81 research outputs found
The kiwi of all skinks: an unusual egg size in a species of Madascincus (Squamata: Scincidae) from eastern Madagascar
info:eu-repo/semantics/publishedVersio
Overexpression of BvHb2, a Class 2 Non-Symbiotic Hemoglobin from Sugar Beet, Confers Drought-Induced Withering Resistance and Alters Iron Content in Tomato
Drought stress is one of the major threats to agriculture and concomitantly to food production. Tomato is one of the most important industrial crops, but its tolerance to water scarcity is very low. Traditional plant breeding has a limited margin to minimize this water requirement. In order to design novel biotechnological approaches to cope with this problem, we have screened a plant cDNA library from the halotolerant crop sugar beet (Beta vulgaris L.) for genes able to confer drought/osmotic stress tolerance to the yeast model system upon overexpression. We have identified the gene that encodes BvHb2, a class 2 non-symbiotic hemoglobin, which is present as a single copy in the sugar beet genome, expressed mainly in leaves and regulated by light and abiotic stress. We have evaluated its biotechnological potential in the model plant Arabidopsis thaliana and found that BvHb2 is able to confer drought and osmotic stress tolerance. We also generated transgenic lines of tomato (Solanum lycopersicum) overexpressing BvHb2 and found that the resulting plants are more resistant to drought-induce withering. In addition, transgenic lines overexpressing BvHb2 exhibit increased levels of iron content in leaves. Here, we show that class 2 non-symbiotic plant hemoglobins are targets to generate novel biotechnological crops tolerant to abiotic stress. The fact that these proteins are conserved in plants opens the possibility for using Non-GMO approaches, such as classical breeding, molecular breeding, or novel breeding techniques to increase drought tolerance using this protein as a target.</jats:p
Involvement of plant endogenous ABA in Bacillus megaterium PGPR activity in tomato plants
BACKGROUND: Plant growth-promoting rhizobacteria (PGPR) are naturally occurring soil bacteria which benefit plants by improving plant productivity and immunity. The mechanisms involved in these processes include the regulation of plant hormone levels such as ethylene and abscisic acid (ABA). The aim of the present study was to determine whether the activity of Bacillus megaterium PGPR is affected by the endogenous ABA content of the host plant. The ABA-deficient tomato mutants flacca and sitiens and their near-isogenic wild-type parental lines were used. Growth, stomatal conductance, shoot hormone concentration, competition assay for colonization of tomato root tips, and root expression of plant genes expected to be modulated by ABA and PGPR were examined.
RESULTS: Contrary to the wild-type plants in which PGPR stimulated growth rates, PGPR caused growth inhibition in ABA-deficient mutant plants. PGPR also triggered an over accumulation of ethylene in ABA-deficient plants which correlated with a higher expression of the pathogenesis-related gene Sl-PR1b.
CONCLUSIONS: Positive correlation between over-accumulation of ethylene and a higher expression of Sl-PR1b in ABA-deficient mutant plants could indicate that maintenance of normal plant endogenous ABA content may be essential for the growth promoting action of B. megaterium by keeping low levels of ethylene production
InclusiĂłn Social
La SecretarĂa de Asuntos Estudiantiles (SAE) de la Universidad Nacional de CĂłrdoba se propone en este proyecto brindar las herramientas necesarias para garantizar a la sociedad en general el acceso a la educaciĂłn superior. Mediante los distintos ejes del proyecto, la SAE pretende acompañar a quienes estudian a lo largo de su vida universitaria, y mejorar los Ăndices de ingreso, permanencia y egreso de la UNC.Fil: González, Milagros. Universidad Nacional de CĂłrdoba. SecretarĂa de Asuntos Estudiantiles, Argentina.Fil: Clark, Carmen Gloria. Universidad Nacional de CĂłrdoba. SecretarĂa de Asuntos Estudiantiles, Argentina.Fil: Funes, Francisco Daniel . Universidad Nacional de CĂłrdoba. SecretarĂa de Asuntos Estudiantiles, Argentina.Fil: De Peralta, Sergio Porcel. Universidad