Pa-101 高圧環境が植物に与える影響(第1報)光合成活性に与えるCO_2分圧および湿度の影響(1.資源,ポスターセッション1)

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The aim of this study is to investigate the effects of artificially controlled environment, especially elevated pressure, on the photosynthesis and respiration during plants growth. The pressure affects not only cells and organelles in leaves directly but also diffusion coefficients and degrees of solubility of carbon dioxide and oxygen. In this study, photosynthesis of a model plant, Arabidopsis thaliana, was investigated under elevated pressure in a chamber made of acrylic and aluminium. Fluorescent lamps were set up around the chamber as the light sources. The photon flux density (PFD) for the plant was able to be changed from 0 to 70 μmol/m^2s. The pressure and absolute humidity were varied from 0.1 to 0.5 MPa and from 0.78 ×10^<-2> to 13 ×10^<-2> kg/kg', respectively. The effects of elevated pressure on the photosynthesis were analyzed by measuring a change in the amount of carbon dioxide in the chamber. The results clearly showed that the amount of photosynthesis increases up to 1.5 times with increasing pressure. The results indicate that the photosynthesis during plant growth is improved under elevated pressure. There are possibilities that the obtained results are applicable to cultivate biomass more efficiently in plant factories in the future.
2012-12-25