Stomatal response of Pinus sylvestriformis to elevated CO2 concentrations during the four years of exposure

编号 zgly0000363275

文献类型 期刊论文

文献题名 Stomatal response of Pinus sylvestriformis to elevated CO2 concentrations during the four years of exposure

学科分类 220.99;林学其他学科

作者 ZHOUYu-mei  HANShi-jie  LIUYing  JIAXia 

作者单位 InstituteofAppliedEcology  ChineseAcademyofSciences  Shenyang110016  P.R.China 

母体文献 Journal of Forestry Research;林业研究: 英文版 

年卷期 2005,16(1)

页码 15-18,i001

年份 2005 

分类号 S791.24 

关键词 长白松  气孔导度  气孔数量  二氧化碳  生长季 

文摘内容 Four-year-old Pinus sylvestriformis were exposed for four growing seasons in open top chambers to ambient CO2 concentration(approx. 350 μmol - tool^-1) and high CO2 concentrations (500 and 700 μmol- mol^1) at Research Station of Changbai Mountain Forest Ecosystems, Chinese Academy of Sciences at Antu Town, Jilin Province, China (42°N, 128°E). Stomatal response to elevated CO2 concentrations was examined by stomatal conductance (gs), ratio of intercellular to ambient CO2 concentration (CJCa) and stomatal number. Reciprocal transfer experiments of stomatal conductance showed that stomatal conductance in high-[CO2]-grown plants increased in comparison with ambient-[CO2]-grown plants when measured at their respective growth CO2 concentration and at the same measurement CO2 concentration (except a reduction in 700 μmol- mol^-1 CO2 grown plants compared with plants on unchambered field when measured at growth CO2 concentration and 350 μmol- mol^-1CO2). High-[CO2]-grown plants exhibited lower Ci/Ca ratios than ambient-[CO2]-grown plants when measured at their respective growth CO2 concentration. However, Ci/Ca ratios increased for plants grown in high CO2 concentrations compared with control plants when measured at the same CO2 concentration. There was no significant difference in stomatal number per unit long needle between elevated and ambient CO2. However, elevated CO2 concentrations reduced the total stomatal number of whole needle by the decline of stomatal line and changed the allocation pattern of stomata between upper and lower surface of needle。