Paper · 1991 · Photochemistry and Photobiology

SIMULTANEOUS SATURATION OF VARIABLE FLUORESCENCE YIELD AND PHOTOACOUSTICALLY MONITORED THERMAL EMISSION IN THYLAKOID MEMBRANES

ROBERT CARPENTIER; THOMAS G. OWENS; ROGER M. LEBLANC

4
claims
6
verbatim quotes
11
citations
1
research areas
—
Not open access

Abstract

Abstract— Thermal and fluorescence emission from thylakoid membranes were monitored simultaneously in a photoacoustic cell. A close relationship existing between variable fluorescence and variable thermal emissions is demonstrated. The modulated measuring beam of the photoacoustic spectrophotometer was used to study the effect of light intensity on the energy storage yield and on the variable fluorescence yield. The half‐saturation light intensities obtained for both parameters were 8.5 and 9.1 W m −2 , respectively. The similar sensitivity of energy storage and variable fluorescence yield to light intensity indicates that electron transfer with plastoquinone as last acceptor is probably responsible for the photoacoustically monitored energy storage.

Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 4

Associationobservedoriginal resultmeasured

Claim · model-written summary

Variable fluorescence and variable thermal emission were closely related.

Outcome
variable thermal emissionse0
Comparator
variable fluorescencee0

Not reportedTaxonDirection

Verbatim

e0

“A close relationship existing between variable fluorescence and variable thermal emissions is demonstrated.”

✓ located verbatim in the source · abstract, characters 124–231 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Energy storage yield had a half-saturation light intensity of 8.5 W m −2.

Outcome
half‐saturation light intensitiese0
Value
8.5 and 9.1 W m −2e0
Qualifier
energy storage yielde1

Not reportedTaxon

Verbatim

e0

“The half‐saturation light intensities obtained for both parameters were 8.5 and 9.1 W m −2 , respectively.”

✓ located verbatim in the source · abstract, characters 416–522 · show in text ↑
e1

“energy storage yield and on the variable fluorescence yield”

✓ located verbatim in the source · abstract, characters 355–414 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Variable fluorescence yield had a half-saturation light intensity of 9.1 W m −2.

Outcome
half‐saturation light intensitiese0
Value
8.5 and 9.1 W m −2e0
Qualifier
variable fluorescence yielde1

Not reportedTaxon

Verbatim

e0

“The half‐saturation light intensities obtained for both parameters were 8.5 and 9.1 W m −2 , respectively.”

✓ located verbatim in the source · abstract, characters 416–522 · show in text ↑
e1

“energy storage yield and on the variable fluorescence yield”

✓ located verbatim in the source · abstract, characters 355–414 · show in text ↑
Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

Similar light sensitivity suggests electron transfer with plastoquinone as final acceptor causes monitored energy storage.

Compound
plastoquinonee0
Outcome
photoacoustically monitored energy storagee0
Qualifier
electron transfer with plastoquinone as last acceptore0

Not reportedTaxon

Verbatim

e0

“The similar sensitivity of energy storage and variable fluorescence yield to light intensity indicates that electron transfer with plastoquinone as last acceptor is probably responsible for the photoacoustically monitored energy storage.”

✓ located verbatim in the source · abstract, characters 523–760 · show in text ↑