Chlorophyll fluorescence induction kinetics were used to assess different features of the photosynthetic system of trees affected by forest decline and of control trees. Several parameters can be derived from the kinetics: F_o and F_o', the initial fluorescence intensity and its initial slope, the maximum intensity F_p, and the final steady- state intensity F_s. Furthermore, the ratio R(t) of the two fluorescence components at 685 nm and 730 nm shows the initial value R_o, the minimum value R_m, and the steady- state value R_s. Measurements were carried out on spruce, birch, oak, and poplar. If one considers the variation of the parameters obtained from the different tree species and the effect on the parameters due to the forest decline, the parameters R_o and F_p/F_o exhibit a maximum capability to differentiate between control trees and those affected by forest decline.

Date Published: 17 December 1992
PDF: 12 pages
Proc. SPIE 1714, Lidar for Remote Sensing, (17 December 1992); doi: 10.1117/12.138510

Published in SPIE Proceedings Vol. 1714:
Lidar for Remote Sensing
Richard J. Becherer; Christian Werner, Editor(s)