Elevated CO2 offsets the alteration of foliar chemicals(n-icosane,geranyl acetate,and elixene)induced by elevated O3 in three taxa of O3-tolerant eucalypts

作     者：Eka Novriyanti Qiaozhi Mao Evgenios Agathokleous Makoto Watanabe Yasuyuki Hashidoko Takayoshi Koike Eka Novriyanti;Qiaozhi Mao;Evgenios Agathokleous;Makoto Watanabe;Yasuyuki Hashidoko;Takayoshi Koike

作者机构：Research and Development Institute of Forest Fiber TechnologyFOERDIAMinistry of Environment and ForestryKotak Pos 4/BKN BangkinangKamparRiau 28411Indonesia Division of Environment and Resources ResearchResearch Faculty of AgricultureHokkaido UniversitySapporoHokkaido 060-8589Japan College of Resources and EnvironmentSouthwest UniversityChongqing 400700China Institute of Applied EcologyKey Laboratory of Agrometeorology of Jiangsu ProvinceNanjing University of Information Science and TechnologyNanjing 210044JiangsuChina Institute of AgricultureTokyo University of Agriculture and TechnologyFuchuTokyo 183-8509Japan Division of Applied Biological SciencesResearch Faculty of AgricultureHokkaido Univ.SapporoHokkaido 060-8589Japan Shenzhen Graduate School of Environment and EnergyPeking UniversityBeijing 518055China Research Center for Eco-Environmental ScienceChinese Academy of ScienceBeijing 100085China 

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

年 卷 期：2021年第32卷第2期

页      面：789-803页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0907[农学-林学] 08[工学] 0829[工学-林业工程] 0901[农学-作物学] 

基　　金：supported by a Grant-in-Aid for Scientific Researches(Nos.21114008,23380078) JST Grant(No.JPMJSC18HB) the RA-GCOE project. 

主　　题：Carbon dioxide Epicuticular wax Eucalypts Secondary metabolism Tropospheric ozone 

摘      要：Eucalypts are important forest resources in southwestern China,and may be tolerant to elevated ground-level ozone(O3)concentrations that can negatively affect plant growth.High CO2 may offset O3-induced effects by providing excess carbon to produce secondary metabolites or by inducing stomatal closure.Here,the effects of elevated CO2 and O3 on leaf secondary metabolites and other defense chemicals were studied by exposing seedlings of Eucalyptus globulus,E.grandis,and E.camaldulensis×E.deglupta to a factorial combination of two levels of O3(10 nmol mol^(−1)and 60 nmol mol^(−1))and CO2(ambient:370μmol mol^(−1)and 600μmol mol^(−1))in open-top field chambers.GC-profiles of leaf extracts illustrated the effect of elevated O3 and the countering effect of high CO2 on compounds in leaf epicuticular wax and essential oils,i.e.,n-icosane,geranyl acetate and elixene,compounds known as a first-line defense against insect herbivores.n-Icosane may be involved in tolerance mechanisms of E.grandis and the hybrid,while geranyl acetate and elixene in the tolerance of E.globulus.Elevated O3 and CO2,singly or in combination,affected only leaf physiology but not biomass of various organs.Elevated CO2 impacted several leaf traits,including stomatal conductance,leaf mass per area,carbon,lignin,n-icosane,geranyl acetate and elixene.Limited effects of elevated O3 on leaf physiology(nitrogen,n-icosane,geranyl acetate,elixene)were commonly offset by elevated CO2.We conclude that E.globulus,E.grandis and the hybrid were tolerant to these O3 and CO2 treatments,and n-icosane,geranyl acetate and elixene may be major players in tolerance mechanisms of the tested species.