| 要旨トップ | 目次 | 日本生態学会第63回全国大会 (2016年3月、仙台) 講演要旨
ESJ63 Abstract


一般講演(ポスター発表) P2-088 (Poster presentation)

Does plants growing in semi-arid grasslands have high resistance to air pollution damage?

*Shimizu, H. (NIES), An, P. (ALRC, Tottori Univ.), Zheng, Y.R. (Inst. Bot., CAS), Xu, Z.Z. (Inst. Bot., CAS), Chen, L.J. (Inst. Appl. Ecol., CAS), Gao, Y. (Inner Mongolia Agri. Univ.), Zou, C.J. (East China Normal Univ.), Qiu, G.Y. (Peking Univ.), Yu, Y.J. (SCIES, MEP)

Not only land use change, overgrazing and global warming, but also ozone increase induced by industrial development and automobile spread should be considered to conserve semi-arid grasslands of Northeast China. Model simulations showed that grasslands close to Beijing have suffered severe ozone exposures (ca. 50ppb). Plants growing there usually have high viability against water deficiency with closing stomata, which is to imagine the high resistance against air pollution. Then, we exposed ca. 50ppb ozone (20-100ppb) for 4 weeks in the environment-controlled growth cabinets (25°C, 55% RH in 14-h light period; 20°C, 75% RH in 10-h dark period) to evaluate the ozone impacts. Different species responded differently to ozone. Typical visible foliar injuries appeared in some, and growth reductions were induced in many species. Decrease in NAR, increase in LAR and SLA and lowering in root/shoot ratio were caused in some ozone-exposed plants. More quantitative studies on the long-term combined impacts of ozone and water stresses are necessary for conserving these semi-arid grasslands.


日本生態学会