Results 111 to 120 of about 13,743 (144)

Visualizing photosynthesis through processing of chlorophyll fluorescence images

SPIE Proceedings, 1990
Measurements of terrestrial plant photosynthesis frequently exploit sensing of gas exchange from leaves enclosed in gas-tight, climate controlled chambers. These methods are typically slow, and do not resolve variation in photosynthesis below the whole leaf level.
Paul F. Daley, J. Timothy Ball, Joseph A. Berry, Juergen Patzke, Klaus E. Raschke   +4 more
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Concurrent imaging of chlorophyll fluorescence, Chlorophyll a content and green fluorescent proteins‐like proteins of symbiotic cnidarians

Marine Ecology, 2014
AbstractResearch on photosynthetic cnidarians has been mainly focused on the symbiosis established between the cnidarian host and its dinoflagellates endosymbionts from genus Symbiodinium. Despite the potential of imaging techniques for assessing the spatial distribution of key parameters of cnidarian photobiology, such as photochemical activity ...
Leal, Miguel Costa, Jesus, Bruno, Ezequiel, João, Calado, Ricardo, Miranda Rocha, Rui Jorge, Cartaxana, Paulo, Serôdio, João   +6 more
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Confocal Fluorescence Lifetime Imaging of Chlorophyll Molecules in Polymer Matrices

Photochemistry and Photobiology, 1996
Abstract—Confocal fluorescence lifetime imaging has been used to establish the microscopic disposition of chlorophyll molecules in polymer matrices. This study provides a direct test of models proposed on the basis of fluorescence measurements on bulk Alms. We show that whereas chlorophyllbmolecules are uniformly distributed in nitrocellulose matrices,
Sanders, R., van Zandvoort, M.A.M.J., Draaijer, A., Levine, Y.K., Gerritsen, H.C.   +4 more
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Fluorescence Imaging of Photosynthetic Activity in Stressed Plants Via Chlorophyll Fluorescence

1998
Various stressors such as ozone and highly reactive oxygen species (1O2, O2-, OH, H2O2), air pollution gases (sulfur dioxide, NOX etc.), drought, heat and high-light stress as well as increased levels of UV-radiation will affect the chemical and pigment composition of leaves, their photosynthetic performance and modify their optical and fluorescence ...
Wenzel, Oliver, Lichtenthaler, Hartmut K.   +1 more
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Chlorophyll Fluorescence Imaging of Heavy Metal Treated Plants

1998
Chlorophyll fluorescence has been widely applied as a powerful non-invasive technique for in vivo analysis of plant stress (1,2). In vivo heavy metal stress has also been studied by means of chlorophyll fluorescence (3). In the last years a new approach, the two-dimensional image analysis of the fluorescence signal, has been found very promising.
Massimo Ciscato, Roland Valcke
openaire   +1 more source

Studying Plant Stress Reactions In Vivo by PAM Chlorophyll Fluorescence Imaging

2022
Plant photosynthetic and mitochondrial electron transfer chains (ETCs) are delicate environmental sensors and active players in stress acclimation. The performance of photosynthetic ETC can be deduced from chlorophyll a fluorescence. This makes chlorophyll fluorescence imaging a powerful tool to study plant stress in vivo.
Shapiguzov Alexey, Shapiguzov Alexey, Kangasjärvi Jaakko   +2 more
openaire   +4 more sources

The Chlorophyll Fluorescence Imaging Spectrometer (CFIS), mapping far red fluorescence from aircraft

Remote Sensing of Environment, 2018
The Chlorophyll Fluorescence Imaging Spectrometer (CFIS) is an airborne high resolution imaging spectrometer built at NASA's Jet Propulsion Laboratory (JPL) for evaluating solar-induced fluorescence (SIF) from the Orbiting Carbon Observatory-2 (OCO-2).
Christian Frankenberg, Philipp Köhler, Troy S. Magney, Sven Geier, Peter Lawson, Mark Schwochert, James McDuffie, Darren T. Drewry, Ryan Pavlick, Andreas Kuhnert   +9 more
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Quantitative Mapping of Leaf Photosynthesis Using Chlorophyll Fluorescence Imaging

Australian Journal of Plant Physiology, 1995
A method has been developed for routine, non-invasive monitoring of the topography of leaf photochemistry. The method uses video images of leaf chlorophyll fluorescence, taken during steady-state photosynthesis and during a transitory saturation of photochemistry, to construct, pixel by pixel, an image of the photochemical yield of photosystem II (PSII)
B Genty, S Meyer
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Plant phenotyping using chlorophyll fluorescence and multispectral imaging

2022
High-throughput phenotyping methodologies such as chlorophyll fluorescence and multispectral imaging represent tools for non-invasive quantification of plant performance in different environments. These techniques are widely used, from basic ecophysiological studies to applied research in crop breeding programs.
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Crop chlorophyll detection based on multiexcitation fluorescence imaging analysis

Biosystems Engineering, 2022
Guohui Liu, Nan Wang, Lulu An, Yang Liu, hong sun, Minzan Li, Weijie Tang, Ruomei Zhao, Lang Qiao   +8 more
openaire   +1 more source