Abstract
The Laser-PAM described in this paper is an adaptation of the PAM 101 fluorometer (Heinz Walz, Effeltrich, Germany) designed for remote sensing and non-invasive laboratory measurements of chlorophyll fluorescence. It is based on a 5 mW laser diode, emitting at 638 nm, and a Fresnel lens coupled to the ED-101 detection unit. Due to these modifications, measurements can be performed at a distance ranging from 0.3 to 2 m. The ED-101 detection unit has been modified to perform simultaneous measurements of both modulated fluorescence and light reflected by the leaf. Reflected light showed a good estimation of the photosynthetically active radiation measured exactly at the same area as the fluorescence. A particular advantage of the Laser-PAM fluorometer is its suitability for remote measurements under field conditions. Simultaneous fluorescence and gas-exchange measurements, performed on grapevine leaves, are reported as an example of an application for the Laser-PAM.
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Agati G, Cerovic ZG and Moya I (2000) The effect of decreasing temperature up to chilling values on the in vivo F685/F735 chlorophyll fluorescence ratio in Phaseolus vulgaris and Pisum sativum: The role of the Photosystem I contribution to the 735 nm fluorescence band. Photochem Photobiol: 72: 75–84
Cerovic ZG, Goulas Y, Gorbunov M, Briantais J-M, Camenen L and Moya I (1996) Fluorosensing of water stress in plants. Diurnal changes of the mean lifetime and yield of chlorophyll fluorescence measured simultaneously and at distance with a τ-LIDAR and a modified PAM-fluorimeter, in maize, sugar beet and Kalanchoë. Remote Sens Environ 58: 311–321
Cerovic ZG, Samson G, Morales F, Tremblay N and Moya I (1999) Ultraviolet-induced fluorescence for plant monitoring: Present state and prospects. Agronomie 19: 543–578
Cornic G and Ghashghaie J (1991) Effect of temperature on net CO2 assimilation and Photosystem II quantum yield of electron transfer of French bean (Phaseolus vulgaris L.) leaves during drought stress. Planta 185: 255–260
Escalona JM, Flexas J and Medrano H (1999) Stomatal and nonstomatal limitations of photosynthesis under water stress in fieldgrown grapevines. Aust J Plant Physiol 26: 421–433
Flexas J (2000) Regulacion de los procesos fotosintéticos en respuesta a la sequia en hojas de Vitis vinifera L., Phd thesis, Universitat de les Illes Balears
Flexas J, Briantais JM, Cerovic Z, Medrano H and Moya I (2000) Steady-state and maximum chlorophyll fluorescence responses to water stress in grapevine leaves: A new remote sensing system. Remote Sens Environ 73: 283–297
Foyer CH, Furbank R, Harbinson J and Horton P (1990) The mechanisms contributing to photosynthetic control of electron transport by carbon assimilation in leaves. Photosynth Res 25: 83–100
Genty B, Wonders J and Baker NR (1990) Non-photochemical quenching of Fo in leaves is emission wavelength dependent: Consequences for quenching analysis and its interpretation. Photosynth Res 26: 133–139
Mohammed GH, Binder WD and Gillies SL (1995) Chlorophyll fluorescence: A review of its practical forestry applications and instrumentation. Scand J For Res 10: 383–410
Osmond CB, Kramer D and Lüttge U (1999) Reversible water stress-induced non-uniform chlorophyll fluorescence quenching in wilting leaves of Potentilla reptans may not be due to patchy stomatal responses. Plant Biol 1: 618–624
Pfundel E (1998) Estimating the contribution of Photosystem I to total leaf chlorophyll fluorescence. Photosynth Res 56: 185–195
Quick WP, Chaves MM, Wendler R, David M, Rodrigues ML, Passaharinho JA, Pereira JS, Adcock MD, Leegood RC and Stitt M (1992) The effect of water stress on photosynthetic carbon metabolism in four species grown under field conditions. Plant Cell Environ 15: 25–35
Schreiber U (1986) Detection of rapid induction kinetics with a new type of high-frequency modulated chlorophyll fluorimeter. Photosynth Res 9: 261–272
Schreiber U and Bilger W (1993) Progress in chlorophyll fluorescence research: major developments during the past years in retrospect. In: Progress in Botany, pp 151–173. Springer-Verlag, Berlin, Heidelberg
Schreiber U, Schliwa U and Bilger W (1986) Continuous recording of photochemical and non-photochemical chlorophyll fluorescence quenching with a new type of modulation fluorimeter. Photosynth Res 10: 51–62
Ting CS and Owens TG (1992) Limitations of the Pulse-modulated technique for measuring the fluorescence characteristics of algae. Plant Physiol 100: 367–373
Von Caemmerer S and Farquhar GD (1981) Some relationships between the biochemistry of photosynthesis and the gas exchange of leaves. Planta 153: 376–385
Wong S-C, Cowan IR and Farquar GD (1979) Stomatal conductance correlates with photosynthetic capacity. Nature 282: 424–426
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Ounis, A., Evain, S., Flexas, J. et al. Adaptation of a PAM-fluorometer for remote sensing of chlorophyll fluorescence. Photosynthesis Research 68, 113–120 (2001). https://doi.org/10.1023/A:1011843131298
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DOI: https://doi.org/10.1023/A:1011843131298