Mediterranean Long Shelf-Life Landraces: An Untapped Genetic Resource for Tomato Improvement

[EN] The Mediterranean long shelf-life (LSL) tomatoes are a group of landraces with a fruit remaining sound up to 6¿12 months after harvest. Most have been selected under semi-arid Mediterranean summer conditions with poor irrigation or rain-fed and thus, are drought tolerant. Besides the convergence in the latter traits, local selection criteria have been very variable, leading to a wide variation in fruit morphology and quality traits. The different soil characteristics and agricultural management techniques across the Mediterranean denote also a wide range of plant adaptive traits to different conditions. Despite the notorious traits for fruit quality and environment adaptation, the LSL landraces have been poorly exploited in tomato breeding programs, which rely basically on wild tomato species. In this review, we describe most of the information currently available for Mediterranean LSL landraces in order to highlight the importance of this genetic resource. We focus on the origin and diversity, the main selective traits, and the determinants of the extended fruit shelf-life and the drought tolerance. Altogether, the Mediterranean LSL landraces are a very valuable heritage to be revalued, since constitutes an alternative source to improve fruit quality and shelf-life in tomato, and to breed for more resilient cultivars under the predicted climate change conditions.This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 727929 (TOMRES), No 634561 (TRADITOM) and No 679796 (TomGEM). Research has been also supported by the Spanish Ministry of Economy and Competitiveness (MINECO) project AGL2013-42364-R (TOMDRO), and the Government of the Balearic Islands grants BIA20/07, BIA07/08, BIA09/12 and AAEE56/2015. 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Birds and fishes in the knowledge of the settlers of the Atuel river coast in La Pampa, Argentina

La cuenca inferior del río Atuel en la provincia de La Pampa es el escenario de un proceso de desecamiento ocurrido progresivamente desde la instalación de las primeras poblaciones de colonos en la cuenca superior, pero la interrupción definitiva del escurrimiento ocurrió en 1948. A partir de ese año los pobladores asentados en la cuenca inferior sufrieron severas consecuencias que impactaron en su vida y en su cultura, tal como la interacción con los recursos naturales del entorno. La fauna constituye uno de los componentes ecosistémicos que intervienen en la cultura de las sociedades y le dan matices propios. El propósito de este trabajo es registrar los cambios diacrónicos ocurridos en los conocimientos sobre la ictiofauna y la avifauna asociada al río. Por medio de entrevistas abiertas a pobladores ribereños se indagó sobre sus conocimientos relacionados con la ictiofauna y la avifauna del lugar. Se indagó sobre los nombres comunes de peces y aves, así como los aspectos que hacen a la interacción y la percepción de los entrevistados sobre esos componentes del ecosistema. Esas actividades y conocimientos fueron cotejadas con las del pasado, recurriendo a la documentación histórica registrada en el área. La información obtenida establece un nivel de base actual que puede contribuir a facilitar las propuestas de acción que pudieran implementarse en las políticas públicas de desarrollo local.The lower basin of the Atuel river in La Pampa Province is the scene of a drying process that has occurred progressively since the settlement of the first colonist populations in the upper basin, whose definitive interruption of the flow occurred in 1948. Since that year, the settlers of the lower basin suffered severe consequences that impacted their lives and culture such as the interaction with the natural resources of the environment. The fauna constitutes one of the ecosystemic components that participates in the culture of societies and gives it its own nuances. Through open interviews with riverside residents, the aim of this work was to record the diachronic changes that happened in the settler’s knowledge about the fishes and birds associated with the river. The residents were asked about the common names of fishes and birds in the studies area, as well as about aspects related to the interviewees’ interaction and perception of these components of the ecosystem. Settler’s activities and knowledge were compared with past activities, using historical documentation recorded in the area. The information obtained establishes a current baseline that will facilitates action proposals that could be implemented in local development public policies.Instituto de Limnología "Dr. Raúl A. Ringuelet

Aves y peces en el conocimiento de los pobladores de la costa del río Atuel en La Pampa, Argentina

