caa a22 4500 60548077X CHVBK 20210128100417.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s11099-015-0125-2 doi (NATIONALLICENCE)springer-10.1007/s11099-015-0125-2 Responses of two endemic species of Hippophae at the Qinghai-Tibet Plateau to elevated CO2 concentration [Elektronische Daten] [F. Ma, T. Xu, M. Ji, C. Zhao] The responses of photosynthesis and growth to increasing CO2 concentration ([CO2]) were investigated in Hippophae gyantsensis and H. rhamnoides subsp. yunnanensis, which are endemic at the Qinghai-Tibet Plateau and phylogenetically related, but distributed parapatrically in divergent regions. Seedlings of the two species were grown at ambient [AC; 360 μmol(CO2) mol−1] and elevated [EC; 720 μmol(CO2) mol−1] [CO2] in growth chambers. The responses to EC were significantly different between the two species. EC induced an increase in photosynthesis, stomatal conductance, intrinsic water-use efficiency, apparent quantum efficiency, total dry mass, and a decrease in photorespiration rate, maximum carboxylation rate of Rubisco, and maximum electron transport rate in H. gyantsensis compared to those in H. rhamnoides subsp. yunnanensis. Moreover, a significant increase in leaf nitrogen content and a decrease in root/shoot ratio was also observed in H. gyantsensis. H. gyantsensis showed a significantly higher specific leaf area than that of H. rhamnoides through treatments. Relative to H. rhamnoides subsp. yunnanensis, H. gyantsensis showed a greater potential to increase photosynthesis and growth to cope with the increasing [CO2] and it might expand its distribution range in the future. The Institute of Experimental Botany, 2015 biomass allocation nationallicence leaf gas exchange nationallicence leaf properties nationallicence AC : ambient [CO2] nationallicence AQE : apparent quantum efficiency nationallicence [CO2] : CO2 concentration nationallicence Carea : area-based carbon content nationallicence C i : intercellular [CO2] nationallicence C/N : carbon/nitrogen ratio nationallicence EC : elevated [CO2] nationallicence g s : stomatal conductance nationallicence LMF : leaf mass fraction nationallicence MSLA : mean single leaf area nationallicence Narea : area-based nitrogen content nationallicence J max : maximum electron transport rate nationallicence P N : net photosynthetic rate nationallicence P Nmax : light-saturated net photosynthetic rate nationallicence QTP : Qinghai-Tibet Plateau nationallicence R D : dark respiration rate nationallicence R L : photorespiration rate nationallicence RMF : root mass fraction nationallicence R/S : root/shoot ratio nationallicence SLA : specific leaf area nationallicence SMF : stem mass fraction nationallicence DM : total dry mass nationallicence V cmax : maximum carboxylation rate of Rubisco nationallicence WUEi : intrinsic water-use efficiency nationallicence Ma F. New Technology Application, Research and Development Center, Ningxia University, 750021, Yinchuan, China aut Xu T. School of Life Science, Ningxia University, 750021, Yinchuan, China aut Ji M. State Key Laboratory of Grassland Agro-Ecosystem, Lanzhou University, 730000, Lanzhou, China aut Zhao C. State Key Laboratory of Grassland Agro-Ecosystem, Lanzhou University, 730000, Lanzhou, China aut Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/3(2015-09-01), 395-402 0300-3604 53:3<395 2015 53 11099 https://doi.org/10.1007/s11099-015-0125-2 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/s11099-015-0125-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ma F. New Technology Application, Research and Development Center, Ningxia University, 750021, Yinchuan, China aut NATIONALLICENCE 700 1- Xu T. School of Life Science, Ningxia University, 750021, Yinchuan, China aut NATIONALLICENCE 700 1- Ji M. State Key Laboratory of Grassland Agro-Ecosystem, Lanzhou University, 730000, Lanzhou, China aut NATIONALLICENCE 700 1- Zhao C. State Key Laboratory of Grassland Agro-Ecosystem, Lanzhou University, 730000, Lanzhou, China aut NATIONALLICENCE 773 0- Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/3(2015-09-01), 395-402 0300-3604 53:3<395 2015 53 11099