Delayed Fluorescence and Phosphorescence of Plant Pigments

Krasnovsky, А.А.

doi:10.1111/j.1751-1097.1982.tb09497.x

Cited by 65 publications

(36 citation statements)

References 58 publications

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“…Similar data with singlet quenchers were also published by Tyystjarvy et al [8]. During the greening of etiolated leaves high levels of Chl triplets have been detected [9,10] and Carspi et al [11] have shown that singlet oxygen is also formed. This suggests the involvement of pigment^protein complexes in which Chl^Car coupling for triplet transfer is not correctly established during synthesis.…”

Section: Introductionsupporting

confidence: 83%

Involvement of uncoupled antenna chlorophylls in photoinhibition in thylakoids

et al. 2001

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Section: Introductionsupporting

confidence: 83%

Involvement of uncoupled antenna chlorophylls in photoinhibition in thylakoids

et al. 2001

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“…0.3 [8,18,20]. With the energy of 3P680* of 1.3 eV, as estimated from the wavelength of phosphorescence [35], this yields a lower limit of dG(P680'Pheo--P680) of 1.5 eV.…”

Section: Determination Of the Recombination Rates K And Kmentioning

confidence: 99%

Similarity of primary radical pair recombination in photosystem II and bacterial reaction centers

et al. 1993

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We report temperature and magnetic field dependent measurements of the recombination dynamics of the radical pair P680+Pheo-in D,D,cytbSSg reaction centers of photosystem II and compare the results to those obtained in bacterial reaction centers. In photosystem II the rate of recombination to the groundstate is found to be slower than in the bacterial reaction centers by a factor of at least 50. This difference arises from the different redox potentials of the pigments of plant and bacterial reaction centers. In contrast, the rate of recombination to the triplet state is similar in all reaction centers, indicating a similar electronic coupling which allows us to conclude upon the structural similarity.

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“…Van der Vos et al 1991;Carbonera et al 1992a, b;Groot et al 1994;Peterman et al 1995), due to triplettriplet energy transfer from the excited state of chlorophyll (Wolff and Witt 1969;Mathis et al 1979; Van der Vos et al 1991;Carbonera et al 1992aCarbonera et al , 1992bGroot et al 1994;Peterman et al 1995;Javorfi et al 2000). The (unquenched) triplet yield of chlorophyll is about 30% in vitro (Bowers and Porter 1967;Krasnowsky 1992). A comparable intersystem crossing rate has been estimated for Chl bound to photosynthetic complexes (Kramer and Mathis 1980;Schodel et al 1998).…”

Section: Introductionmentioning

confidence: 89%

“…Moreover carotenes play a central role in protecting the photosynthetic system from singlet oxygen by quenching of the potentially harmful triplet excited state of chlorophyll (i.e. Krasnowsky 1992). A significant carotenoid triplet population has been observed in several experimental conditions in thylakoids (Wolff and Witt 1969;Mathis et al 1979;Javorfi et al 2000), as well as in isolated photosystems (Mathis et al 1979) and in Chl binding complexes (e.g.…”

Section: Introductionmentioning

confidence: 99%

A Fluorescence Detected Magnetic Resonance Investigation of the Carotenoid Triplet States Associated with Photosystem II of Isolated Spinach Thylakoid Membranes

et al. 2005

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The carotenoid triplet populations associated with the fluorescence emission chlorophyll forms of Photosystem II have been investigated in isolated spinach thylakoid membranes by means of fluorescence detected magnetic resonance in zero field (FDMR). The spectra collected in the 680-690 nm emission range, have been fitted by a global analysis procedure. At least five different carotenoid triplet states coupled to the terminal emitting chlorophyll forms of PS II, peaking at 682 nm, 687 nm and 692 nm, have been characterised. The triplets associated with the outer antenna emission forms, at 682 nm, have zero field splitting parameters |D| = 0.0385 cm-1, |E| = 0.00367 cm-1; |D| = 0.0404 cm-1, |E| = 0.00379 cm-1 and |D| = 0.0386 cm-1, |E| = 0.00406 cm-1 which are very similar to those previously reported for the xanthophylls of the isolated LHC II complex. Therefore the FDMR spectra recorded in this work provide insights into the organisation of the LHC II complex in the unperturbed environment represented by thylakoid membranes. The additional carotenoid triplet populations, detected by monitoring the chlorophyll emission at 687 and 692 nm, are assigned to carotenoids bound to inner antenna complexes and hence attributed to beta-carotene molecules.

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Delayed Fluorescence and Phosphorescence of Plant Pigments

Cited by 65 publications

References 58 publications

Involvement of uncoupled antenna chlorophylls in photoinhibition in thylakoids

Involvement of uncoupled antenna chlorophylls in photoinhibition in thylakoids

Similarity of primary radical pair recombination in photosystem II and bacterial reaction centers

A Fluorescence Detected Magnetic Resonance Investigation of the Carotenoid Triplet States Associated with Photosystem II of Isolated Spinach Thylakoid Membranes

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