Prolamin content and grain weight in RNAi silenced wheat lines under different conditions of temperature and nitrogen availability

Temperature and nitrogen (N) availability are two important environmental factors that may produce important changes in grain composition during grain filling of bread wheat. In this study, four wheat lines with the down-regulation of gliadins by means of RNA interference (RNAi) have been characterized to determine the effect of thermal stress and N availability on grain weight and quality; with focus on gliadin and glutenin protein fractions. Grain weight was reduced with heat stress (HS) in all RNAi lines, whereas gliadin content was increased in the wild-types. With respect to gliadin content, RNAi lines responded to HS and N availability differently from their respective wild-types, except for ω-gliadin content, indicating a very clear stability of silencing under different environmental conditions. In a context of increased temperature and HS events, and in environments with different N availability, the RNAi lines with down-regulated gliadins seem well suited for the production of wheat grain with low gliadin content.The Spanish Ministry of Economy and Competitiveness (Project AGL2016-80566-P) and the European Regional Development Fund (FEDER) supported this research

Grapholita molesta : characterization of an artificial rearing

Grapholita molesta (Busck) es considerada plaga principal del duraznero en Mendoza. Sus larvas han sido criadas, en condiciones de laboratorio, con dietas naturales por diversos autores. Los objetivos fueron: 1. poner a punto la cría artificial de la especie; 2. diseñar una jaula para el apareamiento y la oviposición de los adultos; 3. evaluar la eficiencia de la jaula y la dieta larvaria mediante grados día, ciclo biológico, peso de pupas, recuperación de huevoadulto, fecundidad, viabilidad y longevidad. La cría artificial de una especie constituye una herramienta para profundizar sus conocimientos bioetoecológicos y, en consecuencia, aplicarlos en su control. En 1996 se fundó una cría con larvas salvajes alimentadas con manzanas verdes pequeñas del cv. Granny Smith. Los adultos se desarrollaron en una jaula especialmente diseñada. En el ciclo biológico, la recuperación huevo-adulto y la fecundidad se obtuvieron valores superiores a los citados por otros autores pero no ocurrió lo mismo con las otras variables. La cría artificial de Grapholita molesta (Busck) se logró desarrollar por 37 generaciones y la alta fecundidad obtenida es una clave fundamental en el éxito de su mantenimiento.The Grapholita molesta (Busck) is considered the principal plague of peach trees in Mendoza. Its larva have been bred in laboratory conditions, with natural diets by different authors. The goals were: 1. to set the artificial breeding for this specie; 2. to design a cage for the mating and adult oviposition; 3. to evaluate the efficiency of the cage and larval diet by means of day egrees, biological cycle, pupae weight, egg-adult recovery, fertility, viability and longevity. The artificial rearing of a species constitutes a fundamental tool to obtain bioetoecological knowledge and in consequence apply it in its control. In 1996 offspring of wild larva which were fed small green Granny Smith apples were founded. The adults developed in a specially designed cage. In the biological cycle, egg-adult recovery and fertility superior values than those mentioned by other authors were obtained, but this didn't reoccur with the other variables. The artificial rearing of the Grapholita molesta (Busck) were able to develop for 37 generations, being the high fertility obtained a fundamental key in the success of their maintenance.Fil: Marín, María Susana. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Ciencias BiológicasFil: Sáez, César C.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Ciencias BiológicasFil: Caballero, Ariel E.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Ciencias BiológicasFil: Quercetti, María J.. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Departamento de Ciencias Biológica

Predatory potential of two functional groups of spiders on Philaenus spumarius

There is an urgent need of increasing the knowledge about natural enemies of Philaenus spumarius and finding strategies to limit the spread of X. fastidiosa. Generalist predators, such as spiders, can arise as potential natural control agents. Determining the functional response is crucial for understanding the potentiality of a predator as biological control agent. In this work, the functional response of two widespread palearctic spider species belonging to two different functional groups was assessed. The ambusher spider Synema globosum and the orb-weaver Araniella cucurbitina were used as model species and P. spumarius as prey under laboratory conditions. In parallel, Ceratitis capitata was also used as prey in order to compare the spiders´ predatory potential between a non-flying insect (P. spumarius) and a flying one (C. capitata). A. cucurbitina and S. globosum showed a type II and type I functional response respectively when fed with P. spumarius and a type II response when fed with C. capitata. Both the handling time and attack rate were significantly different between spider species when fed with P. spumarius (p<0.01) and between prey types for each spider functional group (p<0.01). The results suggest that S. globosum was more efficient capturing spittlebugs one by one than A. cucurbitina. On the contrary, A. cucurbitina was more efficient killing flies in webs than S. globosum.This work has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement N. 727987 “Xylella fastidiosa Active Containment Through a multidisciplinary-Oriented Research Strategy XF-ACTORS”.info:eu-repo/semantics/publishedVersio

Autoestima como variable psicosocial predictora de la actividad física en personas mayores

Suplemento de artículos seleccionados con revisión del Congreso Andaluz de Psicología de la Actividad Física y el Deporte (13 : 2011 : Sevilla). Editores : José Carlos Caracuel ; Rocío Bohórquez.The purpose of this study was to investigate the relationship between self-esteem expressed by people over 65 years of age and taking part in physical activity. Self-concept and self-esteem are psychologically fundamental components of quality of life in adulthood and well-being. Selfesteem has been proposed as an area of intervention to improve the quality of life in the senior population. The sample was composed of more than 184 people, 92 of whom took part in physical activity on a regular basis and another 92, who developed sedentary lifestyles. The results of the Rosenberg Self-Esteem Questionnaire applied to the sample showed different levels of self-esteem between seniors who are physically active and those who are not, with self-esteem being significantly higher in active seniors. Studies with similar objectives demonstrate and support the verification of the hypothesis that establishes a positive relationship between self-esteem and participation in physical activity