Nacional de CĂłrdoba. SecretarĂa de Asuntos Estudiantiles, Argentina.Fil: MartĂnez, Rosa Marcela. Universidad Nacional de CĂłrdoba. SecretarĂa de Asuntos Estudiantiles, Argentina.Fil: Archilla, Victoria Candela. Universidad Nacional de CĂłrdoba. SecretarĂa de Asuntos Estudiantiles, Argentina.Fil: Hernández, Ricardo MatĂas . Universidad Nacional de CĂłrdoba. SecretarĂa de Asuntos Estudiantiles, Argentina.Fil: Laumann, Camila. Universidad Nacional de CĂłrdoba. SecretarĂa de Asuntos Estudiantiles, Argentina.Fil: Rosso, Maira. Universidad Nacional de CĂłrdoba. SecretarĂa de Asuntos Estudiantiles, Argentina.Fil: Zurita, Vanina Elizabeth. Universidad Nacional de CĂłrdoba. SecretarĂa de Asuntos Estudiantiles, Argentina.Fil: Stabile, Carmen Alicia. Universidad Nacional de CĂłrdoba. SecretarĂa de Asuntos Estudiantiles, Argentina
Saúde ambiental de parques espanhóis: Abordagem ao potencial alergénico dos espaços verdes urbanos
Los parques urbanos son elementos de la infraestructura verde que deben contribuir a mejorar la calidad de vida y el bienestar ciudadano. En este trabajo se presentan los resultados de la aplicaciĂłn de un novedoso Ăndice que estima la alergenicidad potencial de las zonas verdes urbanas. Este Ăndice, que contempla parámetros biolĂłgicos y biomĂ©tricos intrĂnsecos a las especies arbĂłreas existentes en los parques, genera un resultado cuyo valor está comprendido entre 0 y 1 segĂşn el potencial alergĂ©nico del parque sea nulo o de riesgo alto para la poblaciĂłn. En una primera fase el Ăndice se ha aplicado a parques de diferente tipologĂa, diseño, tamaño, riqueza especĂfica y biodiversidad ubicados en 20 ciudades españolas. Los resultados han mostrado que algunos de los parques estudiados registran un valor de Ăndice superior a 0,30, umbral suficiente para causar sĂntomas de alergia a la poblaciĂłn expuesta, y por tanto, de riesgo moderado o alto. Por el contrario, en la mayorĂa de los parques se obtuvo un valor inferior a este umbral. TambiĂ©n es posible conocer cuáles son las especies que más contribuyen al valor resultante, que son aquellas con estrategia de polinizaciĂłn anemĂłfila, periodos de floraciĂłn extensos y alta alergenicidad referenciada. Estos requisitos los cumplen todas las especies de las familias Betuláceas, Cupresáceas y Moráceas, y en menor extensiĂłn, Oleáceas y Platanáceas. Puede concluirse que el desarrollo de un Ăndice de estimaciĂłn de alergenicidad de espacios verdes urbanos constituye una herramienta de utilidad para minimizar el impacto de la alergia polĂnica en la poblaciĂłn.Urban parks are green infrastructure elements that should contribute to improving the quality of life and well-being of citizens. In this work there are presented the results of applying a new index to estimate the potential allergenicity of parks located in 20 Spanish cities. This index, which considers intrinsic biological and biometric parameters of existing plant species in parks, allows the allergenic risk thereof to be calculated on a scale ranging from 0 to 1, depending on whether to the park’s allergenicity is zero or has a high risk for the population. The parks selected for this study have different typologies, sizes, species richness and biodiversities, which has yielded highly variable index values. Almost half of the analysed parks have an index value higher than 0.30, a threshold considered having a moderate to high risk, and therefore, enough to cause allergy symptoms in the population. Conversely, most of the parks had an index value below this threshold, so that the risk of suffering allergies is low or very low. The formula also allows the species that most contribute to the resulting value for allergenicity to be known, which are those having an anemophillous strategy of pollination, extended periods of flowering, and a referenced high allergenicity. These requirements are met by all species of the Betulaceae, Cupressaceae and Moraceae families, and to a lesser extent by Oleaceae and Platanaceae. It can be concluded that the development of an index to estimate the allergenicity of urban green spaces constitutes a useful tool to minimize the impact of pollen allergy on the population.Os parques urbanos sĂŁo elementos