المؤلفون: Alessandro Masoni, Iduna Arduini, Marco Mariotti, Laura Ercoli

المصدر: Cereal Research Communications. 38:294-303

مصطلحات موضوعية: Mediterranean climate, Physiology, Crop yield, durum wheat, food and beverages, Plant physiology, chemistry.chemical_element, Photosynthesis, Nitrogen, remobilization, Anthesis, Agronomy, chemistry, Productivity (ecology), Genetics, Dry matter, Agronomy and Crop Science

الوصف: Durum wheat (Triticum turgidum L. var. durum Desf.) is commonly grown in Mediterranean conditions, where temperature stress during grain filling can limit productivity. This research was performed to evaluate the effect of temperature during grain filling on dry matter and nitrogen dynamics in two Italian durum wheat varieties, Appio and Creso, grown with different nitrogen availabilities. The experiment compared two different temperature regimens, one within the normal range occurring during grain filling in Central Italy, the other within the normal range occurring in the southern regions of Italy (20/15 °C and 28/23 °C day/night, respectively). Plants were grown in pots outdoor until anthesis and afterward were placed in growth chambers. Results showed that nitrogen fertilization and post-anthesis temperature affected growth, accumulation and partitioning of dry matter and N in durum wheat which, in turn, modified grain yield and N content. Grain yield was better expressed at 20/15 °C, while grain protein concentration was favoured under the 28/23 °C temperature regime. Higher temperature promoted remobilization of dry matter and restrained current photosynthesis, but reduced grain yield, indicating that the loss of photosynthesis could not compensate for the gain from increased remobilization. Grain N content, on the contrary, was promoted under the higher temperature regime, as high temperature reduced N remobilization but did not inhibit root water and nitrogen uptake, given that no water shortage occur.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3391ff6bc711ee1d534ae507e87b11ddTest
https://doi.org/10.1556/crc.38.2010.2.16Test

المؤلفون: Iduna Arduini, Alessandro Masoni, Laura Ercoli, Marco Mariotti

المصدر: Cereal Research Communications. 34:1299-1306

مصطلحات موضوعية: grain filling, Physiology, Crop yield, durum wheat, Plant physiology, Biomass, accumulation, dry matter, gravel content, remobilization, Bulk density, Agronomy, Dry weight, Anthesis, Soil water, Genetics, Environmental science, Dry matter, Agronomy and Crop Science

الوصف: Soil gravel content affects many soil physical properties, i.e. bulk density, porosity, water infiltration and storage, as well as crop yield. Little is known regarding the influence of soil gravel content on grain yield of durum wheat ( Triticum durum Desf.). In this paper the accumulation of dry matter during the vegetative and reproductive periods and the contribution of pre-anthesis assimilates to grain yield have been evaluated in two durum wheat varieties grown on soils with 0, 10, 20, and 30% gravel content. The two varieties showed similar behaviour and more soil gravel decreased plant biomass both at anthesis and at maturity. Soil gravel content greatly reduced grain yield and dry weight of all plant parts both at anthesis and maturity. Post-anthesis dry matter accumulation was 16% lower in plants grown on 30% gravel soil and dry matter remobilization was 53% lower, compared to plants grown in gravel-free soil. The differences in growth rate were attributed to the restriction of the volume of soi...

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83e907810c16ee80a344e75d1f892cc7Test
https://doi.org/10.1556/crc.34.2006.4.272Test