Ben Mariem, Sinda
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Ben Mariem
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Sinda
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Ciencias
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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, Fermín; Arrese-Igor Sánchez, César; Ciencias; Zientziak; Gobierno de Navarra / Nafarroako GobernuaEl objetivo principal de este trabajo es el uso de la aplicación de nuevos criterios de selección de trigo para identificar, de manera integradora, genotipos y prácticas de manejo de cultivos que confieran alta eficiencia en el uso de nitrógeno para alcanzar mayor rendimiento y mejor calidad de grano en condiciones ambientales cambiantes ([CO2] elevado y baja disponibilidad de agua).Publication Open Access Carbohydrate and amino acid dynamics during grain growth in four temperate cereals under well-watered and water-limited regimes(MDPI, 2021) Méndez-Espinoza, Ana María; 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.