Leaf thermal tolerance and sensitivity of temperate tree species are correlated with leaf physiological and functional drought resistance traits

作     者：Ines Katharina Münchinger Peter Hajek Berivan Akdogan Astor Torano Caicoya Norbert Kunert Ines Katharina Münchinger;Peter Hajek;Berivan Akdogan;Astor Tora?o Caicoya;Norbert Kunert

作者机构：Department of Integrative Biology and Biodiversity ResearchInstitute of BotanyUniversity of Natural Resources and Life Sciences ViennaGregor-Mendel Str.331190 ViennaAustria GeobotanyUniversity of FreiburgSchanzlestr.179104 FreiburgGermany TUMSchool of Live SciencesChair of Forest Growth and Yield ScienceTechnical University of MunichGermanyHans-Carl-Von-Carlowitz 285354 FreisingGermany 

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

年 卷 期：2023年第34卷第1期

页      面：63-76页

核心收录：

学科分类：0907[农学-林学] 07[理学] 0713[理学-生态学] 

基　　金：DIBB 

主　　题：Water stress Heat stress Physiological limitations Climate change ForestGEO 

摘      要：Climate change is causing more frequent and severe climatic events,such as extreme heat and co-occurring drought,potentially accelerating tree *** tree species will cope better with those extreme events is still being *** study focuses on heat as a physiological stress factor and interspecifi c variation of thermal tolerance and sensitivity traits in 15 temperate coniferous and broad-leaved tree *** investigate(1)whether thermal tolerance and sensitivity traits correlate with a droughtrelated physiological trait,particularly the leaf turgor loss point(πtlp,wilting point),and(2)how thermal tolerance and sensitivity traits co-vary within diff erent tree-functional types classifi ed by morphological and physiological traits of the leaf,i.e.,leaf mass per area(LMA)and percentage loss of area(PLA).The study was carried out in the Traunstein Forest Dynamics Plot of the ForestGEO network in *** temperature response of the maximum quantum yield of photosystem II(F_(v)/F_(m))on leaf discs was determined,from which various physiological leaf traits were estimated,one of which is the breaking point temperature(T_(5)),the temperature at which F_(v)/F_(m)declines by 5%.Additionally,the temperature of 50%(T_(50))and 95%(T_(95))decline in F_(v)/F_(m)was *** decline width between T_(50)and T 5(DW T_(50)−T_(5))was taken as an indicator of the species’thermal *** breaking point temperature ranged from 35.4±3.0 to 47.9±3.9℃among the investigated tree species and T 50 ranged between 46.1±0.4 and 53.6±0.7℃.A large interspecifi c variation of thermal tolerance and sensitivity was *** ash(Fraxinus excelsior L.)was the most heat-sensitive species,while Wild cherry(Prunus avium L.)was the least heat-sensitive *** with a more negativeπtlp tended to have a higher breaking point temperature than species with a less negativeπtlp.A lower thermal sensitivity characterized species with a higher LMA,and high PLA was