Abstract：
:The aim of this study is to investigate the effects of an artificially controlled environment, particularly elevated total pressure, on net photosynthesis and respiration during plant growth. Pressure directly affects not only cells and organelles in leaves but also the diffusion coefficients and degrees of solubility of CO2 and O2. In this study, the effects of elevated total pressure on the rates of net photosynthesis and respiration of a model plant, Arabidopsis thaliana, were investigated in a chamber that newly developed in this study to control the total pressure. The results clearly showed that the rate of respiration decreased linearly with increasing total pressure at a high humidity. The rate of respiration decreased linearly with increasing total pressure up to 0.2 MPa, and increased with increasing total pressure from 0.3 to 0.5 MPa at a low humidity. The rate of net photosynthesis decreased linearly with increasing total pressure under a constant partial pressure of CO2 at 40 Pa. On the other hand, the rate of net photosynthesis was clearly increased by up to 1.6-fold with increasing total pressure and partial pressure of CO2.
journal_name
J Biotechnoljournal_title
Journal of biotechnologyauthors
Takeishi H,Hayashi J,Okazawa A,Harada K,Hirata K,Kobayashi A,Akamatsu Fdoi
10.1016/j.jbiotec.2013.08.012subject
Has Abstractpub_date
2013-10-20 00:00:00pages
135-41issue
2eissn
0168-1656issn
1873-4863pii
S0168-1656(13)00351-9journal_volume
168pub_type
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