Elevated tropospheric ozone affects the concentration and allocation of mineral nutrients of two bamboo species.
The increase in tropospheric ozone (O3) affects plant physiology and ecosystem processes, and consequently the cycle of nutrients. While mineral nutrients are critical for plant growth, the effect of elevated tropospheric O3concentration on the uptake and allocation of mineral nutrients by plants is not well understood. Using open top chambers (OTCs), we investigated the effect of elevated O3on calcium (Ca), magnesium (Mg) and iron (Fe) in mature bamboo species Phyllostachys edulis and Oligostachyum lubricum. Our results showed that elevated O3decreased the leaf biomass of P. edulis and O. lubricum by 35.1% and 26.7%, respectively, but had no significant effect on the biomass of branches, stem or root. For P. edulis, elevated O3increased the nutrient (Ca, Mg and Fe) concentration and allocation in leaf but reduced the concentration in other organs. In contrast, elevated O3increased the nutrient concentration and allocation in the branch of O. lubricum but decreased that of other organs. We also found that that P. edulis and O. lubricum responded differently to elevated O3in terms of nutrient (Ca, Mg and Fe) uptake and allocation. This information is critical for nutrient management and adaptation strategies for sustainable growth of P. edulis and O. lubricum under global climate change.
College of Environmental Sciences and Engineering, Peking University, #5 Yiheyuan Road, Haidian District, Beijing 100871, PR China. Electronic address: zhuangminghao3@163.com.
Minghao
M
Zhuang
Crop and Soil Science Section, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Victoria 3010, Australia.
Shu Kee
SK
Lam
Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China.
Yingchun
Y
Li
Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China. Electronic address: cslbamboo@126.com.
Shuanglin
S
Chen
D001272:Atmosphere; D018533:Biomass; D057231:Climate Change; D008903:Minerals / Q000032:analysis*; D010126:Ozone / Q000032:analysis*; D018515:Plant Leaves; D006109:Poaceae / Q000737:chemistry*
D008903:Minerals; D010126:Ozone
Biomass; Ca; Elevated O(3); Fe; Mg; Oligostachyum lubricum; Phyllostachys edulis