16 May 2007 Optical principle of pH measurement for detection of auxin flow through cellular membrane
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Abstract
The paper shows an approach to the determination of pH changes of solutions with a fine spatial resolution by means of fiber-optic tapers and fluorescence detection. This approach can be adopted for the determination of auxin flow through celluar membranes. Spectral absorption and fluorescence of pH transducers, namely of fluorescein, carboxyfluorescein, 6,8-dihydroxy-1,3-pyrenedisulfonic acid disodium salt and 2',7'-bis(2-carbonylethyl)-5(6)-carboxyfluorescein, were tested. The approach, based on the determination of a shift of the maxima of their fluorescence peaks, was employed for processing the measured fluorescence data in bulk solutions. Suitable tapered fiber probes were prepared and in vitro demonstrated for pH monitoring in a pH range from 6 to 7.
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Ondrej Podrazky, Ondrej Podrazky, Jan Mrazek, Jan Mrazek, Miroslav Seidl, Miroslav Seidl, Ivan Kasik, Ivan Kasik, Petr Tobiska, Petr Tobiska, Vlastimil Matejec, Vlastimil Matejec, Tomas Martan, Tomas Martan, Jan Aubrecht, Jan Aubrecht, } "Optical principle of pH measurement for detection of auxin flow through cellular membrane", Proc. SPIE 6585, Optical Sensing Technology and Applications, 65850Y (16 May 2007); doi: 10.1117/12.722924; https://doi.org/10.1117/12.722924
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