da infraestrutura verde que devem contribuir para a melhoria da qualidade de vida dos cidadĂŁos. Neste trabalho apresentam-se os resultados da aplicação de um Ăndice inovador, que permite estimar a alergenicidade potencial dos espaços verdes urbanos. Este Ăndice, que inclui parâmetros biolĂłgicos e biomĂ©tricos, intrĂnsecos Ă s prĂłprias espĂ©cies existentes nos parques, tem como resultado um valor numa escala entre 0 e 1, de acordo com o potencial alergĂ©nico do parque, caso este seja, respetivamente e nos seus extremos, nulo ou de máximo risco para as populações. O Ăndice foi aplicado em parques de diferentes tipologias, desenho, tamanho, riqueza especĂfica e biodiversidade, situados em 20 cidades espanholas. Os resultados demonstram que alguns dos parques estudados registam um valor de Ăndice superior a 0,30, limite suficiente para causar sintomas de alergia na população exposta, e por tanto, risco moderado a alto. No entanto, a maioria dos parques apresenta um valor inferior a este limite. TambĂ©m Ă© possĂvel conhecer quais as espĂ©cies que mais contribuem para o valor do Ăndice, que correspondem aquelas com a estratĂ©gia de polinização anemĂłfila, perĂodos de floração extensos e potencial alergĂ©nico referenciado. Estes requisitos sĂŁo aplicáveis a todas as espĂ©cies das famĂlias Betuláceas, Cupressáceas e Moráceas, e em menor medida, Oleáceas e Platanáceas. Pode assim concluir-se que a aplicação de um Ăndice de previsĂŁo dos nĂveis de alergenicidade dos espaços verdes urbanos constitui uma ferramenta Ăştil para minimizar o impacto da alergia polĂnica sobre a população.peerReviewe
Saúde ambiental de parques espanhóis: Abordagem ao potencial alergénico dos espaços verdes urbanos
Urban parks are green infrastructure elements that should contribute to improving the quality of life and well-being of citizens. In this work there are presented the results of applying a new index to estimate the potential allergenicity of parks located in 20 Spanish cities. This index, which considers intrinsic biological and biometric parameters of existing plant species in parks, allows the allergenic risk thereof to be calculated on a scale ranging from 0 to 1, depending on whether to the park’s allergenicity is zero or has a high risk for the population. The parks selected for this study have different typologies, sizes, species richness and biodiversities, which has yielded highly variable index values. Almost half of the analysed parks have an index value higher than 0.30, a threshold considered having a moderate to high risk, and therefore, enough to cause allergy symptoms in the population. Conversely, most of the parks had an index value below this threshold, so that the risk of suffering allergies is low or very low. The formula also allows the species that most contribute to the resulting value for allergenicity to be known, which are those having an anemophilous strategy of pollination, extended periods of flowering, and a referenced high allergenicity. These requirements are met by all species of the Betulaceae, Cupressaceae and Moraceae families, and to a lesser extent by Oleaceae and Platanaceae. It can be concluded that the development of an index to estimate the allergenicity of urban green spaces constitutes a useful tool to minimize the impact of pollen allergy on the population.Los parques urbanos son elementos de la infraestructura verde que deben contribuir a mejorar la calidad de vida y el bienestar ciudadano. En este trabajo se presentan los resultados de la aplicaciĂłn de un novedoso Ăndice que estima la alergenicidad potencial de las zonas verdes urbanas. Este Ăndice, que contempla parámetros biolĂłgicos y biomĂ©tricos intrĂnsecos a las especies arbĂłreas existentes en los parques, genera un resultado cuyo valor está comprendido entre 0 y 1 segĂşn el potencial alergĂ©nico del parque sea nulo o de riesgo alto para la poblaciĂłn. En una primera fase el Ăndice se ha aplicado a parques de diferente tipologĂa, diseño, tamaño, riqueza especĂfica y biodiversidad ubicados en 20 ciudades españolas. Los resultados han mostrado que algunos de los parques estudiados registran un valor de Ăndice superior a 0.30, umbral suficiente para causar sĂntomas de