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首页> 外文期刊>Journal of Forestry Research >Stomatal response of Pinus sylvestriformis to elevated CO_2 concentrations during the four years of exposure
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Stomatal response of Pinus sylvestriformis to elevated CO_2 concentrations during the four years of exposure

机译：在暴露的四年中，樟子松气孔对CO_2浓度升高的响应

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Four-year-old Pinus sylvestriformis were exposed for four growing seasons in open top chambers to ambient CO_2 concentration (approx. 350 umol centry to mol~(-1)) and high CO_2 concentrations (500 and 700 umol centry to 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 CO_2 concentrations was examined by Stomatal conductance (g,), ratio of intercellular to ambient CO_2 concentration (c_i/c_a)-and Stomatal number. Reciprocal transfer experiments of Stomatal conductance showed that Stomatal conductance in high-[CO_2]-grown plants increased in comparison with ambient-[CO_2]-grown plants when measured at their respective growth CO_2 concentration and at the same measurement CO_2 concentration (except a reduction in 700 umol centry mor~(-1) CO_2 grown plants compared with plants on unchambered field when measured at growth CO_2 concentration and 350 umol centry to mol~(-1) CO_2). High-[CO_2]-grown plants exhibited lower c_i/c_a ratios than ambient-[CO_2]-grown plants when measured at their respective growth CO_2 concentration. However, c_i/c_a ratios increased for plants grown in high CO_2 concentrations compared with control plants when measured at the same CO_2 concentration. There was no significant difference in Stomatal number per unit long needle between elevated and ambient CO_2. However, elevated CO_2 concentrations reduced the total Stomatal number of whole needleby the decline of Stomatal line and changed the allocation pattern of stomata between upper and lower surface of needle.
机译：四岁的樟子松在开放式室中暴露于环境CO_2浓度（大约350 umol mol至（mol-1））和高CO_2浓度（500和700 umol mol至mol〜（-）四个生长季节。 1））在中国科学院吉林省安图镇长白山森林生态系统研究站（北纬42°，东经128°）。通过气孔导度（g），细胞间与环境CO_2浓度之比（c_i / c_a）和气孔数检查气孔对升高的CO_2浓度的反应。气孔电导率的相互转移实验表明，高[[CO_2]]植物的气孔导度与环境[[CO_2]]生长的植物相比，在各自的生长CO_2浓度和相同的测量CO_2浓度下（降低除外）在生长CO_2浓度和350 umol相对于mol〜（-1）CO_2的测量下，在700 umol cent mor〜（-1）CO_2种植的植物中与未进行室内种植的植物相比。在其各自生长的CO_2浓度下测量时，高[CO_2]生长的植物显示的c_i / c_a比比周围[CO_2]生长的植物低。然而，当在相同CO_2浓度下测量时，与对照植物相比，在高CO_2浓度下生长的植物的c_i / c_a比率增加。在升高的CO_2和周围的CO_2之间，每根长针的气孔数没有明显差异。然而，升高的CO_2浓度通过气孔线的减少而减少了整个针的总气孔数，并改变了针的上，下表面之间的气孔分配方式。

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