Abstract
The photoacoustic frequency spectrum under steady-state conditions from Philodendron green leaves attached to the plant was measured in the 0.2–200 Hz frequency range. The PA amplitude spectrum showed a maximum at low frequency (around 1 Hz) which was attributed to an optimum frequency for oxygen evolution. The signal decreased at a lower frequency, where the oxygen or carbondioxide uptake starts to become important. Efficiency of the oxygen evolution as a function of excitation light intensity was determined for different levels of background light.
References
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Frandas, A., Jalink, H. & van der Schoor, R. Low frequency photoacoustics for monitoring the photobaric component in vivo of green leaves. Photosynthesis Research 52, 65–67 (1997). https://doi.org/10.1023/A:1005805420477
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DOI: https://doi.org/10.1023/A:1005805420477