thylenediurea(EDU)effects on Japanese larch:an one growing season experiment with simulated regenerating communities and a four growing season application to individual saplings  

作　　者：Evgenios Agathokleous Mitsutoshi Kitao Xiaona Wang Qiaozhi Mao Hisanori Harayama William JManning Takayoshi Koike 

机构地区：[1]Key Laboratory of Agrometeorology of Jiangsu Province,Institute of Applied Ecology,Nanjing University of Information Science and Technology(NUIST),Nanjing 210044,People’s Republic of China [2]Division of Environment and Resources Research,Research Faculty of Agriculture,Hokkaido University,Sapporo 060-8589,Japan [3]Hokkaido Research Center,Forestry and Forest Products Research Institute(FFPRI),Sapporo 062-8516,Japan [4]College of Landscape Architecture and Tourism,Hebei Agricultural University,No.2596 Lekai South Street,Lianchi District,Baoding 071000,People’s Republic of China [5]College of Resources and Environment,Southwest University,Chongqing 400700,People’s Republic of China [6]Ecophysiology Laboratory,Department of Plant Ecology,Forestry and Forest Products Research Institute(FFPRI),Matsunosato-1,Tsukuba 305-8687,Japan [7]Department of Plant,Soil and Insect Sciences,University of Massachusetts,80 Campus Center Way,Amherst,MA 01003,USA [8]Shenzhen Graduate School of Environment and Energy,Peking University,Shenzhen 518055,People’s Republic of China [9]Research Center for Eco-Environmental Science,Chinese Academy of Science,Beijing 100085,People’s Republic of China

出　　处：《Journal of Forestry Research》2021年第5期2047-2057,共11页林业研究（英文版）

基　　金：supported in part by Research Grant#201802 of the Forestry and Forest Products Research Institute;by KAKENHI Grant Number JP17F17102 of the Japan Society for the Promotion of Science(JSPS)。

摘　　要：Japanese larch(Larix kaempferi(Lamb.)Carr.)and its hybrid are economically important coniferous trees widely grown in the Northern Hemisphere.Ground-level ozone(O_(3))concentrations have increased since the preindustrial era,and research projects showed that Japanese larch is susceptible to elevated O_(3)exposures.Therefore,methodologies are needed to(1)protect Japanese larch against O_(3)damage and(2)conduct biomonitoring of O_(3)in Japanese larch forests and,thus,monitor O_(3)risks to Japanese larch.For the first time,this study evaluates whether the synthetic chemical ethylenediurea(EDU)can protect Japanese larch against O_(3)damage,in two independent experiments.In the first experiment,seedling communities,simulating natural regeneration,were treated with EDU(0,100,200,and 400 mg L^(-1))and exposed to either ambient or elevated O_(3)in a growing season.In the second experiment,individually-grown saplings were treated with EDU(0,200 and 400 mg L-1)and exposed to ambient O_(3)in two growing seasons and to elevated O_(3)in the succeeding two growing seasons.The two experiments revealed that EDU concentrations of 200-400 mg L^(-1)could protect Japanese larch seedling communities and individual saplings against O_(3)-induced inhibition of growth and productivity.However,EDU concentrations≤200 mg L^(-1)did offer only partial protection when seedling communities were coping with higher level of O_(3)-induced stress,and only 400 mg EDU L^(-1)fully protected communities under higher stress.Therefore,we conclude that among the concentrations tested the concentration offering maximum protection to Japanese larch plants under high competition and O_(3)-induced stress is that of 400 mg EDU L^(-1).The results of this study can provide a valuable resource of information for applied forestry in an O_(3)-polluted world.

关 键 词：Air pollution Antiozonant Ethylenediurea(EDU) Plant protection Tropospheric ozone(O_(3)) 

分 类 号：S791.223[农业科学—林木遗传育种]