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Macua J.I.,INTIA | Jimenez E.,INTIA | Daza C.,Research Center Agraria Finca La Orden Valdesequera | Gervas C.,AGRUCON | Lahoz I.,INTIA
Acta Horticulturae | Year: 2013

Lycopene is a natural component of tomatoes characterised by its high colouring capacity and its biological and antioxidant activity. Different studies have shown that the lycopene content in the tomato depends fundamentally on genetic (vegetable material) and environmental factors (i.e. mineral nutrient supply, soil conditions, crop seasons, etc.) and also on the degree of ripeness. The aim of this study was to analyse the influence of genotype on production and on different parameters of quality, principally colour and lycopene content of the processing tomato in Navarre. The trials were conducted from 2010 to 2011 in the experimental farm of the Instituto Navarro de Tecnologías e Infraestructuras Agroalimentarias (INTIA) in Cadreita's locality, in the south of Navarre. Six cultivars of processing tomato were trialed in the field, 4 of which carried alleles whose expression cause an increase in the concentration of lycopene in the fruit; and the other two were used as controls. Fruit yield was measured as total biomass production, commercial marketable yield, and average fruit weight. The fruit quality parameters measured were: pH, °Brix, Hunter-scale color (a/b) and lycopene content. The most productive cultivars ('H-9036', 'H-9661' and 'H-9997') contained the lowest concentration of lycopene in the fruit. Cultivars with high lycopene content exceeded the two controls in red color purity, measured as a/b. 'Agraz 5' and 'ISI-24424' cultivars had the highest content of lycopene. 'H-9997' showed a slightly higher concentration of this antioxidant than the controls. In this study, the genetic influence was crucial to the content of lycopene in the fruit, but there are the traditional cultivars that farmers are commonly growing which have more intensity color. Source

Morales-Rodriguez C.,Research Center Agraria Finca La Orden Valdesequera | Sanchez-Gonzalez A.,Servicio de Sanidad Vegetal | Conejo-Rodriguez Y.,Servicio de Sanidad Vegetal | Torres-Vila L.M.,Servicio de Sanidad Vegetal
Biocontrol Science and Technology | Year: 2015

The pathogenicity of Beauveria bassiana on Cerambyx welensii is first reported. Three native fungal isolates from Badajoz (Spain) were bioassayed on neonates using cork oak disks and LC50s were 1.16–1.76 × 105 and 0.30–0.61 × 105 spores/ml on the 7th and 14th day post-inoculation. The fungus is potentially a biocontrol agent of C. welensii. © 2015 Taylor & Francis. Source

Torres-Vila L.M.,Servicio de Sanidad Vegetal | Rodriguez-Molina M.C.,Research Center Agraria Finca La Orden Valdesequera
Arthropod-Plant Interactions | Year: 2013

It is widely assumed that in the late nineteenth century Lobesia botrana Den. and Schiff. shifted its food source from a wild shrub (Daphne gnidium L.) to vine (Vitis vinifera L.). We explored if host range expansion reflects an evolutionary host shift, whereby the new moth-host association was linked to adaptive changes. The reaction norms of larval survival, adult weight and development time were investigated in L. botrana under field conditions. Two moth strains were established from vine and daphne, and reciprocal infestations with neonate larvae were performed on both host plants over the three larval generations. All three traits showed phenotypic plasticity and genetic variation, variation for plasticity being only detected in larval survival. Comparisons between hosts within strains showed that (1) larval survival was higher on vine in 9 of 12 cases, (2) adult weight was lower on vine only in the first generation and (3) development time was shorter on vine in first generation, shorter on daphne in third generation and displayed a sex-related response in the second generation. Comparisons between strains within hosts evidenced moth-host adaptation as larval survival increased when strains developed on its original host. There was also evidence of moth-parasitoid coevolution because parasitism level was strain-dependent. We hypothesize that higher larval survival on vine, similar adult weight on both hosts in summer generations and lower predation risk in vineyards, might be among the fitness-related factors explaining evolutionary host shift to and worldwide adaptive success on vine of L. botrana. © 2012 Springer Science+Business Media Dordrecht. Source

Vila-Vicosa C.,University of Porto | Vazquez F.M.,Research Center Agraria Finca La Orden Valdesequera | Meireles C.,University of Evora | Pinto-Gomes C.,University of Porto
Lazaroa | Year: 2014

Vila-Viçosa, C., Vázquez, F.M., Meireles, C. & Pinto-gomes, C. Taxonomic peculiarities on marcescent Oaks (Quercus, Fagaceae) in southern Portugal. Lazaroa 35: 139-153 (2014). geobotanical studies on marcescent groves in southern Portugal have led to a clarification and updating of the taxonomical status of some Quercus species, after ambiguous and specific collections recorded through extensive fieldwork. We highlight the situation of Q. canariensis Willd. in Portugal, mainly referring to the hybrid-species Q. x marianica C. Vicioso, whose new status is proposed here. We also confirm and discuss the occurrence of two dubious taxa (Q. alpestris Boiss. and Q. estremadurensis O. schwarz) for Portuguese flora that are not listed or recognized in the main works, and we note some nomenclatural issues for the first (Q. alpestris). likewise, reference is made to another two nothospecies resulting from hybridization that have recently been recognized in this context, in addition to another four hybrids that are already known but still unfamiliar to the scientific community due to the controversial issue of hybridization within this genus. This study reveals the importance of taxonomical surveys for community ecology. Source

Vila-Vicosa C.,University of Porto | Vazquez F.M.,Research Center Agraria Finca La Orden Valdesequera | Mendes P.,University of Evora | Del Rio S.,University of Leon | And 3 more authors.
Plant Biosystems | Year: 2015

As relict traces of the Tertiary period, Quercus canariensis Willd. and the forests it forms comprise one of the most interesting woodlands, which prevails in southern Iberia with very particular edaphoclimatic envelopes. Combining phytosociological methodology with hierarchical cluster analyses, we aim to update the syntaxonomic scheme of the forests related to this species and the complex matrixes it forms with the hybrid species Quercus marianica C. Vicioso. We propose one new association from Portugal, in a total of four types of Mirbeck’s oak woodlands, in Southern Iberia. We conclude the necessity to maintain high standards on taxonomic and geobotanical surveys, with major biogeographic knowledge; it is indissociable from an accurate analysis and comprehension on the functional ecology and structure of these woodlands, regarding its dynamics. Therefore, their high conservation value, related to its relict status, supports the integration of these forests in Habitat 9240 (Annex B-I from Council Directive 92/43/EEC) in order to ensure its preservation. © 2015 Società Botanica Italiana. Source

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