Person: Ben Mariem, Sinda
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Ben Mariem
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Sinda
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Ciencias
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0000-0003-2620-5453
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119639
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Publication Open Access Elevated CO2 has concurrent effects on leaf and grain metabolism but minimal effects on yield in wheat(Oxford University Press, 2020) Tcherkez, Guillaume; Ben Mariem, Sinda; Larraya Reta, Luis MarĆa; GarcĆa Mina, JosĆ© M.; ZamarreƱo, Ćngel M.; Paradela, Alberto; Cui, Jing; Badeck, Franz-Werner; Meza, Diego; Rizza, Fulvia; Bunce, James; Han, Xue; Tausz-Posch, Sabine; Cattivelli, Luigi; Fangmeier, Andreas; Aranjuelo Michelena, Iker; AgronomĆa, BiotecnologĆa y AlimentaciĆ³n; Agronomia, Bioteknologia eta Elikadura; Gobierno de Navarra / Nafarroako Gobernua, PI040 TRIGOCLIMWhile the general effect of CO2 enrichment on photosynthesis, stomatal conductance, N content, and yield has been documented, there is still some uncertainty as to whether there are interactive effects between CO2 enrichment and other factors, such as temperature, geographical location, water availability, and cultivar. In addition, the metabolic coordination between leaves and grains, which is crucial for crop responsiveness to elevated CO2, has never been examined closely. Here, we address these two aspects by multi-level analyses of data from several free-air CO2 enrichment experiments conducted in five different countries. There was little effect of elevated CO2 on yield (except in the USA), likely due to photosynthetic capacity acclimation, as reflected by protein profiles. In addition, there was a significant decrease in leaf amino acids (threonine) and macroelements (e.g. K) at elevated CO2, while other elements, such as Mg or S, increased. Despite the non-significant effect of CO2 enrichment on yield, grains appeared to be significantly depleted in N (as expected), but also in threonine, the S-containing amino acid methionine, and Mg. Overall, our results suggest a strong detrimental effect of CO2 enrichment on nutrient availability and remobilization from leaves to grains.Publication Open Access Carbon/nitrogen relations in C3 cereal crops within a climate change context: implications on grain yield and quality(2021) Ben Mariem, Sinda; Aranjuelo Michelena, Iker; Morales Iribas, FermĆn; Arrese-Igor SĆ”nchez, CĆ©sar; Ciencias; Zientziak; Gobierno de Navarra / Nafarroako GobernuaEl objetivo principal de este trabajo es el uso de la aplicaciĆ³n de nuevos criterios de selecciĆ³n de trigo para identificar, de manera integradora, genotipos y prĆ”cticas de manejo de cultivos que confieran alta eficiencia en el uso de nitrĆ³geno para alcanzar mayor rendimiento y mejor calidad de grano en condiciones ambientales cambiantes ([CO2] elevado y baja disponibilidad de agua).Publication Open Access Photosynthetic metabolism under stressful growth conditions as a bases for crop breeding and yield improvement(MDPI, 2020) Morales Iribas, FermĆn; AncĆn RĆpodas, MarĆa; Fakhet, Dorra; GonzĆ”lez Torralba, Jon; GĆ”mez GuzmĆ”n, Angie Lorena; Seminario HuĆ”rriz, Amaia; Soba Hidalgo, David; Ben Mariem, Sinda; Garriga, Miguel; Aranjuelo Michelena, Iker; Agronomia, Bioteknologia eta Elikadura; Institute for Multidisciplinary Research in Applied Biology - IMAB; AgronomĆa, BiotecnologĆa y AlimentaciĆ³nIncreased periods of water shortage and higher temperatures, together with a reduction in nutrient availability, have been proposed as major factors that negatively impact plant development. Photosynthetic CO2 assimilation is the basis of crop production for animal and human food, and for this reason, it has been selected as a primary target for crop phenotyping/breeding studies. Within this context, knowledge of the mechanisms involved in the response and acclimation of photosynthetic CO2 assimilation to multiple changing environmental conditions (including nutrients, water availability, and rising temperature) is a matter of great concern for the understanding of plant behavior under stress conditions, and for the development of new strategies and tools for enhancing plant growth in the future. The current review aims to analyze, from a multi-perspective approach (ranging across breeding, gas exchange, genomics, etc.) the impact of changing environmental conditions on the performance of the photosynthetic apparatus and, consequently, plant growth.Publication Open Access Carbohydrate and amino acid dynamics during grain growth in four temperate cereals under well-watered and water-limited regimes(MDPI, 2021) MĆ©ndez-Espinoza, Ana MarĆa; Garriga, Miguel; Ben Mariem, Sinda; Soba Hidalgo, David; Aranjuelo Michelena, Iker; Pozo, Alejandro del; Ciencias; ZientziakGrain development in cereals depends on synthesis and remobilisation compounds such as water-soluble carbohydrates (WSCs), amino acids (AAs), minerals and environmental conditions during pre-and post-anthesis. This study analyses the impact of water stress on metabolite (WSCs, AAs and nitrogen) dynamics between the source (leaves and stems) and sink (grain) organs in triticale, bread wheat, durum wheat and barley. Plants were grown in glasshouse conditions under well-watered (WW) and water-limited (WL) regimes (from flag leaf fully expanded until maturity). The results showed that the stem WSC content and the apparent mobilisation of WSC to the grain were much higher in triticale and were associated with its larger grain size and grain number. In the four cereals, grain weight and the number of kernels per spike were positively associated with stem WSC mobilisation. After anthesis, the AA concentration in leaves was much lower than in the grain. In grain, the main AAs in terms of concentration were Asn, Pro and Gln in triticale, bread, and durum wheat, and Asn, Pro and Val in barley. The water-limited regime reduced grain weight per plant in the four cereal species, but it had no clear effects on WSC content and AAs in leaves and grain. In general, triticale was less affected by WL than the other cereals.