Effect of drought on leaf gas exchange, carbon isotope discrimination, transpiration efficiency and productivity in field grown durum wheat genotypes
作者： Philippe Monneveux , Djamila Rekika , Edmundo Acevedo , Othmane Merah
DOI: 10.1016/J.PLANTSCI.2005.12.008
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摘要: Abstract Under drought prone conditions, wheat productivity is strongly related to photosynthetic activity and transpiration efficiency. In the present study, photosynthesis traits were assessed at anthesis under rainfed irrigated conditions on five durum (Triticum Desf.) cultivars grown Mediterranean conditions. Carbon isotope discrimination was also evaluated in flag leaf (ΔLa) grain maturity (ΔGm). highly significant correlations found between both ΔLa ΔGm, CO2 exchange rate (CER), stomatal conductance (gs) internal ambient concentration ratio (Ci/Ca). ΔGm correlated negatively with efficiency (measured as CER/gs) positively associated yield. No correlation observed mesophyll CER. contrast, latter trait gs suggesting that CER driven by limitations. It concluded breeding for high would lead, higher conductance, lower
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