Chlorophyll Fluorescence: An Intrinsic Probe of Photosynthesis

Papageorgiou, George C.

doi:10.1016/b978-0-12-294350-8.50011-8

Cited by 413 publications

(276 citation statements)

References 187 publications

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“…It is assumed that each phase of the fluorescence kinetics corresponds to specific changes in the photosynthetic apparatus (Papageorgiou 1975, Lavorel & Etienne 1977, Prezelin 1981. Two phases are usually recognized in the fluorescence induction curves (the Kautsky effect).…”

Section: Introductionmentioning

confidence: 99%

“…Two phases are usually recognized in the fluorescence induction curves (the Kautsky effect). The fast phase (within the first second of exposure to bright light) is characterized by a rapid rise in fluorescence and is mainly associated with photochemical changes in photosystem I1 (Papageorgiou 1975). The slow phase does not appear to be directly linked to the photochemistry of photosynthesis and more likely reflects the distribution of excitation energy between the 2 photosystems (cf.…”

Section: Introductionmentioning

confidence: 99%

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An in vivo fluorescence method for the continuous in situ estimation of phytoplankton photosynthetic characteristics

Demers¹,

Therriault²,

Legendre³

et al. 1985

Mar. Ecol. Prog. Ser.

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This study proposes a simple method to continuously measure, in situ, an in vivo fluorescence characteristic of a natural phytoplankton population, using 2 flow-through fluorometers and a strong light source. By this method, phytoplankton fluorescence before (F,) and after (F,) strong illumination (2250 ~E i n m-2 S-') was measured simultaneously with parameters of the photosynthesis vs irradiance curves. Data from 3 depths in the mixed layer, at 3 stations in the St. Lawrence Estuary, showed a strong relation between the ratio FA/FB and the photosynthetic parameters aB, Pi,,, I, and I, . The relation was particularly good with I, and I,, 2 possible indices of physiological adaptation. These results suggest that the ratio F,/FB can be used as an instantaneous in vivo index of photosynthetic characteristics. This simple measurement might prove useful for continuous spatio-temporal investigations of phytoplankton responses to their light environment in the water column.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An in vivo fluorescence method for the continuous in situ estimation of phytoplankton photosynthetic characteristics

Demers¹,

Therriault²,

Legendre³

et al. 1985

Mar. Ecol. Prog. Ser.

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“…The initial rapid rise in fluorescence yield is seen in both wild type and viridis-M 4, the maximum intensity being attained within the first second of exposure (Figure 3). The wild type fluorescence then declines, a second peak of fluorescence occurs after about 4 sec, and the fluorescence declines again to eventually reach a steady state fluore- ( 10,20). Q is in the oxidized state in dark-adapted leaves but is reduced by photosystem II during the first few seconds of irradiation, which causes chlorophyll fluorescence to rise during this period as the quenching effect is overcome.…”

Section: Kineticsmentioning

confidence: 99%

“…The intensity of this chlorophyll fluorescence is correlated with photosynthetic electron transfer activity and chlorophyll fluorescence is frequently employed as a means of studying photosynthetic mechanisms (for reviews see refs. 2,10,20).…”

Section: Introductionmentioning

confidence: 99%

Chlorophyll fluorescence photography to detect mutants, chilling injury and heat stress

Gibbons

Smillie

1980

Carlsberg Res. Commun.

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Chlorophyll fluorescence photography with high speed colour film has been used to examine: (i) kinetics of the rise and fall of variable fluorescence in barley leaves, (ii) detection of high fluorescing mendelian and maternally inherited mutants of barley, (iii) detection of protochlorophyllide-deflcient and protochlorophyllideaccumulating mutants of barley, (iv) heat stress by photographing the increase of initial fluorescence in heated leaves, and (v) decrease in variable fluorescence in leaves of peanut, tomato and tomato-potato somatic hybrids associated with the development of chilling injury. Filter combinations and a light source for photographing chlorophyll fluorescence are described. The relative intensity and kinetics of the fluorescence from the plants photographed was also measured, so that this could be correlated with fluorescence as detected by photography, and to facilitate the determination of optimal conditions for fluorescence photography.Abbreviations: Fo = initial fluorescence; Fv = variable fluorescence; Fs = steady state fluorescence.

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“…I looked at both. Fluorescence is a signature of photosynthesis (see chapters by and others in Papageorgiou and Govindjee 2004). If I did not understand fluorescence, I had to conclude that I did not understand photosynthesis.…”

Section: From Wü Rzburg To Namibia and New Zealandmentioning

confidence: 99%

From horse thief to professor: confessions of a plant physiologist

Heber

2012

Photosynth Res

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Can 50 years of research, performed between ignorance and the wish to know, and executed between hope, despair, satisfaction and pain, be compressed into an abstract? What has been done in more than 50 years may be expressed in four words: it was worth it. If I had another life, I would do it again. In the beginning of my career, life was an enigma. It still is. Molecular details of the workings of life had been largely unknown when I began. Now, at the end, I still wish to know details: how is light, master of life, manipulated to either support life, when photosynthesis is possible, or to protect it when light endangers it. What is the molecular and the physical nature of the biological mechanisms which control both, energy conservation and energy dissipation, in photosynthesis?

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Chlorophyll Fluorescence: An Intrinsic Probe of Photosynthesis

Cited by 413 publications

References 187 publications

An in vivo fluorescence method for the continuous in situ estimation of phytoplankton photosynthetic characteristics

An in vivo fluorescence method for the continuous in situ estimation of phytoplankton photosynthetic characteristics

Chlorophyll fluorescence photography to detect mutants, chilling injury and heat stress

From horse thief to professor: confessions of a plant physiologist

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