Laser-induced chlorophyll fluorescence induction kinetics of metal-stressed and nonstressed Norway spruce needles for forest damage assessment

Cliff Banninger; Guido Schmuck

doi:10.1117/12.138547

17 December 1992 Laser-induced chlorophyll fluorescence induction kinetics of metal-stressed and nonstressed Norway spruce needles for forest damage assessment

Cliff Banninger, Guido Schmuck

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Proceedings Volume 1714, Lidar for Remote Sensing; (1992) https://doi.org/10.1117/12.138547
Event: Environmental Sensing '92, 1992, Berlin, Germany

Abstract

Damaged spruce needles showed a smaller rise from ground level fluorescence (Fo) to maximum fluorescence (Fm) of the fast component of the Kautsky effect and a corresponding smaller decline (Fd) to the steady state fluorescence (Fs) of the slow component of the Kautsky effect relative to healthy needles. Fm/Fo and (Fm - Fs)/Fs or RFd derived photosynthesis indices were also correspondingly lower for metal-stressed versus nonstressed needles, and indicate a disfunctioning of the photosynthetic apparatus in the damaged needles and a consequent decrease in their photosynthetic capacity. A strong linear relationship occurs between the Fm/Fo indices of the fast component of the Kautsky effect and needle chlorophyll a content, although less strong relationships occur with respect to chlorophyll b and a + b contents, as well as between the RFd indices of the slow component of the Kautsky effect ad needle chlorophyll a, b, and a + b contents. The possibility exists to utilize chlorophyll fluorescence induction kinetics as a fast and reliable means to predict the chlorophyll content of plant foliage, in addition to providing an indicator of plant vitality.

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Cliff Banninger and Guido Schmuck "Laser-induced chlorophyll fluorescence induction kinetics of metal-stressed and nonstressed Norway spruce needles for forest damage assessment", Proc. SPIE 1714, Lidar for Remote Sensing, (17 December 1992); https://doi.org/10.1117/12.138547

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