Drought stress-induced upregulation of components involved in ferredoxin-dependent cyclic electron transfer

Lehtimäki, Nina; Lintala, Minna; Allahverdiyeva, Yagut; Aro, Eva‐Mari; Mulo, Paula

doi:10.1016/j.jplph.2010.02.006

Cited by 94 publications

(70 citation statements)

References 20 publications

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“…Analysis of P700 turnover also provided support for the hypothesis that CEF-PSI activity was exaggerated in PsFd1-expressing lines. The combination of lower DP700 max and higher P700 + reduction rates, as illustrated in Figure 8, Supplemental Figure S5, and Table IV, has been linked to increased CEF-PSI both in vivo and in vitro (Ivanov et al, 2006;Iwai et al, 2010;Lehtimäki et al, 2010). We detected no significant modifications in extrinsic and intrinsic protein components of PSI, PSII, and complex Cytb 6 f (Fig.…”

Section: Oefd1 Plants Have Decreased Lef and An Increase In Npq Mechamentioning

confidence: 60%

“…For example, in Arabidopsis, AtFd1 and AtFd2 represent about 10% and 90% of the total photosynthetic Fd pool, respectively (Hanke et al, 2004), and under low growth light, pea leaves express mainly PsFd2, while PsFd1 cannot be detected (Khristin and Akulova, 1976;Peltier et al, 2000). However, under conditions thought to stimulate CEF, such as drought or high light, transcripts of AtFd1, but not AtFd2 increase significantly (Lehtimäki et al, 2010), while PsFd1 becomes the most abundant isoprotein in pea leaves (Khristin and Akulova, 1976). Moreover, studies conducted with both knockout and knocked-down (RNA interference [RNAi]) Arabidopsis plants have suggested that the minor AtFd1 isoform might be primarily engaged in CEF-PSI, whereas AtFd2 is mainly responsible for LEF, although some redundancy in these functions has also been observed Voss et al, 2008).…”

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Expression of the Minor Isoform Pea Ferredoxin in Tobacco Alters Photosynthetic Electron Partitioning and Enhances Cyclic Electron Flow

et al. 2012

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(M.M., M.-R.H.) Ferredoxins (Fds) are ferrosulfoproteins that function as low-potential electron carriers in plants. The Fd family is composed of several isoforms that share high sequence homology but differ in functional characteristics. In leaves, at least two isoforms conduct linear and cyclic photosynthetic electron transport around photosystem I, and mounting evidence suggests the existence of at least partial division of duties between these isoforms. To evaluate the contribution of different kinds of Fds to the control of electron fluxes along the photosynthetic electron transport chain, we overexpressed a minor pea (Pisum sativum) Fd isoform (PsFd1) in tobacco (Nicotiana tabacum) plants. The transplastomic OeFd1 plants exhibited variegated leaves and retarded growth and developmental rates. Photosynthetic studies of these plants indicated a reduction in carbon dioxide assimilation rates, photosystem II photochemistry, and linear electron flow. However, the plants showed an increase in nonphotochemical quenching, better control of excitation pressure at photosystem II, and no evidence of photoinhibition, implying a better dynamic regulation to remove excess energy from the photosynthetic electron transport chain. Finally, analysis of P700 redox status during illumination confirmed that the minor pea Fd isoform promotes enhanced cyclic flow around photosystem I. The two novel features of this work are: (1) that Fd levels achieved in transplastomic plants promote an alternative electron partitioning even under greenhouse light growth conditions, a situation that is exacerbated at higher light intensity measurements; and (2) that an alternative, minor Fd isoform has been overexpressed in plants, giving new evidence of labor division among Fd isoforms.

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Section: Oefd1 Plants Have Decreased Lef and An Increase In Npq Mechamentioning

confidence: 60%

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confidence: 99%

Expression of the Minor Isoform Pea Ferredoxin in Tobacco Alters Photosynthetic Electron Partitioning and Enhances Cyclic Electron Flow

et al. 2012

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“…Therefore, we would expect an important contribution of cyclic electron transport (CET) in drought-stressed plants, as it was previously reported in numerous studies [18,27,28,50]. A reliable estimation of the rate of CET in PSI is problematic; the estimation from quantum yields of PSII and PSI photochemistry is rather tricky as it needs exact information on the distribution of light energy between PSII and PSI, which can be altered due to drought stress [27].…”

Section: The Effects Of Drought Stress On Psii Cyclic Electron Transportmentioning

confidence: 93%

Photosynthetic proton and electron transport in wheat leaves under prolonged moderate drought stress

