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

Ziwu Guo (1), Minghao Zhuang (2), Yingchun Li (1), Shuanglin Chen (1)   , Qingping Yang (1)

iForest - Biogeosciences and Forestry, Volume 9, Issue 2, Pages 311-317 (2015)
doi: https://doi.org/10.3832/ifor1571-008
Published: Oct 22, 2015 - Copyright © 2015 SISEF

Research Articles


Carbon dioxide (CO2) and ozone (O3) are important greenhouse gases that contribute to global climate change. The effects of elevated CO2 and/or O3 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 (OTCs) to double the concentrations of atmospheric CO2 and O3, and examined changes in membrane lipid peroxidation, photosynthetic physiology, and antioxidase activities in Indocalamus decorus leaves. After 103 days of treatment, elevated O3 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 O3. 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 O3 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 O3 and promoted the growth of I. decorus. Thus, I. decorus tolerated the two greenhouse gases, and was able to adapt to elevated CO2 and O3 levels. These findings contribute to the current knowledge base on the response of bamboo to global climate change.

  Keywords


Antioxidant Enzyme, Carbon Dioxide, Indocalamus decorus, Membrane Lipid Peroxidation, Ozone, Photosynthetic Physiology

Authors’ address

(1)
Ziwu Guo
Yingchun Li
Shuanglin Chen
Qingping Yang
Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou Zhejiang, 311400 (P.R. China)
(2)
Minghao Zhuang
College of Environmental Sciences and Engineering, Peking University, Beijing 100871 (P.R. China)

Corresponding author

 
Shuanglin Chen
cslbamboo@126.com

Citation

Guo Z, Zhuang M, Li Y, Chen S, Yang Q (2015). Adaptability of Indocalamus decorus to climate change based on physiological and biochemical responses to elevated carbon dioxide and ozone. iForest 9: 311-317. - doi: 10.3832/ifor1571-008

Academic Editor

Silvano Fares

Paper history

Received: Jan 23, 2015
Accepted: Aug 18, 2015

First online: Oct 22, 2015
Publication Date: Apr 26, 2016
Publication Time: 2.17 months

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