caa a22 4500 605480559 CHVBK 20210128100416.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s11099-015-0078-5 doi (NATIONALLICENCE)springer-10.1007/s11099-015-0078-5 Corylus avellana responsiveness to light variations: morphological, anatomical, and physiological leaf trait plasticity [Elektronische Daten] [R. Catoni, M. Granata, F. Sartori, L. Varone, L. Gratani] Morphological, anatomical, and physiological leaf traits of Corylus avellana plants growing in different light conditions within the natural reserve "Siro Negri” (Italy) were analyzed. The results highlighted the capability of C. avellana to grow both in sun and shade conditions throughout several adaptations at leaf level. In particular, the more than 100% higher specific leaf area in shade is associated to a 44% lower palisade to spongy parenchyma thickness ratio compared with that in sun. Moreover, the chlorophyll (Chl) a to Chl b ratio decreased in response to the 97% decrease in photosynthetic photon flux density. The results highlighted the decrease in the ratio of Chl to carotenoid content, the maximum PSII photochemical efficiency, and the actual PSII photochemical efficiency (ΦPSII) associated with the increase in the ratio of photorespiration to net photosynthesis (P N) in sun. Chl a/b ratio was the most significant variable explaining P N variations in shade. In sun, P N was most influenced by the ratio between the fraction of electron transport rate (ETR) used for CO2 assimilation and ETR used for photorespiration, by ΦPSII, nitrogen content per leaf area, and by total Chl content per leaf area. The high phenotypic plasticity of C. avellana (PI = 0.33) shows its responsiveness to light variations. In particular, a greater plasticity of morphological (PIm = 0.41) than of physiological (PIp = 0.36) and anatomical traits (PIa = 0.24) attests to the shade tolerance of the species. The Institute of Experimental Botany, 2015 leaf area nationallicence leaf respiration nationallicence leaf thickness nationallicence photorespiration nationallicence C : soil organic carbon content nationallicence C/N : ratio between carbon and nitrogen content nationallicence Chl : chlorophyll nationallicence Car : carotenoid content nationallicence C i : substomatal CO2 concentration nationallicence DM : dry mass nationallicence E : transpiration rate nationallicence ETR : electron transport rate nationallicence ETRA : fraction of ETR used for CO2 assimilation nationallicence ETRP : fraction of ETR used for photorespiration nationallicence F0 : minimal fluorescence yield of dark-adapted state nationallicence F0′ : minimal fluorescence yield of the light-adapted state nationallicence Fm : maximal fluorescence yield of the dark-adapted state nationallicence Fm′ : maximal fluorescence yield of the light-adapted state nationallicence Fs : steady-state fluorescence yield nationallicence Fv/Fm : maximal quantum yield of PSII photochemistry nationallicence g m : mesophyll conductance nationallicence g s : stomatal conductance nationallicence LA : leaf area nationallicence L : total leaf thickness nationallicence N : total soil nitrogen content nationallicence Na : leaf nitrogen content nationallicence PI : mean plasticity index nationallicence PIa : anatomical plasticity index nationallicence PIm : morphological plasticity index nationallicence PIp : physiological plasticity index nationallicence P N : net photosynthetic rate nationallicence PNUE : photosynthetic nitrogen use efficiency nationallicence P r : photorespiration rates nationallicence R D : respiration rate nationallicence RH : relative air humidity nationallicence SLA : specific leaf area nationallicence SOM : soil organic matter content nationallicence SWC : soil water content nationallicence T a : air temperature nationallicence T l : leaf temperature nationallicence T m : mean air temperature nationallicence T max : mean maximum air temperature nationallicence T min : mean minimum air temperature nationallicence ΦPSII : effective quantum yield of PSII photochemistry nationallicence Catoni R. Department of Environmental Biology, Sapienza University of Rome, P.le A. Moro 5, 00185, Rome, Italy aut Granata M. Department of Earth and Environmental Sciences, University of Pavia, Via S. Epifanio 14, 27100, Pavia, Italy aut Sartori F. Department of Earth and Environmental Sciences, University of Pavia, Via S. Epifanio 14, 27100, Pavia, Italy aut Varone L. Department of Environmental Biology, Sapienza University of Rome, P.le A. Moro 5, 00185, Rome, Italy aut Gratani L. Department of Environmental Biology, Sapienza University of Rome, P.le A. Moro 5, 00185, Rome, Italy aut Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/1(2015-03-01), 35-46 0300-3604 53:1<35 2015 53 11099 https://doi.org/10.1007/s11099-015-0078-5 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/s11099-015-0078-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Catoni R. Department of Environmental Biology, Sapienza University of Rome, P.le A. Moro 5, 00185, Rome, Italy aut NATIONALLICENCE 700 1- Granata M. Department of Earth and Environmental Sciences, University of Pavia, Via S. Epifanio 14, 27100, Pavia, Italy aut NATIONALLICENCE 700 1- Sartori F. Department of Earth and Environmental Sciences, University of Pavia, Via S. Epifanio 14, 27100, Pavia, Italy aut NATIONALLICENCE 700 1- Varone L. Department of Environmental Biology, Sapienza University of Rome, P.le A. Moro 5, 00185, Rome, Italy aut NATIONALLICENCE 700 1- Gratani L. Department of Environmental Biology, Sapienza University of Rome, P.le A. Moro 5, 00185, Rome, Italy aut NATIONALLICENCE 773 0- Photosynthetica The Institute of Experimental Biology of the Czech Academy of Sciences 53/1(2015-03-01), 35-46 0300-3604 53:1<35 2015 53 11099