2012 Fiscal Year Final Research Report
Dorsiventrality in stomatal responses to green light in bifacial leaves: Identification of green light receptor
| Project/Area Number |
23657029
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Plant molecular biology/Plant physiology
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2012
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| Keywords | 環境応答 / 気孔 |
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| Research Abstract |
The effects of changes in CO2 concentration (100 or 700 ppm) on stomatal responses in red or white light were examined microscopically in a leaf segment, an epidermal strip and an epidermal strip placed on a mesophyll segment of Commelina communis, all mounted on abuffer-containing gel. In both red and white light, stomata of the leaf segment opened/closed rapidly at low/high CO2. In red light, epidermal strip stomata barely responded to CO2. In white light, they opened at low CO2, but hardly closed at high CO2. Stomata of the epidermal strip placed on the mesophyll responded in the same manner as those on the leaf segment. We also confirmed that the apoplast transfer of ‘mesophyll signals’ and the stomatal opening at low CO2 are dependent on photosynthesis, whereas the stomatal closure at high CO2 is independent of photosynthesis. It is highly possible that productionof mesophyll signlas in the light depends on the wavelength.
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[Presentation] CO2 concentration and Rubisco kinetic parameters in the elevated CO2 world. Photosynthesis Research2011
Author(s)
Terashima, I., Okajima, Y., Mizokami, Y., Tazoe, Y., Yamori, W.
Organizer
forSustainablity-2011, Crescent Beach Hotel
Place of Presentation
Baku, Azerbaijan
Year and Date
2011-07-28
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