Changes in foliar carbon isotope composition and seasonal stomatal conductance reveal adaptive traits in Mediterranean coppices affected by drought

作     者：Giovanni Di Matteo Luigi Perini Paolo Atzori Paolo De Angelis Tiziano Mei Giada Bertini Gianfranco Fabbio Giuseppe Scarascia Mugnozza 

作者机构：Consiglio per la Ricerca e la sperimentazione in Agricoltura Research Unit for Climatology and Meteorology applied to Agriculture CRACMA I-00186 Rome Italy University of Viterbo Department for Innovation in Biological Agrofood and Forest systems DIBAF I-01100 Viterbo Italy Ente Foreste della Sardegna Servizio Territoriale di Cagliari Viale Luigi Merello 86 I-09123 Cagliari Italy Consiglio per la Ricerca e la sperimentazione in Agricoltura Forestry Research Centre CRA-SEL I-52100 Arezzo Italy 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2014年第25卷第4期

页      面：839-845页

核心收录：

学科分类：090703[农学-森林保护学] 0907[农学-林学] 08[工学] 0829[工学-林业工程] 09[农学] 

基　　金：supported by the Italian Ministry for Agricultural and Forest Policy under the programme Ri.Selv.Italia(Research unit 3.2.1 DIBAF University of Viterbo) 

主　　题：Mediterranean forest ecosystems forest acclimation stableisotopes, leaf gas exchanges water-use efficiency foliar traits adaptivesilviculture. 

摘      要：We estimated water-use efficiency and potential photosyn- thetic assimilation of Holm oak （Quercus ilex L.） on slopes of NW and SW aspects in a replicated field test examining the effects of intensifying drought in two Mediterranean coppice forests. We used standard tech- niques for quantifying gas exchange and carbon isotopes in leaves and analyzed total chlorophyll, carotenoids and nitrogen in leaves collected from Mediterranean forests managed under the coppice system. We pos- tulated that responses to drought of coppiced trees would lead to differ- ential responses in physiological traits and that these traits could be used by foresters to adapt to predicted warming and drying in the Mediterra- nean area. We observed physiological responses of the eoppiced trees that suggested acclimation in photosynthetic potential and water-use effi- ciency： （1） a significant reduction in stomatal conductance （p〈0.01） wasrecorded as the drought increased at the SW site; （2） foliar 813C increased as drought increased at the SW site （p〈0.01）; （3） variations in levels of carotenoids and foliar nitrogen, and differences in foliar morphology were recorded, and were tentatively attributed to variation in photosyn- thetic assimilation between sites. These findings increase knowledge of the capacity for acclimation of managed forests in the Mediterranean region of Europe.