Photosynthesis induction in Eucalyptus urograndis seedlings and cuttings measured by Open Photoacoustics
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Undergraduate course
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Japan Soc Analytical Chemistry
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Article
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Abstract
In this work we study the photosynthetic induction in Eucalyptus urograndis leaves using the Open Photoacoustic Cell Technique. In vivo and in situ measurements were performed in leaves of four months-old E. urograndis seedlings and C041 cuttings previously dark-adapted for at least 10 h. Experimental results for the gas exchange component of the photoacoustic (PA) signal are interpreted considering that a gas uptake component would have a phase angle nearly opposite to that of the oxygen evolution component. Analysis of the photosynthetic induction data shows that seedlings present a net oxygen evolution before cuttings, but cuttings reach a higher steady-state photosynthetic activity.
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Keywords
open photoacoustic cell, photobaric signal, oxygen evolution, gas uptake, eucalyptus clone
Language
English
Citation
Analytical Sciences. Tokyo: Japan Soc Analytical Chemistry, v. 17, p. S555-S558, 2001.
