Saenger Theatre: for-profit arts organization

The following report describes the activities and outcomes of a fourteen-week internship in the fall of 2004 in the Marketing, Booking & Special Events and Group & Corporate Sales Departments of the Saenger Theatre. The first section contains an organizational profile. The second is a detailed description of the internship. The third section is an analysis of the internal and external problems within the organization. The fourth is an explanation of the Best Practices found within the organization and any recommendations for the resolution of challenges. The conclusion of the report contains a discussion of the short and long term effects of the intern\u27s contributions to the organization

Genetic Variability and Founder Effect in the Pitcher Plant Sarracenia purpurea (Sarraceniaceae) in Populations Introduced into Switzerland: from Inbreeding to Invasion

• Background and Aims The long-lived and mainly outcrossing species Sarracenia purpurea has been introduced into Switzerland and become invasive. This creates the opportunity to study reactions to founder effect and how a species can circumvent deleterious effects of bottlenecks such as reduced genetic diversity, inbreeding and extinction through mutational meltdown, to emerge as a highly invasive plant. • Methods A population genetic survey by random amplified polymorphism DNA markers (RAPD) together with historical insights and a field pollination experiment were carried out. • Key Results At the regional scale, S. purpurea shows low structure (θst = 0·072) due to a recent founder event and important subsequent growth. Nevertheless, multivariate statistical analyses reveal that, because of a bottleneck that shifted allele frequencies, most of the variability is independent among populations. In one population (Tenasses) the species has become invasive and genetic analysis reveals restricted gene flow and family structure (θst = 0·287). Although inbreeding appears to be high (Fis > 0·410 from a Bayesian estimation), a field pollination experiment failed to detect significant inbreeding depression upon F1 seed number and seed weight fitness-traits. Furthermore, crosses between unrelated individuals produced F1 seeds with significantly reduced fitness, thus showing local outbreeding depression. • Conclusions The results suggest that, under restricted gene flow among families, the species may not only have rapidly purged deleterious alleles, but also have undergone some form of selection for inbreeding due to co-adaptation between loc

La capacite de proliferation in vitro des rameaux frutieres et vegetatives chez Pyrus malus et Pyrus communis

Les tiges végétatives proliferent mieux que les frutieres, et pourtant les deux ont besoins nutritives semblables. Lage des tiges vegétatives na aucune influence sur la capacité de proliferation.Fil: Trippi, Victorio

Plant Senescence: a self induced process

This review suggests that plant senescence is a self-induced process. This proposition is based on changing relations among cells and organs in a growing system, originated by growth itself, and differentiation due to adaptation to internal and external environments conditions, which are also changing conditions during development. This succession of events has been called stressfunctions or emerged features. Among them are mentioned: growth in height restricting water supply to the most distal parts; the seed germination, modifying the relations with oxygen during the change from anaerobic metabolisms to an aerobic one; leaf growth and differentiation generating toxic hyperoxic conditions in autotrophic cells; the source-sink relations, inducing senescence in source organs by deficiency; sugar accumulation and growth regulators or hormones inducing oxidative process. The reactive oxygen species (ROS), generated under different stress condition, should be major modulators of growth and differentiation processes that became in senescence of both autotrophic organs, which are more sensitive to oxidative process and heterotrophic ones, which being more tolerant to oxidations assure specie perpetuation.Fil: Trippi, Victorio Segundo. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación en Ciencias Veterinarias y Agronómicas. Instituto de Fitopatología y Fisiología Vegetal; ArgentinaFil: Lascano, Hernan Ramiro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación en Ciencias Veterinarias y Agronómicas. Instituto de Fitopatología y Fisiología Vegetal; ArgentinaFil: Melchiorre, Mariana Noemi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación en Ciencias Veterinarias y Agronómicas. Instituto de Fitopatología y Fisiología Vegetal; Argentin

L'action des tissus adjacents sur la capacite de proliferation du cambium et l'activite de destruction d'aia et peroxidasique chez aesculus hippocastanum et castanea vulgaris

Fil: Trippi, Victorio

Senescencia foliar y su relación con el metabolismo oxidativo

En la presente comunicación se expone la investigación realizada sobre el tema mencionado, sus métodos y resultados.Academia Nacional de Agronomía y Veterinari

Senescencia foliar y su relación con el metabolismo oxidativo

En la presente comunicación se expone la investigación realizada sobre el tema mencionado, sus métodos y resultados.Academia Nacional de Agronomía y Veterinari

El envejecimiento de los clones

El envejecimiento de los clones se observa en plantas que muestran crecimiento definido por un determinismo genético, cuando se multiplican con tejidos que evolucionan hacia el crecimiento reproductivo. Las plantas fuertemente influenciadas por el ambiente, pueden mostrar fenómenos de senescencia cuando la condición de ambiente determina el crecimiento reproductivo. Los cambios asociados con la edad resultan de alteraciones del citoplasma como un tipo de diferenciación celular. Cambios que pueden ser revertidos a través de la reproducción sexual o mecanismos vegetativos naturales como la poliembrionia.Academia Nacional de Agronomía y Veterinaria (ANAV