caa a22 4500 605480850 CHVBK 20210128100417.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s11099-015-0141-2 doi (NATIONALLICENCE)springer-10.1007/s11099-015-0141-2 Trade-offs between seedling growth, plant respiration and water-use efficiency in two Mediterranean shrubs Rhamnus alaternus and Rhamnus ludovici-salvatoris [Elektronische Daten] [H. El Aou-Ouad, I. Florez-Sarasa, M. Ribas-Carbó, J. Flexas, H. Medrano, J. Gulías] Seedling recruitment is a critical developmental stage in regeneration of plant populations under Mediterranean conditions that strongly depends on water availability. Seed mass and relative growth rate (RGR) may affect the early establishment of seedlings through different physiological processes. Here, we examined the effects of the seed mass and carbon balance on seedling growth under two water regimes in Rhamnus alaternus L. and Rhamnus ludovici-salvatoris, two Mediterranean shrubs, showing a different ability to recruit seedlings. Plant water consumption and biomass accumulation (ΔB) were measured during three periods of the growth in order to estimate water use efficiency (WUE), RGR, and its components. Additionally, net photosynthesis and leaf, stem, and root respiration were measured in plants grown in pots well watered and under progressive drought. Rhamnus alaternus showed the higher seed mass, ΔB, and plant WUE than that of R. ludovici-salvatoris in all periods and water regimes. The higher RGR of R. alaternus was observed during the first and the second period, but the reverse trend was registered during the third period as a consequence of the higher initial biomass of R. alaternus. Also, R. alaternus showed a higher specific leaf area and estimated carbon balance than that of R. ludovicisalvatoris. The observed differences in ΔB, estimated carbon balance, seed mass, and WUE between both species could explain their different distribution and ability to recruit seedlings under natural conditions. The Institute of Experimental Botany, 2015 chilling temperature nationallicence leaf area ratio nationallicence seedling survival nationallicence specific leaf area nationallicence DM : dry mass nationallicence E : transpiration rate nationallicence g s : stomatal conductance nationallicence LA : leaf area nationallicence LAR : leaf area ratio nationallicence LMR : leaf mass ratio nationallicence P N : net photosynthetic rate nationallicence P Nm/ R Dm : net carbon assimilation to dark respiration ratio on a mass basis nationallicence R D : respiration rate nationallicence RGR : relative growth rate nationallicence R/S : root:shoot ratio nationallicence SLA : specific leaf area nationallicence SWC : soil water content nationallicence VPD : vapor pressure deficit nationallicence WUEi : intrinsic water-use efficiency (= P N/g s) nationallicence WUEWP : plant water-use efficiency nationallicence El Aou-Ouad H. Research Group on Plant Biology under Mediterranean Conditions, Department of Biology, Ctra Valldemossa, km 7.5. 07122, Palma de Mallorca, Spain aut Florez-Sarasa I. Research Group on Plant Biology under Mediterranean Conditions, Department of Biology, Ctra Valldemossa, km 7.5. 07122, Palma de Mallorca, Spain aut Ribas-Carbó M. Research Group on Plant Biology under Mediterranean Conditions, Department of Biology, Ctra Valldemossa, km 7.5. 07122, Palma de Mallorca, Spain aut Flexas J. Research Group on Plant Biology under Mediterranean Conditions, Department of Biology, Ctra Valldemossa, km 7.5. 07122, Palma de Mallorca, Spain aut Medrano H. Research Group on Plant Biology under Mediterranean Conditions, Department of Biology, Ctra Valldemossa, km 7.5. 07122, Palma de Mallorca, Spain aut Gulías J. Research Group on Plant Biology under Mediterranean Conditions, Department of Biology, Ctra Valldemossa, km 7.5. 07122, Palma de Mallorca, Spain aut Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/4(2015-12-01), 537-546 0300-3604 53:4<537 2015 53 11099 https://doi.org/10.1007/s11099-015-0141-2 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/s11099-015-0141-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- El Aou-Ouad H. Research Group on Plant Biology under Mediterranean Conditions, Department of Biology, Ctra Valldemossa, km 7.5. 07122, Palma de Mallorca, Spain aut NATIONALLICENCE 700 1- Florez-Sarasa I. Research Group on Plant Biology under Mediterranean Conditions, Department of Biology, Ctra Valldemossa, km 7.5. 07122, Palma de Mallorca, Spain aut NATIONALLICENCE 700 1- Ribas-Carbó M. Research Group on Plant Biology under Mediterranean Conditions, Department of Biology, Ctra Valldemossa, km 7.5. 07122, Palma de Mallorca, Spain aut NATIONALLICENCE 700 1- Flexas J. Research Group on Plant Biology under Mediterranean Conditions, Department of Biology, Ctra Valldemossa, km 7.5. 07122, Palma de Mallorca, Spain aut NATIONALLICENCE 700 1- Medrano H. Research Group on Plant Biology under Mediterranean Conditions, Department of Biology, Ctra Valldemossa, km 7.5. 07122, Palma de Mallorca, Spain aut NATIONALLICENCE 700 1- Gulías J. Research Group on Plant Biology under Mediterranean Conditions, Department of Biology, Ctra Valldemossa, km 7.5. 07122, Palma de Mallorca, Spain aut NATIONALLICENCE 773 0- Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/4(2015-12-01), 537-546 0300-3604 53:4<537 2015 53 11099