isozyme bands by the UPGMA method with the software NTSYS–pc2.1, contributed to improve the resolution of phylogeny. From the dendrogram, it was possible to differentiate between the wild and cultivated specimens of C. longa, and within C. sichuanensis species. More >