| Budget Amount *help |
¥16,510,000 (Direct Cost: ¥12,700,000、Indirect Cost: ¥3,810,000)
Fiscal Year 2015: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2013: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
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| Outline of Final Research Achievements |
To evaluate the physiological and morphological responses in clones of Japanese cedar (Cryptomeria japonica) to the future atmospheric environment, we investigated the effects of elevated CO2 and O3 concentrations on growth, photosynthesis and wood property in the seedlings of 6 clones of Japanese cedar grown under a free-air fumigation system. Total biomass including root biomass increased under elevated O3 across the 6 clones. Light-saturated photosynthetic rates measured under the growth CO2 conditions were significantly higher in the elevated-CO2-grown plants than the ambient-CO2-grown plants despite of O3 treatments. However, the maximum rates of Rubisco carboxylation decreased in the plants grown under elevated CO2. There were no significant effects of elevated CO2 and O3 on the density of wood, suggesting that both treatments might have little influence on the wood quality of Japanese cedar clones.
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