alergia a la poblaciĂłn expuesta, y por tanto, de riesgo moderado o alto. Por el contrario, en la mayorĂa de los parques se obtuvo un valor inferior a este umbral. TambiĂ©n es posible conocer cuáles son las especies que más contribuyen al valor resultante, que son aquellas con estrategia de polinizaciĂłn anemĂłfila, periodos de oraciĂłn extensos y alta alergenicidad referenciada. Estos requisitos los cumplen todas las especies de las familias Betuláceas, Cupresáceas y Moráceas, y en menor extensiĂłn, Oleáceas y Platanáceas. Puede concluirse que el desarrollo de un Ăndice de estimaciĂłn de alergenicidad de espacios verdes urbanos constituye una herramienta de utilidad para minimizar el impacto de la alergia polĂnica en la poblaciĂłn.Os parques urbanos sĂŁo elementos da infraestrutura verde que devem contribuir para a melhoria da qualidade de vida dos cidadĂŁos. Neste trabalho apresentam-se os resultados da aplicação de um Ăndice inovador, que permite estimar a alergenicidade potencial dos espaços verdes urbanos. Este Ăndice, que inclui parâmetros biolĂłgicos e biomĂ©tricos, intrĂnsecos Ă s prĂłprias espĂ©cies existentes nos parques, tem como resultado um valor numa escala entre 0 e 1, de acordo com o potencial alergĂ©nico do parque, caso este seja, respetivamente e nos seus extremos, nulo ou de máximo risco para as populações. O Ăndice foi aplicado em parques de diferentes tipologias, desenho, tamanho, riqueza especĂfica e biodiversidade, situados em 20 cidades espanholas. Os resultados demonstram que alguns dos parques estudados registam um valor de Ăndice superior a 0.30, limite su ciente para causar sintomas de alergia na população exposta, e por tanto, risco moderado a alto. No entanto, a maioria dos parques apresenta um valor inferior a este limite. TambĂ©m Ă© possĂvel conhecer quais as espĂ©cies que mais contribuem para o valor do Ăndice, que correspondem aquelas com a estratĂ©gia de polinização anemĂłfila, perĂodos de oração extensos e potencial alergĂ©nico referenciado. Estes requisitos sĂŁo aplicáveis a todas as espĂ©cies das famĂlias Betuláceas, Cupressáceas e Moráceas, e em menor medida, Oleáceas e Platanáceas. Pode assim concluir-se que a aplicação de um Ăndice de previsĂŁo dos nĂveis de alergenicidade dos espaços verdes urbanos constitui uma ferramenta Ăştil para minimizar o impacto da alergia polĂnica sobre a população
Environmental health of Spanish parks: An approach to the allergenic potential of urban green spaces
Los parques urbanos son elementos de la infraestructura verde que deben contribuir a mejorar la calidad de vida y el bienestar
ciudadano. En este trabajo se presentan los resultados de la aplicaciĂłn de un novedoso Ăndice que estima la alergenicidad potencial
de las zonas verdes urbanas. Este Ăndice, que contempla parámetros biolĂłgicos y biomĂ©tricos intrĂnsecos a las especies arbĂłreas
existentes en los parques, genera un resultado cuyo valor está comprendido entre 0 y 1 según el potencial alergénico del parque
sea nulo o de riesgo alto para la poblaciĂłn. En una primera fase el Ăndice se ha aplicado a parques de diferente tipologĂa, diseño,
tamaño, riqueza especĂfica y biodiversidad ubicados en 20 ciudades españolas. Los resultados han mostrado que algunos de los
parques estudiados registran un valor de Ăndice superior a 0,30, umbral suficiente para causar sĂntomas de alergia a la poblaciĂłn
expuesta, y por tanto, de riesgo moderado o alto. Por el contrario, en la mayorĂa de los parques se obtuvo un valor inferior a este
umbral. También es posible conocer cuáles son las especies que más contribuyen al valor resultante, que son aquellas con estrategia
de polinizaciĂłn anemĂłfila, periodos de floraciĂłn extensos y alta alergenicidad referenciada. Estos requisitos los cumplen todas las
especies de las familias Betuláceas, Cupresáceas y Moráceas, y en menor extensión, Oleáceas y Platanáceas. Puede concluirse que
el desarrollo de un Ăndice de estimaciĂłn de alergenicidad de espacios verdes urbanos constituye una herramienta de utilidad para
minimizar el impacto de la alergia polĂnica en la poblaciĂłn.Urban parks are green infrastructure elements that should contribute to improving the quality of life and well-being of citizens.
