Photosynthetic responses of aspen clones to simultaneous exposures of ozone and CO2
Photosynthetic responses of aspen clones to simultaneous exposures of ozone and CO2
复制标题
白杨克隆对同时暴露于臭氧和二氧化碳的光合反应
DOI：
10.1139/x26-074
复制
发表时间：
1996
影响因子：
2.2
通讯作者：
D. Karnosky
中科院分区：
文献类型：
--
作者：
O. Kull;A. Sõber;M. Coleman;R. E. Dickson;J. Isebrands;Z. Gagnon;D. Karnosky
目前的预测表明，到下一个世纪，滋养层臭氧和二氧化碳都将稳步增加，同时植物压力也会增加。由于这些相互作用的压力对林木的影响的信息是有限的，我们进行了臭氧和二氧化碳的实验，使用臭氧耐受和臭氧敏感的颤抖白杨（Populustremuloides Michx。）克隆（分别为克隆216和259）。将白杨植物在盆中（方波研究）或在地面中（间歇研究）在开顶室中生长。方波研究中的植物在一个生长季节暴露于木炭过滤的空气（CF）或CF加升高的二氧化碳（CO2），臭氧（O3）或O3加CO2（O3 + CO2）。 在情节研究中的植物暴露于CF的三个生长季节，两次模拟环境（2x）O3（2x O3），或2x O3加CO，（2x O3 + CO2）。 光合作用的测量，无论是在开顶室在处理CO2浓度或在受控环境中。
Current projections indicate steady increases in both trophospheric ozone and carbon dioxide well into the next century with concurrent increases in plant stress. Because information about effects of these interacting stresses on forest trees is limited, we have conducted ozone and carbon dioxide experiments using ozone-tolerant and ozone-sensitive trembling aspen (Populustremuloides Michx.) clones (clones 216 and 259, respectively). Aspen plants were grown either in pots (square-wave study) or in the ground (episodic study) in open-top chambers. Plants in the square-wave study were exposed for a single growing season to charcoal-filtered air (CF) or to CF plus elevated carbon dioxide (CO2), ozone (O3), or O3 plus CO2 (O3 + CO2). Plants in the episodic study were exposed for three growing seasons to CF, twice simulated ambient (2x) O3 (2x O3), or 2x O3 plus CO, (2x O3 + CO2). Photosynthetic measurements were made either in the open-top chambers at treatment CO2 concentrations or in controlled-environment ...