Now showing items 9-28 of 71

    • Drought stress causes a reduction in the biosynthesis of ascorbic acid in soybean plants 

      Seminario Huárriz, Amaia Upna; Song, Li; Zulet González, Amaia Upna; Nguyen, Henry T.; González García, Esther Upna; Larrainzar Rodríguez, Estíbaliz Upna (Frontiers Media, 2017)   Artículo / Artikulua  OpenAccess
      Drought provokes a number of physiological changes in plants including oxidative damage. Ascorbic acid (AsA), also known as vitamin C, is one of the most abundant water-soluble antioxidant compound present in plant tissues. ...
    • Drought stress provokes the down-regulation of methionine and ethylene biosynthesis pathways in Medicago truncatula roots and nodules 

      Larrainzar Rodríguez, Estíbaliz Upna; Molenaar, Johanna A.; Wienkoop, Stefanie; Gil Quintana, Erena Upna; Alibert, Bénédicte; Limami, Anis M.; Arrese-Igor Sánchez, César Upna; González García, Esther Upna (Wiley, 2014)   Artículo / Artikulua  OpenAccess
      Symbiotic nitrogen fixation is one of the first physiological processes inhibited in legume plants under water-deficit conditions. Despite the progress made in the last decades, the molecular mechanisms behind this ...
    • Drought-induced changes in wood density are not prevented by thinning in Scots pine stands 

      Candel-Pérez, David Upna; Lo, Yueh-Hsin Upna; Blanco Vaca, Juan Antonio Upna; Chiu, Chih-Ming; Camarero, Jesús Julio; González de Andrés, Ester Upna; Imbert Rodríguez, Bosco Upna; Castillo Martínez, Federico Upna (MDPI, 2018)   Artículo / Artikulua  OpenAccess
      Density is an important wood mechanical property and an indicator of xylem architecture and hydraulic conductivity. It can be influenced by forest management and climate. We studied the impact of thinning and climate ...
    • El ecólogo en su laberinto 

      García-Fayos, P.; Bonet, F.J.; Valladares, Fernando; Traveset Vilagines, Anna; Pausas, J.G.; Imbert Rodríguez, Bosco Upna; Lloret, F (Asociación Española de Ecología Terrestre, 2008)   Artículo / Artikulua  OpenAccess
      El presente artículo pretende ser una contribución al debate sobre el papel de los ecólogos en la sociedad. El mismo es producto de la reflexión a partir de discusiones mantenidas a finales de junio de 2007 en Farrera y ...
    • Ecophysiological roles of abaxial anthocyanins in a perennial understorey herb from temperate deciduous forests 

      Fernández Marín, Beatriz; Esteban Terradillos, Raquel; Míguez, Fátima; Artetxe, Unai; Castañeda Presa, Verónica Upna; Pintó Marijuan, Marta; Becerril, José María; García Plazaola, José Ignacio (Oxford University Press, 2015)   Artículo / Artikulua  OpenAccess
      Accumulation of abaxial anthocyanins is an intriguing leaf trait particularly common among deeply shaded understorey plants of tropical and temperate forests whose ecological significance is still not properly understood. To ...
    • Effect of dietary quercetin and sphingomyelin on intestinal nutrient absorption and animal growth 

      Barrenetxe, Jaione; Aranguren Garacochea, Patricia Upna; Grijalba, A.; Martínez-Peñuela, J. M.; Marzo Pérez, Florencio Upna; Urdaneta, Elena (Cambridge University Press, 2006)   Artículo / Artikulua  OpenAccess
      Research on cancer and other conditions has shown flavonoids and sphingolipids to be food components capable of exerting chemoprotective action. Nevertheless, little is known about their effects on healthy individuals and ...
    • Effect of feeding regime on composting in bins 

