Preservation of photosynthetic electron transport from senescence-induced inactivation in primary leaves after decapitation and defoliation of bean plants

Yordanov, Ivan; Goltsev, Vasilij; Stefanov, D.; Chernev, Petko; Zaharieva, Ivelina; Kirova, Maria; Gecheva, Velichka; Strasser, Reto J.

doi:10.1016/j.jplph.2008.05.003

Cited by 42 publications

(31 citation statements)

References 36 publications

(31 reference statements)

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“…4). Recent experiments with bean leaves revealed a similar down-regulation of PSII activity during natural senescence due to PSII reaction centers inactivation which preceded the degradation of antenna complexes (Yordanov et al 2008).…”

Section: Discussionmentioning

confidence: 89%

“…The PSI activity was estimated directly by the changes in the DA 830 leaf absorbance as well as by the recently introduced JIP-test parameter u R 0 representing the quantum yield of electron transport from Q A -to the PSI end electron acceptors (Tsimilli-Michael and Strasser 2008;Smit et al 2008). Recently, a correlation between the changes in DA 830 leaf absorbance and u R 0 in decapitated and defoliated bean plants was found (Yordanov et al 2008). In the present study, these two different experimental approaches also demonstrated a good correlation (Figs.…”

Section: Discussionmentioning

confidence: 99%

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Different effects of dark treatment on pigment composition and photosystem I and II activities in intact cotyledons and primary leaves of Cucurbita pepo (zucchini)

et al. 2008

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Darkness mediates different senescencerelated responses depending on the targeting of dark treatment (whole plants or individual leaves) and the organs that perceive the signal (leaves or cotyledons). In this study, we presented data on the differential effects of 2-day dark treatment on progression of senescence in cotyledons and primary leaves of 14-day-old plants of Cucurbita pepo L. (zucchini). The lack of changes in chlorophyll a, chlorophyll b and carotenoid contents as well as in the PSI activity measured by the far-red induced alterations in the P 700 oxidation levels and the quantum yield of electron transport from Q A -to PSI end acceptors (u R 0 ) indicated higher resistance of cotyledons to the applied dark stress compared to the primary leaves. In contrast to cotyledons, PSI activity in the primary leaves was significantly inhibited. Concerning the activity of PSII analyzed by the changes in the JIPtest parameters (the maximal efficiency of PSII photochemistry, u P 0 ; the performance index, PI ABS ; the efficiency of Q A -reoxidation, w 0 and the effective dissipation per reaction center, DI 0 /RC), no differences were observed between cotyledons and primary leaves, thus suggesting that PSI activity in the true leaves was more susceptible to the applied dark stress. The transfer of the darkened plants to normal light regime resulted in delayed senescence in cotyledons which was in contrast to results on Arabidopsis, thus implying the existence of specific mechanisms of cotyledon senescence in different monocarpic plants.Keywords Dark-induced senescence and recovery Á Cotyledons and primary leaves Á PSII and PSI activity Á JIP-test Abbreviations PSA Photosynthetic apparatus PSI Photosystem I PSII Photosystem II RC PSII reaction center Chl

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Different effects of dark treatment on pigment composition and photosystem I and II activities in intact cotyledons and primary leaves of Cucurbita pepo (zucchini)

et al. 2008

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“…Using a suitable experimental approach, DF has already been used for the analysis of the effects of chemical and physical factors: high and low temperatures (Itoh 1980;Goltsev et al 1987;Yordanov et al 1987;Bilger and Schreiber 1990), light stress (Valikhanov et al 2002) and UV irradiation (Zhang et al 2007a), drought and high salinity (Mladenova et al 1998;Zhang and Xing 2008), herbicides (Lambrev and Goltsev 2001), heavy metals (Plekhanov and Chemeris 2003), harmful gases (Ellenson and Amundson 1982). The ms DF can also be used to monitor effects of viral and bacterial diseases on plants (Milanov et al 1997;Christov et al 2001), and even to a change in the physiological state of the plant cell during its ontogenetic development, greening and different hormonal levels (Srivastava et al 1999;Zhang et al 2007b;Yordanov et al 2008).…”

Section: Relationship Between Prompt and Delayed Fluorescencementioning

confidence: 99%

Delayed fluorescence in photosynthesis

et al. 2009

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Photosynthesis is a very efficient photochemical process. Nevertheless, plants emit some of the absorbed energy as light quanta. This luminescence is emitted, predominantly, by excited chlorophyll a molecules in the light-harvesting antenna, associated with Photosystem II (PS II) reaction centers. The emission that occurs before the utilization of the excitation energy in the primary photochemical reaction is called prompt fluorescence. Light emission can also be observed from repopulated excited chlorophylls as a result of recombination of the charge pairs. In this case, some time-dependent redox reactions occur before the excitation of the chlorophyll. This delays the light emission and provides the name for this phenomenon-delayed fluorescence (DF), or delayed light emission (DLE). The DF intensity is a decreasing polyphasic function of the time after illumination, which reflects the kinetics of electron transport reactions both on the (electron) donor and the (electron) acceptor sides of PS II. Two main experimental approaches are used for DF measurements: (a) recording of the DF decay in the dark after a single turnover flash or after continuous light excitation and (b) recording of the DF intensity during light adaptation of the photosynthesizing samples (induction curves), following a period of darkness. In this paper we review historical data on DF research and recent advances in the understanding of the relation between the delayed fluorescence and specific reactions in PS II. An experimental method for simultaneous recording of the induction transients of prompt and delayed chlorophyll fluorescence and decay curves of DF in the millisecond time domain is discussed.

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“…In recent years, chlorophyll a fluorescence transient (O-J-I-P) has become one of the most popular tools in photosynthesis research, and especially to study PSII behavior (Force et al, 2003;Jiang et al, 2003;van Heerden et al, 2004;Albert et al, 2005;Tóth et al, 2005aTóth et al, , 2007Ilík et al, 2006;Lazár, 2006;Strauss et al, 2007;Chen et al, 2008;Yordanov et al, 2008). The shape of O-J-I-P transient is very sensitive to environmental stresses, and in particular to high temperature (Srivastava et al, 1997;Strasser, 1997;Lu et al, 2003;Tóth et al, 2005a;Chen et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous behavior of PSII in soybean (Glycine max) leaves with identical PSII photochemistry efficiency under different high temperature treatments

Cheng

Gao

et al. 2009

Journal of Plant Physiology

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Preservation of photosynthetic electron transport from senescence-induced inactivation in primary leaves after decapitation and defoliation of bean plants

Cited by 42 publications

References 36 publications

Different effects of dark treatment on pigment composition and photosystem I and II activities in intact cotyledons and primary leaves of Cucurbita pepo (zucchini)

Different effects of dark treatment on pigment composition and photosystem I and II activities in intact cotyledons and primary leaves of Cucurbita pepo (zucchini)

Delayed fluorescence in photosynthesis

Heterogeneous behavior of PSII in soybean (Glycine max) leaves with identical PSII photochemistry efficiency under different high temperature treatments

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