In this work there are presented the results of applying a new index to estimate the potential allergenicity of parks located in 20
Spanish cities. This index, which considers intrinsic biological and biometric parameters of existing plant species in parks, allows
the allergenic risk thereof to be calculated on a scale ranging from 0 to 1, depending on whether to the park’s allergenicity is
zero or has a high risk for the population. The parks selected for this study have different typologies, sizes, species richness and
biodiversities, which has yielded highly variable index values. Almost half of the analysed parks have an index value higher than
0.30, a threshold considered having a moderate to high risk, and therefore, enough to cause allergy symptoms in the population.
Conversely, most of the parks had an index value below this threshold, so that the risk of suffering allergies is low or very low. The
formula also allows the species that most contribute to the resulting value for allergenicity to be known, which are those having
an anemophillous strategy of pollination, extended periods of flowering, and a referenced high allergenicity. These requirements
are met by all species of the Betulaceae, Cupressaceae and Moraceae families, and to a lesser extent by Oleaceae and Platanaceae.
It can be concluded that the development of an index to estimate the allergenicity of urban green spaces constitutes a useful tool
to minimize the impact of pollen allergy on the population.Os parques urbanos sĂŁo elementos da infraestrutura verde que devem contribuir para a melhoria da qualidade de vida dos
cidadĂŁos. Neste trabalho apresentam-se os resultados da aplicação de um Ăndice inovador, que permite estimar a alergenicidade
potencial dos espaços verdes urbanos. Este Ăndice, que inclui parâmetros biolĂłgicos e biomĂ©tricos, intrĂnsecos Ă s prĂłprias espĂ©cies
existentes nos parques, tem como resultado um valor numa escala entre 0 e 1, de acordo com o potencial alergénico do parque,
caso este seja, respetivamente e nos seus extremos, nulo ou de máximo risco para as populações. O Ăndice foi aplicado em parques
de diferentes tipologias, desenho, tamanho, riqueza especĂfica e biodiversidade, situados em 20 cidades espanholas. Os resultados
demonstram que alguns dos parques estudados registam um valor de Ăndice superior a 0,30, limite suficiente para causar sintomas
de alergia na população exposta, e por tanto, risco moderado a alto. No entanto, a maioria dos parques apresenta um valor inferior a
este limite. TambĂ©m Ă© possĂvel conhecer quais as espĂ©cies que mais contribuem para o valor do Ăndice, que correspondem aquelas
com a estratĂ©gia de polinização anemĂłfila, perĂodos de floração extensos e potencial alergĂ©nico referenciado. Estes requisitos sĂŁo
aplicáveis a todas as espĂ©cies das famĂlias Betuláceas, Cupressáceas e Moráceas, e em menor medida, Oleáceas e Platanáceas. Pode
assim concluir-se que a aplicação de um Ăndice de previsĂŁo dos nĂveis de alergenicidade dos espaços verdes urbanos constitui uma
ferramenta Ăştil para minimizar o impacto da alergia polĂnica sobre a população.S
Using global team science to identify genetic parkinson's disease worldwide.
