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Wheat is one of the founder crops of Western agriculture. This study reconstructs agronomic conditions, potential yields, and kernel weight in the beginnings of cultivation of domesticated free-threshing wheat, c. 8000 BC. The carbon and nitrogen stable isotope compositions and the dimensions of fossil grains of naked wheat (Triticum aestivum/durum) were(More)
The appearance of agriculture in the Fertile Crescent propelled the development of Western civilization. Here we investigate the evolution of agronomic conditions in this region by reconstructing cereal kernel weight and using stable carbon and nitrogen isotope signatures of kernels and charcoal from a set of 11 Upper Mesopotamia archaeological sites, with(More)
A common pattern in Aleppo pine Δ 13 C responses to both spatial and temporal variability in precipitation was observed, with a general agreement between NDVI, Δ 13 C and growth that confirms precipitation as key environmental driver. The aim of this study was to assess the spatiotemporal variability of carbon isotope discrimination (Δ13C) records and its(More)
Salicylic acid (SA) is an inducer of systemic acquired resistance (SAR) and could be a potential candidate in the control of plant virus diseases. In this study we assayed under controlled conditions the potential effect of three doses of exogenous SA treatment on tomato plants infected with Potato virus X (PVX) and measured their effects on: different(More)
BACKGROUND Molecular clocks drive oscillations in leaf photosynthesis, stomatal conductance, and other cell and leaf-level processes over ~24 h under controlled laboratory conditions. The influence of such circadian regulation over whole-canopy fluxes remains uncertain; diurnal CO2 and H2O vapor flux dynamics in the field are currently interpreted as(More)
This paper provides new insights into source-sink relationships and transpiration processes which will eventually help to interpret δ 18 O as a genotype selection and ecophysiological tool for maize adaptation to drought. Oxygen isotope composition (δ18O) has been proposed as a phenotyping tool to integrate leaf transpiration in C4 crops, such as maize.(More)
Evapotranspiration is a major component of the water cycle, yet only daytime transpiration is currently considered in Earth system and agricultural sciences. This contrasts with physiological studies where 25% or more of water losses have been reported to occur occurring overnight at leaf and plant scales. This gap probably arose from limitations in(More)
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