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 

机构地区：[1]Research and Development Institute of Forest Fiber Technology,FOERDIA,Ministry of Environment and Forestry,Kotak Pos 4/BKN Bangkinang,Kampar,Riau 28411,Indonesia [2]Division of Environment and Resources Research,Research Faculty of Agriculture,Hokkaido University,Sapporo,Hokkaido 060-8589,Japan [3]College of Resources and Environment,Southwest University,Chongqing 400700,China [4]Institute of Applied Ecology,Key Laboratory of Agrometeorology of Jiangsu Province,Nanjing University of Information Science and Technology,Nanjing 210044,Jiangsu,China [5]Institute of Agriculture,Tokyo University of Agriculture and Technology,Fuchu,Tokyo 183-8509,Japan [6]Division of Applied Biological Sciences,Research Faculty of Agriculture,Hokkaido Univ.,Sapporo,Hokkaido 060-8589,Japan [7]Shenzhen Graduate School of Environment and Energy,Peking University,Beijing 518055,China [8]Research Center for Eco-Environmental Science,Chinese Academy of Science,Beijing 100085,China

出　　处：《Journal of Forestry Research》2021年第2期789-803,共15页林业研究（英文版）

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

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.

关 键 词：Carbon dioxide Epicuticular wax EUCALYPTS Secondary metabolism Tropospheric ozone 

分 类 号：S792.39[农业科学—林木遗传育种]