Solea solea: landings data and LPUE standardization from official logbooks in Atlantic Iberian waters

Time series of abundance indices are the main source of information to calibrate stock assessment models. Standardized LPUEs (Landings per unit effort) derived from fishery-dependent data can be used as a proxy of the species abundance. In this study we present a first attempt of standardization of landings per unit of effort (LPUE) for soleid species. Soleid species, in particular the common sole (Solea solea), are important fisheries resources with high economic value, targeted by the Spanish fleet in Iberian Atlantic waters. Nevertheless, information on these resources is scarce. Time series data from 2009 to 2020 from the official logbooks of the Spanish fleet operating in the ICES subdivisions 8.c and 9.a. have been analysed in order to provide some insights into this fishery. Uncertainties in the accuracy of the identification of the species led to the aggregation of 6 taxa: Solea solea, Solea senegalensis, Solea elongata, Solea spp., Pegusa lascaris and Pegusa cadenati, as one single category, being the common sole, Solea solea, the most important taxon in terms of economic value and landings. Landings per unit of effort (LPUE) based on the estimated soleid species landed weight by fishing days (unit effort), for the most important métiers in terms of landings, were used as response variable. Generalised linear mixed models, fitted with a Gamma distribution, were employed, and several explanatory variables were tested to be included in the models: year, quarter, month, ICES division, statistical rectangle, landing port, vessel characteristics (LOA category, vessel power), depth, fishing time and number of fishing operations

Influence of family-centered goals on dividend policy in family firms: A socioemotional wealth approach

Socioemotional wealth (SEW) preservation is likely to be a key determinant for family firms to shape their dividend policy. This paper analyzes how family-centered goals captured by SEW influence on dividend policy in private family firms, exploring as well the moderating role on these relationships of family involvement in management, generational stage, and firm hazard. Results indicate a negative association between SEW preservation and both the likelihood of giving dividends and the amount of dividend paid. This negative relationship is stronger when the CEO is a family member, in early generational stages and when the firm faces greater performance hazard. The amount of dividend paid is also lower when there are family members in other top management positions beyond the CEO. Thus, the evidence provided suggests that the existing heterogeneity regarding dividend policy in the context of privately held family firms is strongly driven by differences in SEW priorities

Socioemotional wealth and financial decisions in private family SMEs

This study focuses on heterogeneity in family firms by analyzing whether the non-economic aspects that meet the family?s affective needs, or socioemotional wealth (SEW), influence debt financing. In the context of private family small and medium-sized enterprises (SMEs), our results indicate that family firms which are more concerned about preserving their SEW have lower debt levels (total and financial debt) and that CEO gender plays an important moderating role, with female CEOs strengthening the negative effect of SEW preservation on debt financing. Moreover, when family firms are managed by the first generation, the SEW effect on financial debt is even more negative. The findings are consistent with SEW being the point of reference in family SMEs? financial decisions, and highlight the importance of the CEO and family generation in charge of the firm as moderators of the relationship between SEW preservation and debt financing

Tratamiento de la gonartrosis con osteotomía tibial de penetración y fijación con grapas

La osteotomía metafisaria proximal de tibia ha sido utilizada en el tratamiento de 96 gonartrosis con desviación axil en varo (87 casos) o en valgo (nueve casos), con componente de flexo en la mitad de los casos y con cierto grado de laxitud ligamentosa en 1/3 de los casos. Se utilizó un cálculo angular preoperatorio en bipedestación con contraste opaco del eje mecánico de la extremidad y Rx-TV. La osteotomía fue cuneiforme de penetración, se estabilizó con grapas y se aplicó calza de yeso para facilitar el apoyo precoz. Proporcionó un efecto antiálgico en el 94 % de los casos, pero la valoración funcional deja el resultado en 25 % de casos excelentes y 51% de casos buenos. Destacan la necesidad de operar ambas rodillas, la bondad del resultado con independencia del grado de angulación, la compensación de las laxitudes moderadas ya referidas y la repercusión favorable del realineamiento axil sobre la artrosis femoropatelar presente en el 75 % de los casos

Anorèxia nerviosa i pràctica d’exercici físic per perdre pes

A hores d’ara es reconeix i s’accepta que l’anorèxia nerviosa és un trastorn del comportament alimentari de naturalesa multicausal, que en els últims anys, a causa de la difusió dels mitjans de comunicació, les aportacions dels professionals, les associacions que hi lluiten en contra o els relats de les joves que han mort com a conseqüència de la malaltia, ha sensibilitzat l’opinió pública, política i comença a fer-ho amb l’educativa. La intenció amb què emprenem aquesta investigació és la d’estimar la prevalença de la població de risc per a anorèxia nerviosa en adolescents de tots dos sexes que cursen de 1r a 4t d’Educació Secundària Obligatòria, en centres docents, tant privats com a públics, i corroborar que l’exercici físic que practiquen els nostres i les nostres adolescents va encaminat, fonamentalment, a perdre pes