No abstract available
Elective cancer surgery in COVID-19-free surgical pathways during the SARS-CoV-2 pandemic: An international, multicenter, comparative cohort study
PURPOSE As cancer surgery restarts after the first COVID-19 wave, health care providers urgently require data to determine where elective surgery is best performed. This study aimed to determine whether COVID-19–free surgical pathways were associated with lower postoperative pulmonary complication rates compared with hospitals with no defined pathway. PATIENTS AND METHODS This international, multicenter cohort study included patients who underwent elective surgery for 10 solid cancer types without preoperative suspicion of SARS-CoV-2. Participating hospitals included patients from local emergence of SARS-CoV-2 until April 19, 2020. At the time of surgery, hospitals were defined as having a COVID-19–free surgical pathway (complete segregation of the operating theater, critical care, and inpatient ward areas) or no defined pathway (incomplete or no segregation, areas shared with patients with COVID-19). The primary outcome was 30-day postoperative pulmonary complications (pneumonia, acute respiratory distress syndrome, unexpected ventilation). RESULTS Of 9,171 patients from 447 hospitals in 55 countries, 2,481 were operated on in COVID-19–free surgical pathways. Patients who underwent surgery within COVID-19–free surgical pathways were younger with fewer comorbidities than those in hospitals with no defined pathway but with similar proportions of major surgery. After adjustment, pulmonary complication rates were lower with COVID-19–free surgical pathways (2.2% v 4.9%; adjusted odds ratio [aOR], 0.62; 95% CI, 0.44 to 0.86). This was consistent in sensitivity analyses for low-risk patients (American Society of Anesthesiologists grade 1/2), propensity score–matched models, and patients with negative SARS-CoV-2 preoperative tests. The postoperative SARS-CoV-2 infection rate was also lower in COVID-19–free surgical pathways (2.1% v 3.6%; aOR, 0.53; 95% CI, 0.36 to 0.76). CONCLUSION Within available resources, dedicated COVID-19–free surgical pathways should be established to provide safe elective cancer surgery during current and before future SARS-CoV-2 outbreaks
Elective Cancer Surgery in COVID-19-Free Surgical Pathways During the SARS-CoV-2 Pandemic: An International, Multicenter, Comparative Cohort Study.
PURPOSE: As cancer surgery restarts after the first COVID-19 wave, health care providers urgently require data to determine where elective surgery is best performed. This study aimed to determine whether COVID-19-free surgical pathways were associated with lower postoperative pulmonary complication rates compared with hospitals with no defined pathway. PATIENTS AND METHODS: This international, multicenter cohort study included patients who underwent elective surgery for 10 solid cancer types without preoperative suspicion of SARS-CoV-2. Participating hospitals included patients from local emergence of SARS-CoV-2 until April 19, 2020. At the time of surgery, hospitals were defined as having a COVID-19-free surgical pathway (complete segregation of the operating theater, critical care, and inpatient ward areas) or no defined pathway (incomplete or no segregation, areas shared with patients with COVID-19). The primary outcome was 30-day postoperative pulmonary complications (pneumonia, acute respiratory distress syndrome, unexpected ventilation). RESULTS: Of 9,171 patients from 447 hospitals in 55 countries, 2,481 were operated on in COVID-19-free surgical pathways. Patients who underwent surgery within COVID-19-free surgical pathways were younger with fewer comorbidities than those in hospitals with no defined pathway but with similar proportions of major surgery. After adjustment, pulmonary complication rates were lower with COVID-19-free surgical pathways (2.2% v 4.9%; adjusted odds ratio [aOR], 0.62; 95% CI, 0.44 to 0.86). This was consistent in sensitivity analyses for low-risk patients (American Society of Anesthesiologists grade 1/2), propensity score-matched models, and patients with negative SARS-CoV-2 preoperative tests. The postoperative SARS-CoV-2 infection rate was also lower in COVID-19-free surgical pathways (2.1% v 3.6%; aOR, 0.53; 95% CI, 0.36 to 0.76). CONCLUSION: Within available resources, dedicated COVID-19-free surgical pathways should be established to provide safe elective cancer surgery during current and before future SARS-CoV-2 outbreaks
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