LOW-FREQUENCY PHOTOACOUSTICS FOR MONITORING THE PHOTOBARIC COMPONENT IN-VIVO OF GREEN LEAVES

Authors
FRANDAS A JALINK H VANDERSCHOOR R
Citation
A. Frandas et al., LOW-FREQUENCY PHOTOACOUSTICS FOR MONITORING THE PHOTOBARIC COMPONENT IN-VIVO OF GREEN LEAVES, Photosynthesis research, 52(1), 1997, pp. 65-67
Citations number
9
Categorie Soggetti
Plant Sciences
Journal title
Photosynthesis research → ACNP
ISSN journal
01668595
Volume
52
Issue
1
Year of publication
1997
Pages
65 - 67
Database
ISI
SICI code
0166-8595(1997)52:1<65:LPFMTP>2.0.ZU;2-Y
Abstract
The photoacoustic frequency spectrum under steady-state conditions fro m 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 fre quency 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.