文献类型：期刊文献

英文题名：Adaptability of Indocalamus decorus to climate change based on physiological and biochemical responses to elevated carbon dioxide and ozone

作者：Guo, Ziwu[1] Zhuang, Minghao[2] Li, Yingchun[1] Chen, Shuanglin[1] Yang, Qingping[1]

第一作者：郭子武

通信作者：Guo, ZW[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Zhejiang, Peoples R China;[2]Peking Univ, Coll Environm Sci & Engn, Beijing 100871, Peoples R China

年份：2016

卷号：9

期号：APR2016

起止页码：311-317

外文期刊名：IFOREST-BIOGEOSCIENCES AND FORESTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000378114900001)】；

基金：The project was supported by the Natural Science Foundation of Zhejiang Province (No. LY13C160001) and by fundamental research funds for Central Non-Profit Research Institutes (No. RISF2014006).

语种：英文

外文关键词：Antioxidant Enzyme; Carbon Dioxide; Indocalamus decorus; Membrane Lipid Peroxidation; Ozone; Photosynthetic Physiology

摘要：Carbon dioxide (CO2) and ozone (O-3) are important greenhouse gases that contribute to global climate change. The effects of elevated CO2 and/or O-3 on plants remain unclear. Plant responses to mixtures of the two gases at high concentrations are likely to be complex. Previous studies have shown that the ability to tolerate elevated levels of the two gases varies among plant species; physiological adaptability in the face of changing atmospheric composition also differs among taxa. However, the effects of mixtures of the two greenhouse gases on the growth and physiology of bamboo are largely unexplored, even though bamboos are important vegetation elements throughout tropical and subtropical regions of the planet. In this study, we used open-topped chambers (OTC) to double the concentrations of atmospheric CO2 and O-3, and examined changes in membrane lipid peroxidation, photosynthetic physiology, and antioxidase activities in Indocalamus decorus leaves. After 103 days of treatment, elevated O-3 depressed net photosynthetic rate (Pn) without changing stomatal function, but caused no significant oxidative damage in the leaves. High levels of antioxidase activities were maintained in the leaves, indicating that this species had a strong tolerance to elevated O-3. Decreases in reactive oxygen content and antioxidase activity in the leaves highlighted the significant positive effects of elevated CO2 on photosynthesis in I. decorus. When a mixture of both gases was supplied at high concentrations, we detected no oxidative damage, although photosynthetic capacity was reduced. Negative effects of O-3 were very marked during the early part of the treatment period, but the effects of CO2 were positive. CO2 mitigated the oxidative damage caused by O-3 and promoted the growth of I. decorus. Thus, I. decorus tolerated the two greenhouse gases, and was able to adapt to elevated CO2 and O-3 levels. These findings contribute to the current knowledge base on the response of bamboo to global climate change.