Optics and Spectroscopy

, Volume 112, Issue 2, pp 271–279

Water stress assessment of cork oak leaves and maritime pine needles based on LIF spectra


  • A. Lavrov
    • INOV-Inesc-Inovação
    • Institute of Material and Surface Science and Engineering
    • INOV-Inesc-Inovação
    • Institute of Material and Surface Science and Engineering
  • J. Marques da Silva
    • Faculty of Science, Department of Plant Biology and BioFIGUniversity of Lisbon
  • Rui Vilar
    • Institute of Material and Surface Science and Engineering
    • Department of Chemical and Biological EngineeringInstituto Superior Técnico
  • N. M. Santos
    • INOV-Inesc-Inovação
  • B. Alves
    • INOV-Inesc-Inovação
Nonlinear and Quantum Optics

DOI: 10.1134/S0030400X12020166

Cite this article as:
Lavrov, A., Utkin, A.B., Marques da Silva, J. et al. Opt. Spectrosc. (2012) 112: 271. doi:10.1134/S0030400X12020166


The aim of the present work was to develop a method for the remote assessment of the impact of fire and drought stress on Mediterranean forest species such as the cork oak (Quercus suber) and maritime pine (Pinus pinaster). The proposed method is based on laser induced fluorescence (LIF): chlorophyll fluorescence is remotely excited by frequency-doubled YAG:Nd laser radiation pulses and collected and analyzed using a telescope and a gated high sensitivity spectrometer. The plant health criterion used is based on the I685/I740 ratio value, calculated from the fluorescence spectra. The method was benchmarked by comparing the results achieved with those obtained by conventional, continuous excitation fluorometric method and water loss gravimetric measurements. The results obtained with both methods show a strong correlation between them and with the weight-loss measurements, showing that the proposed method is suitable for fire and drought impact assessment on these two species.

Copyright information

© Pleiades Publishing, Ltd. 2012