      Storino, Francesco Upna; Menéndez Villanueva, Sergio Upna; Muro Erreguerena, Julio Upna; Aparicio Tejo, Pedro María Upna; Irigoyen Iriarte, Ignacio Upna (Taylor & Francis, 2017)   Artículo / Artikulua  OpenAccess
      Composting in bins is one of the most practical home composting methods. There is currently a need for greater information to improve the management of the composting process and to create home composting programs, which ...
    • Effect of insulin-like growth factor-I on nitrogen balance and intestinal galactose transport in rats with moderate liver cirrhosis 

      Núñez, Marina; Urdaneta, Elena; Santidrián, Santiago (Cambridge University Press, 2003)   Artículo / Artikulua  OpenAccess
      The malnutrition caused by liver cirrhosis (LC) often worsens the course of the disease. Patients affected by LC often have a low bioavailability of the anabolic liver peptide insulin-like growth factor (IGF)-I. The present ...
    • Effects of EPSPS Copy Number Variation (CNV) and glyphosate application on the aromatic and branched chain amino acid synthesis pathways in Amaranthus palmeri 

      Fernández Escalada, Manuel Upna; Zulet González, Ainhoa Upna; Gil Monreal, Miriam Upna; Zabalza Aznárez, Ana Upna; Ravet, Karl; Gaines, Todd; Royuela Hernando, Mercedes Upna (Frontiers Media, 2017)   Artículo / Artikulua  OpenAccess
      A key enzyme of the shikimate pathway, 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS; EC 2.5.1.19), is the known target of the widely used herbicide glyphosate. Glyphosate resistance in Amaranthus palmeri, one of ...
    • Effects of nitrogen deposition on carbon sequestration in Chinese fir forests ecosystems 

      Wei, Xiaohua; Blanco Vaca, Juan Antonio Upna; Jiang, Hong; Kimmins, J.P. (Hamish) (Elsevier, 2012)   Artículo / Artikulua  OpenAccess
      Nitrogen deposition and its ecologic effects on forest ecosystems have received global attention. In this paper, the ecosystem model FORECAST was used to assess the effects of nitrogen deposition on carbon sequestration ...
    • ¿Están los bosques mixtos pirenaicos de pino silvestre y haya en el camino hacia la saturación por nitrógeno? 

      Blanco Vaca, Juan Antonio Upna; San Emeterio Garciandía, Leticia Upna; González de Andrés, Ester Upna; Imbert Rodríguez, Bosco Upna; Larrainzar Rodríguez, Estíbaliz Upna; Peralta de Andrés, Francisco Javier Upna; Lo, Yueh-Hsin Upna; Castillo Martínez, Federico Upna (Asociación Española de Ecología Terrestre, 2017)   Artículo / Artikulua  OpenAccess
      Las actividades humanas causan altos niveles de deposición atmosférica crónica de N que pueden estar trastornando el ciclo del N en los bosques de los Pirineos occidentales. Para probar esta hipótesis, se han investigado ...
    • Evaluation of the effects of forest management strategies on carbon sequestration in evergreen broad-leaved (Phoebe bournei) plantation forests using FORECAST ecosystem model 

      Wang, Weifeng; Wei, Xiaohua; Liao, Weiming; Blanco Vaca, Juan Antonio Upna; Liu, Yuanqiu; Liu, Shirong; Liu, Guohua; Zhang, Lu; Guo, Xiaomin; Guo, Shengmao (Elsevier, 2013)   Artículo / Artikulua  OpenAccess
      In the context of global climate change, it is critical to study how different forest management practices affect forest carbon sequestration. This is especially important for forest managers and policy makers who will ...
    • Fat-to-glucose interconversion by hydrodynamic transfer of two glyoxylate cycle enzyme genes 

