文献类型：期刊文献

英文题名：Concentration- and flux-based ozone dose-response relationships for five poplar clones grown in North China

作者：Hu, Enzhu[1] Gao, Feng[1] Xin, Yue[1] Jia, Huixia[2] Li, Kaihui[3] Hu, Jianjun[2] Feng, Zhaozhong[1]

第一作者：Hu, Enzhu

通信作者：Hu, JJ[1]

机构：[1]Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat State Forestry A, Beijing 100091, Peoples R China;[3]Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China

年份：2015

卷号：207

起止页码：21-30

外文期刊名：ENVIRONMENTAL POLLUTION

收录：;EI(收录号：20153601233432);Scopus(收录号：2-s2.0-84940521614);WOS:【SCI-EXPANDED(收录号:WOS:000366617500003)】；

基金：This study has been funded by the Hundred Talents Program, Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, and the National Natural Science Foundation of China (No. 41401225). We thank Dr. Harry Harmens for English improvement throughout the manuscript.

语种：英文

外文关键词：Stomatal conductance; Ozone flux; Dose-response relationship; Critical level; Poplar

摘要：Concentration- and flux-based O-3 dose-response relationships were developed for poplars in China. Stomatal conductance (g(s)) of five poplar clones was measured to parameterize a Jarvis-type multiplicative gs model. The maximum gs and other model parameters varied between clones. The strongest relationship between stomatal O-3 flux and total biomass was obtained when phytotoxic ozone dose (POD) was integrated using an uptake rate threshold of 7 nmol m(-2) s(-1). The R-2 value was similar between flux-based and concentration-based dose-response relationships. Ozone concentrations above 28 -36 nmol mol(-1) contributed to reducing the biomass production of poplar. Critical levels of AOT(40) (accumulated O-3 exposure over 40 nmol mol(-1)) and POD7 in relation to 5% reduction in total biomass for poplar were 12 mu mol mol(-1) h and 3.8 mmol m(-2), respectively. (C) 2015 Elsevier Ltd. All rights reserved.