La cuenca inferior del río Atuel en la provincia de La Pampa es el escenario de un proceso de desecamiento ocurrido progresivamente desde la instalación de las primeras poblaciones de colonos en la cuenca superior, pero la interrupción definitiva del escurrimiento ocurrió en 1948. A partir de ese año los pobladores asentados en la cuenca inferior sufrieron severas consecuencias que impactaron en su vida y en su cultura, tal como la interacción con los recursos naturales del entorno. La fauna constituye uno de los componentes ecosistémicos que intervienen en la cultura de las sociedades y le dan matices propios. El propósito de este trabajo es registrar los cambios diacrónicos ocurridos en los conocimientos sobre la ictiofauna y la avifauna asociada al río. Por medio de entrevistas abiertas a pobladores ribereños se indagó sobre sus conocimientos relacionados con la ictiofauna y la avifauna del lugar. Se indagó sobre los nombres comunes de peces y aves, así como los aspectos que hacen a la interacción y la percepción de los entrevistados sobre esos componentes del ecosistema. Esas actividades y conocimientos fueron cotejadas con las del pasado, recurriendo a la documentación histórica registrada en el área. La información obtenida establece un nivel de base actual que puede contribuir a facilitar las propuestas de acción que pudieran implementarse en las políticas públicas de desarrollo local

Vps3 and Vps8 control integrin trafficking from early to recycling endosomes and regulate integrin-dependent functions

Recycling endosomes maintain plasma membrane homeostasis and are important for cell polarity, migration, and cytokinesis. Yet, the molecular machineries that drive endocytic recycling remain largely unclear. The CORVET complex is a multi-subunit tether required for fusion between early endosomes. Here we show that the CORVET-specific subunits Vps3 and Vps8 also regulate vesicular transport from early to recycling endosomes. Vps3 and Vps8 localise to Rab4-positive recycling vesicles and co-localise with the CHEVI complex on Rab11-positive recycling endosomes. Depletion of Vps3 or Vps8 does not affect transferrin recycling, but delays the delivery of internalised integrins to recycling endosomes and their subsequent return to the plasma membrane. Consequently, Vps3/8 depletion results in defects in integrin-dependent cell adhesion and spreading, focal adhesion formation, and cell migration. These data reveal a role for Vps3 and Vps8 in a specialised recycling pathway important for integrin trafficking

Lifestyle factors and visceral adipose tissue: Results from the PREDIMED-PLUS study

Background: Visceral adipose tissue (VAT) is a strong predictor of cardiometabolic health, and lifestyle factors may have a positive influence on VAT depot. This study aimed to assess the cross-sectional associations between baseline levels of physical activity (PA), sedentary behaviours (SB) and adherence to the Mediterranean diet (MedDiet) with VAT depot in older individuals with overweight/obesity and metabolic syndrome. Methods: Baseline data of the PREDIMED-Plus study including a sample of 1,231 Caucasian men and women aged 55-75 years were used. Levels of leisure-time PA (total, light, and moderate-to-vigorous, in METs·min/day) and SB (total and TV-viewing, in h/day) were evaluated using validated questionnaires. Adherence to the MedDiet was evaluated using a 17-item energy-restricted MedDiet (erMedDiet) screener. The chair-stand test was used to estimate the muscle strength. VAT depot was assessed with DXA-CoreScan. Multivariable adjusted linear regression models were used to evaluate the association between lifestyle factors and VAT. For the statistics we had used multiadjusted linear regression models. Results: Total leisure-time PA (100 METs·min/day: β -24.3g, -36.7;-11.9g), moderate-to-vigorous PA (β -27.8g, 95% CI -40.8;-14.8g), chair-stand test (repeat: β -11.5g, 95% CI -20.1;-2.93g) were inversely associated, and total SB (h/day: β 38.2g, 95% CI 14.7;61.7) positively associated with VAT. Light PA, TV-viewing time and adherence to an erMedDiet were not significantly associated with VAT. Conclusions: In older adults with overweigh/obesity and metabolic syndrome, greater PA, muscle strength, and lower total SB were associated with less VAT depot. In this study, adherence to an erMedDiet was not associated with lower VAT

Positively selected amino acid replacements within the RuBisCO enzyme of oak trees are associated with ecological adaptations

