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Effects of elevated CO2 and O3 on modular growth of Ginkgo biloba.

XU Wen-duo1;FU Shi-lei2;HE Xing-yuan1;CHEN Wei1;ZHAO Gui-ling3;ZHOU Yuan3;WEN Hua1   

  1. 1Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;2School of Architecture and Urban Planning, Shenyang Jianzhu University, Shenyang 110168;3Shenyang Agricultural University, Shenyang 110161, China
  • Received:2007-12-03 Revised:1900-01-01 Online:2008-10-10 Published:2008-10-10

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Abstract: The study on the effects of elevated CO2 and O3 on the modular growth of Ginkgo biloba showed that elevated O3 inhibited the growth of axialand lateral shoots significantly (P<0.01), while elevated CO2 had no significant effects on the diameter growth of G. biloba (P>0.05). The diameter growth of G. biloba was inhibited significantly by elevated O3 and its combination with CO2 (P<0.01). Elevated CO2 increased the leaf area, dry matter accumulation, water content, and drought resistance; while the combination of elevated CO2 and O3 only increased the leaf dry matter accumulation significantly (P<0.01) but had less effects on leaf -area. Elevated O3 had significant inhibitory effects on the leaf modular growth of G. biloba, under which, the leaf area and dry matter accumulation decreased significantly (P<0.05), compared with the control.

Key words: Larix chinensis, Ecological plasticity, Cone, Seed