caa a22 4500 605480478 CHVBK 20210128100415.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s11099-015-0082-9 doi (NATIONALLICENCE)springer-10.1007/s11099-015-0082-9 Evaluation of photosynthetic potential of wheat genotypes under drought condition [Elektronische Daten] [S. Sikder, J. Foulkes, H. West, J. De Silva, O. Gaju, A. Greenland, P. Howell] Water availability is one of the most important limiting factors in agriculture worldwide, particularly in arid and semiarid regions. Six spring wheat genotypes, i.e. three UK cultivars Cadenza, Paragon, and Xi-19 and three synthetic-derived lines L-22, L-24, and L-38, were grown in a phytotron under well-watered (until 40 days after sowing) and drought conditions. The aim of the study was to evaluate the traits related to photosynthetic capacity (net photosynthesis rate, stomatal conductance, internal CO2 concentration, transpiration rate, carboxylation capacity, instantaneous and intrinsic water-use efficiency) and plant biomass production in the cultivars and synthetic derivatives of wheat genotypes under well-watered and water-limited conditions. Genotypic variations in gas-exchange traits including net photosynthetic rate, carboxylation capacity, instantaneous water-use efficiency, and biomass yield were found amongst genotypes. Drought significantly reduced the total dry matter per plant. The synthetic derivatives L-22 and L-24 showed higher performance of stomata for most of the stomatal aperture characteristics. Total dry matter was positively related to net photosynthetic rate and to instantaneous and intrinsic water-use efficiencies. Finally, net photosynthetic rate was also positively related to stomatal conductance and transpiration rate under both the well-watered and water-limited drought conditions. The Institute of Experimental Botany, 2015 leaf gas-exchange measurements nationallicence pot experiment nationallicence water regimes nationallicence C i : intercellular CO2 concentration nationallicence DAS : days after sowing nationallicence E : transpiration rate nationallicence g s : stomatal conductance nationallicence P N : net photosynthetic rate nationallicence P N/ C i : carboxylation capacity nationallicence TDM : total dry matter nationallicence WL : water-limited nationallicence WW : well-watered nationallicence WUE : instantaneous water-use efficiency (= P N/E) nationallicence WUEi : intrinsic water-use efficiency (= P N/g s) nationallicence Sikder S. School of Biosciences, University of Nottingham, LE12 5RD, Loughborough, UK aut Foulkes J. School of Biosciences, University of Nottingham, LE12 5RD, Loughborough, UK aut West H. School of Biosciences, University of Nottingham, LE12 5RD, Loughborough, UK aut De Silva J. School of Biosciences, University of Nottingham, LE12 5RD, Loughborough, UK aut Gaju O. School of Biosciences, University of Nottingham, LE12 5RD, Loughborough, UK aut Greenland A. National Institute of Agricultural Botany, CB3 0LE, Cambridge, UK aut Howell P. National Institute of Agricultural Botany, CB3 0LE, Cambridge, UK aut Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/1(2015-03-01), 47-54 0300-3604 53:1<47 2015 53 11099 https://doi.org/10.1007/s11099-015-0082-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11099-015-0082-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sikder S. School of Biosciences, University of Nottingham, LE12 5RD, Loughborough, UK aut NATIONALLICENCE 700 1- Foulkes J. School of Biosciences, University of Nottingham, LE12 5RD, Loughborough, UK aut NATIONALLICENCE 700 1- West H. School of Biosciences, University of Nottingham, LE12 5RD, Loughborough, UK aut NATIONALLICENCE 700 1- De Silva J. School of Biosciences, University of Nottingham, LE12 5RD, Loughborough, UK aut NATIONALLICENCE 700 1- Gaju O. School of Biosciences, University of Nottingham, LE12 5RD, Loughborough, UK aut NATIONALLICENCE 700 1- Greenland A. National Institute of Agricultural Botany, CB3 0LE, Cambridge, UK aut NATIONALLICENCE 700 1- Howell P. National Institute of Agricultural Botany, CB3 0LE, Cambridge, UK aut NATIONALLICENCE 773 0- Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/1(2015-03-01), 47-54 0300-3604 53:1<47 2015 53 11099