Phylogenetic analysis by maximum likelihood (PAML) has become the standard approach to study positive selection at the molecular level, but other methods may provide complementary ways to identify amino acid replacements associated with particular conditions. Here, we compare results of the decision tree (DT) model method with ones of PAML using the key photosynthetic enzyme RuBisCO as a model system to study molecular adaptation to particular ecological conditions in oaks (Quercus). We sequenced the chloroplast rbcL gene encoding RuBisCO large subunit in 158 Quercus species, covering about a third of the global genus diversity. It has been hypothesized that RuBisCO has evolved differentially depending on the environmental conditions and leaf traits governing internal gas diffusion patterns. Here, we show, using PAML, that amino acid replacements at the residue positions 95, 145, 251, 262 and 328 of the RuBisCO large subunit have been the subject of positive selection along particular Quercus lineages associated with the leaf traits and climate characteristics. In parallel, the DT model identified amino acid replacements at sites 95, 219, 262 and 328 being associated with the leaf traits and climate characteristics, exhibiting partial overlap with the results obtained using PAML

Long daytime napping is associated with increased adiposity and type 2 diabetes in an elderly population with metabolic syndrome

Research examining associations between objectively-measured napping time and type 2 diabetes (T2D) is lacking. This study aimed to evaluate daytime napping in relation to T2D and adiposity measures in elderly individuals from the Mediterranean region. A cross-sectional analysis of baseline data from 2190 elderly participants with overweight/obesity and metabolic syndrome, in the PREDIMED-Plus trial, was carried out. Accelerometer-derived napping was measured. Prevalence ratios (PR) and 95% confidence intervals (CI) for T2D were obtained using multivariable-adjusted Cox regression with constant time. Linear regression models were fitted to examine associations of napping with body mass index (BMI) and waist circumference (WC). Participants napping ≥90 min had a higher prevalence of T2D (PR 1.37 (1.06, 1.78)) compared with those napping 5 to <30 min per day. Significant positive associations with BMI and WC were found in those participants napping ≥30 min as compared to those napping 5 to <30 min per day. The findings of this study suggest that longer daytime napping is associated with higher T2D prevalence and greater adiposity measures in an elderly Spanish population at high cardiovascular risk

Isotemporal substitution of inactive time with physical activity and time in bed: cross-sectional associations with cardiometabolic health in the PREDIMEDPlus study

Background: This study explored the association between inactive time and measures of adiposity, clinical parameters, obesity, type 2 diabetes and metabolic syndrome components. It further examined the impact of reallocating inactive time to time in bed, light physical activity (LPA) or moderate-to-vigorous physical activity (MVPA) on cardio-metabolic risk factors, including measures of adiposity and body composition, biochemical parameters and blood pressure in older adults. Methods: This is a cross-sectional analysis of baseline data from 2189 Caucasian men and women (age 55-75 years, BMI 27-40 Kg/m2) from the PREDIMED-Plus study (http://www.predimedplus.com/). All participants had ≥3 components of the metabolic syndrome. Inactive time, physical activity and time in bed were objectively determined using triaxial accelerometers GENEActiv during 7 days (ActivInsights Ltd., Kimbolton, United Kingdom). Multiple adjusted linear and logistic regression models were used. Isotemporal substitution regression modelling was performed to assess the relationship of replacing the amount of time spent in one activity for another, on each outcome, including measures of adiposity and body composition, biochemical parameters and blood pressure in older adults. Results: Inactive time was associated with indicators of obesity and the metabolic syndrome. Reallocating 30 min per day of inactive time to 30 min per day of time in bed was associated with lower BMI, waist circumference and glycated hemoglobin (HbA1c) (all p-values < 0.05). Reallocating 30 min per day of inactive time with 30 min per day of LPA or MVPA was associated with lower BMI, waist circumference, total fat, visceral adipose tissue, HbA1c, glucose, triglycerides, and higher body muscle mass and HDL cholesterol (all p-values < 0.05). Conclusions: Inactive time was associated with a poor cardio-metabolic profile. Isotemporal substitution of inactive time with MVPA and LPA or time in bed could have beneficial impact on cardio-metabolic health