caa a22 4500 605480583 CHVBK 20210128100416.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s11099-015-0090-9 doi (NATIONALLICENCE)springer-10.1007/s11099-015-0090-9 Fertilization regimes under hot conditions alter photosynthetic response of bean plants [Elektronische Daten] [I. Hassan, H. Abou Zeid, W. Taia, N. Haiba, A. Zahran, R. Badr, R. El Dakak, E. Shalaby] We examined the effects of foliar application of various nitrogen (urea) concentrations on gas-exchange and chlorophyll (Chl) fluorescence characteristics in bean plants treated by heat stress (42/30°C, day/night temperatures). Heat stress caused reductions in contents of Chl a, Chl b, and in maximum photochemical efficiency of PSII by 13, 20, and 27%, respectively, regardless of the N treatment. However, N fertilization caused significant increases in these parameters, especially at higher N concentrations. The net photosynthetic rate and stomatal conductance were enhanced by 32, 60, and 69% and by 25, 88, and 100% due to addition of 5, 10, and 15 mM N, respectively. However, gas-exchange parameters were reduced by 24% due to heat stress. N fertilization alleviated adverse effects of heat stress. The Institute of Experimental Botany, 2015 heat stress nationallicence nitrogen fertilization nationallicence photosynthetic performance nationallicence Phaseolus vulgaris L nationallicence Chl : chlorophyll nationallicence FM : fresh mass nationallicence HS : heat stress nationallicence P N : net photosynthetic rate nationallicence g s : stomatal conductance to water vapour nationallicence qp : photochemical quenching coefficient nationallicence NPQ : nonphotochemical quenching nationallicence Fv/Fm : maximum photochemical efficiency of PSII nationallicence ROS : reactive oxygen species nationallicence ΦII : effective quantum yield of PSII photochemistry nationallicence Hassan I. Air Pollution Laboratory (APL), Centre of Excellence in Environmental Studies (CEES), King Abdulaziz University, P.O. Box 80216, 21589, Jeddah, Saudi Arabia aut Abou Zeid H. Department of Botany, Faculty of Science, Alexandria University, 21526, El Shatby, Alexandria, Egypt aut Taia W. Department of Botany, Faculty of Science, Alexandria University, 21526, El Shatby, Alexandria, Egypt aut Haiba N. Department of Chemistry and Physics, Faculty of Education, Alexandria University, Alexandria, Egypt aut Zahran A. Department of Evaluation of Natural Sources, Institute of Environmental Studies and Research, University of Sadat City, Sadat City, Egypt aut Badr R. Department of Botany, Faculty of Science, Alexandria University, 21526, El Shatby, Alexandria, Egypt aut El Dakak R. Department of Botany, Faculty of Science, Alexandria University, 21526, El Shatby, Alexandria, Egypt aut Shalaby E. Department of Environmental Studies, Institute of Graduate Studies and Research, Alexandria University, Alexandria, Egypt aut Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/1(2015-03-01), 157-160 0300-3604 53:1<157 2015 53 11099 https://doi.org/10.1007/s11099-015-0090-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 brief-communication jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11099-015-0090-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hassan I. Air Pollution Laboratory (APL), Centre of Excellence in Environmental Studies (CEES), King Abdulaziz University, P.O. Box 80216, 21589, Jeddah, Saudi Arabia aut NATIONALLICENCE 700 1- Abou Zeid H. Department of Botany, Faculty of Science, Alexandria University, 21526, El Shatby, Alexandria, Egypt aut NATIONALLICENCE 700 1- Taia W. Department of Botany, Faculty of Science, Alexandria University, 21526, El Shatby, Alexandria, Egypt aut NATIONALLICENCE 700 1- Haiba N. Department of Chemistry and Physics, Faculty of Education, Alexandria University, Alexandria, Egypt aut NATIONALLICENCE 700 1- Zahran A. Department of Evaluation of Natural Sources, Institute of Environmental Studies and Research, University of Sadat City, Sadat City, Egypt aut NATIONALLICENCE 700 1- Badr R. Department of Botany, Faculty of Science, Alexandria University, 21526, El Shatby, Alexandria, Egypt aut NATIONALLICENCE 700 1- El Dakak R. Department of Botany, Faculty of Science, Alexandria University, 21526, El Shatby, Alexandria, Egypt aut NATIONALLICENCE 700 1- Shalaby E. Department of Environmental Studies, Institute of Graduate Studies and Research, Alexandria University, Alexandria, Egypt aut NATIONALLICENCE 773 0- Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/1(2015-03-01), 157-160 0300-3604 53:1<157 2015 53 11099