      Cordero, P.; Campión, J.; Milagro, F. I. Upna; Marzo Pérez, Florencio Upna; Martínez, J. A. (BioMed Central, 2008)   Artículo / Artikulua  OpenAccess
      The glyoxylate cycle, which is well characterized in higher plants and some microorganisms but not in vertebrates, is able to bypass the citric acid cycle to achieve fat-to-carbohydrate interconversion. In this context, ...
    • Fermentation and alternative oxidase contribute to the action of amino acid biosynthesis-inhibiting herbicides 

      Zulet González, Amaia Upna; Gil Monreal, Miriam Upna; Zabalza Aznárez, Ana Upna; Dongen, Joost T. van; Royuela Hernando, Mercedes Upna (Elsevier, 2015)   Artículo / Artikulua  OpenAccess
      Acetolactate synthase inhibitors (ALS-inhibitors) and glyphosate (GLP) are two classes of herbicide that act by the specific inhibition of an enzyme in the biosynthetic pathway of branched-chain or aromatic amino acids, ...
    • Fire in the woods or fire in the boiler: implementing rural district heating to reduce wildfire risks in the forest-urban interface 

      Blanco Vaca, Juan Antonio Upna; Dubois, David; Littlejohn, Dale; Flanders, David N.; Robinson, Peter; Moshofsky, Molly; Welham, Clive (ElsevierThe Institution of Chemical Engineers, 2015)   Artículo / Artikulua  OpenAccess
      Many rural communities in British Columbia (western Canada) are at risk from wildfire. This risk will increase over time as a result of climate change because of higher average temperatures, longer growing seasons, and ...
    • Forests may need centuries to recover their original productivity after continuous intensive management: an example from Douglas-fir stands 

      Blanco Vaca, Juan Antonio Upna (Elsevier, 2012)   Artículo / Artikulua  OpenAccess
      How long would it take for forests to recover their original productivity following continuous intensive management if they are left untouched? This issue was explored using the model FORECAST, calibrated and validated for ...
    • Gestión forestal sostenible de masas de pino silvestre en el Pirineo Navarro 

      Castillo Martínez, Federico Upna; Imbert Rodríguez, Bosco Upna; Blanco Vaca, Juan Antonio Upna; Traver, Carmen; Puertas, Fernando (Asociación Española de Econología Terrestre, 2003)   Artículo / Artikulua  OpenAccess
      La política forestal actual se caracteriza por un compromiso hacia una gestión ecológicamente sostenible de los ecosistemas forestales. Para poder realizarla es necesario conocer los factores que afectan al uso de los ...
    • Impacts of enhanced nitrogen deposition and soil acidification on biomass production and nitrogen leaching in Chinese fir plantations 

      Blanco Vaca, Juan Antonio Upna; Wei, Xiaohua; Jiang, Hong; Jie, Cheng-Yue; Xin, Zan-Hong (NRC Research Press, 2012)   Artículo / Artikulua  OpenAccess
      Atmospheric pollution levels in China are increasing quickly. Experience from other polluted regions shows that tree growth could be affected, but long-term effects of N deposition and soil acidification on Chinese forests ...
    • Impairment of carbon metabolism induced by the herbicide glyphosate 

      Orcaray Echeverría, Luis Upna; Zulet González, Amaia Upna; Zabalza Aznárez, Ana Upna; Royuela Hernando, Mercedes Upna (Elsevier, 2012)   Artículo / Artikulua  OpenAccess
      The herbicide glyphosate reduces plant growth and causes plant death by inhibiting the biosynthesis of aromatic amino acids. The objective of this work was to determine whether glyphosate-treated plants show a carbon ...
    • Importancia de la caracterización de la biomasa de raíces en la simulación de ecosistemas forestales 

      Gárate Bienzobas, Mikel; Blanco Vaca, Juan Antonio Upna (Asociación Española de Ecología Terrestre, 2013)   Artículo / Artikulua  OpenAccess
      Los análisis de sensibilidad son una herramienta importante para comprender el funcionamiento de los modelos ecológicos, así como para identificar los parámetros más importantes en su funcionamiento. Además, los análisis ...