Studer Abiven Malenovský
Fakultäten » Mathematisch-naturwissenschaftliche Fakultät » Geographisches Institut » Physische Geographie » Prof. Dr. Michael W. I. Schmidt » Studer Abiven Malenovský
Current research project
| Title / Titel | Light Use efficiency eXperiment – LUX: Testing ability of the xantophyll transformation sensitive optical indices to track dynamic of plant photosynthesis in various illumination and temperature conditions | ||||||
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| Abstract (PDF, 14 KB) | |||||||
| Summary / Zusammenfassung | At the level of single plant leaf, the photochemical reflectance index (PRI) was proposed as an optical indicator of photosynthetic radiation use efficiency (Gamon et al., 1997). PRI, calculated as optical index of single bands at 531 and 570 nm (R531 - R570)/ (R531 + R570), was connected to the photoprotective transformation of xantophyll foliar pigments that regulates photosynthesis via thermal dissipation of excess light energy. Currently, the relationship between PRI and photosynthesis was shown to be inconsistent when measured at the level of whole canopy (disturbance of canopy structural effects) and in longer time period (disturbance of temporal changes in leaf chlorophyll content). Since the plant xanthophylls’ photoprotective processes are being expressed in a broader wavelength range between c. 505-550 nm, there is a potential to exchange PRI by more robust optical indices taking into account the continuum of the spectral signature rather than the single spectral bands (Malenovský et al., 2006). Therefore, the objectives of this InnoPool proof-of-concept project are: 1/ to propose a proper design of the xantophyll transformation sensitive optical indices based on the continuum removal transformation of plant reflectance signal between 505-550 nm, 2/ to test their ability to track the photosynthetic activity of the small tree canopy under various illumination and temperature conditions in the controlled environment of the multi-labelling isotopes chambers (MICE). |
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| Keywords / Suchbegriffe | Photosynthesis, plant-soil interactions | ||||||
| Project leadership and contacts / Projektleitung und Kontakte |
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| Funding source(s) / Unterstützt durch |
Universität Zürich (position pursuing an academic career) |
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| Duration of Project / Projektdauer | Jul 2011 to Dec 2013 |