2014 Fiscal Year Final Research Report
Measurement of leaf photosynthetic rate by analyzing dynamic change in chlorophyll fluorescence intensity induced by a pulsed pressure reduction
| Project/Area Number |
24688026
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Partial Multi-year Fund |
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| Research Field |
Agricultural information engineering
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| Research Institution | Ehime University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 画像計測 / 植物診断 / 光合成 / 環境応答 |
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| Outline of Final Research Achievements |
In our previous study, the pulsed pressure reduction induced chlorophyll fluorescence induction (PPR-CFI) measurement technique was developed. In this study, we applied the PPR-CFI to assess the leaf photosynthetic function under O2 and/or CO2 free conditions. The peak height, which is the extent of the chlorophyll fluorescence intensity increased just after the reduction of air pressure induced by a pulsed air pressure reduction (-80 kPa for 10 seconds), showed a strong correlation with the photosynthetic rate measured under several CO2 concentrations, but the correlation was disappeared under O2 free condition. In addition, the CO2 free condition, the net photosynthetic rate was zero, kept the electron transport rate (ΦPSII) at relatively higher level because of the photorespiration and alternative electron flow but strongly decreased the peak height. This result proved that the peak height measured by the PPR-CFI has high sensitivity to the photosynthetic rate.
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| Free Research Field |
植物診断計測工学
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