Živčák

Kalaji

Shao

et al. 2014

Journal of Photochemistry and Photobiology B: Biology

145

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a b s t r a c tIn conditions of long-lasting moderate drought stress, we have studied the photoprotective responses in leaves of wheat (Triticum aestivum L., cv. Katya) related to the photosynthetic electron and proton transport. The dark-interval relaxation kinetics of electrochromic bandshift (ECS) indicated a decrease of electric and an increase of osmotic component of the proton motive force in drought stressed leaves, but neither the total proton motive force (pmf) nor the thylakoid proton conductance (gH + ) were affected.We observed the enhanced protection against overreduction of PSI acceptor side in leaves of drought stressed plants. This was obviously achieved by the rapid buildup of transthylakoid pH gradient at relatively low light intensities, directly associated to the steep increase of NPQ and the down-regulation of linear electron transport. It was further accompanied by the steep increase of redox poise at PSII acceptor side and PSI donor side. The early responses related to thylakoid lumen acidification in drought-stressed leaves could be associated with the activity of an enhanced fraction of PSI not involved in linear electron flow, which may have led to enhanced cyclic electron pathway even in relatively low light intensities, as well as to the drought-induced decrease of IP-amplitude in fast chlorophyll fluorescence kinetics.

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“…Moreover, a slight increase in nonphotochemical quenching (NPQ) was detected in the lir1 mutant ( Figure 6D). Next, we examined the kinetics of P700 + dark rereduction, which is used as an indicator of cyclic electron transfer (Bukhov et al, 2004;Golding et al, 2004;Fan et al, 2007;Lehtimäki et al, 2010). As shown in Figure 6E, the rereduction rate of P700 + was slower in the lir1 mutant than in the wild type.…”

Section: Loss Of Lir1 Reduces Photosynthetic Electron Transfer In Ricementioning

confidence: 99%

LIGHT-INDUCED RICE1 Regulates Light-Dependent Attachment of LEAF-TYPE FERREDOXIN-NADP⁺ OXIDOREDUCTASE to the Thylakoid Membrane in Rice and Arabidopsis

Yang

Ren

et al. 2016

Plant Cell

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LIR1 (LIGHT-INDUCED RICE1) encodes a 13-kD, chloroplast-targeted protein containing two nearly identical motifs of unknown function. LIR1 is present in the genomes of vascular plants, mosses, liverworts, and algae, but not in cyanobacteria. Using coimmunoprecipitation assays, pull-down assays, and yeast two-hybrid analyses, we showed that LIR1 interacts with LEAF-TYPE FERREDOXIN-NADP + OXIDOREDUCTASE (LFNR), an essential chloroplast enzyme functioning in the last step of photosynthetic linear electron transfer. LIR1 and LFNR formed high molecular weight thylakoid protein complexes with the TIC62 and TROL proteins, previously shown to anchor LFNR to the membrane. We further showed that LIR1 increases the affinity of LFNRs for TIC62 and that the rapid light-triggered degradation of the LIR1 coincides with the release of the LFNR from the thylakoid membrane. Loss of LIR1 resulted in a marked decrease in the accumulation of LFNR-containing thylakoid protein complexes without a concomitant decrease in total LFNR content. In rice (Oryza sativa), photosynthetic capacity of lir1 plants was slightly impaired, whereas no such effect was observed in Arabidopsis thaliana knockout mutants. The consequences of LIR1 deficiency in different species are discussed.

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Drought stress-induced upregulation of components involved in ferredoxin-dependent cyclic electron transfer

Cited by 94 publications

References 20 publications

Expression of the Minor Isoform Pea Ferredoxin in Tobacco Alters Photosynthetic Electron Partitioning and Enhances Cyclic Electron Flow

Expression of the Minor Isoform Pea Ferredoxin in Tobacco Alters Photosynthetic Electron Partitioning and Enhances Cyclic Electron Flow

Photosynthetic proton and electron transport in wheat leaves under prolonged moderate drought stress

LIGHT-INDUCED RICE1 Regulates Light-Dependent Attachment of LEAF-TYPE FERREDOXIN-NADP⁺ OXIDOREDUCTASE to the Thylakoid Membrane in Rice and Arabidopsis

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Drought stress-induced upregulation of components involved in ferredoxin-dependent cyclic electron transfer

Cited by 94 publications

References 20 publications

Expression of the Minor Isoform Pea Ferredoxin in Tobacco Alters Photosynthetic Electron Partitioning and Enhances Cyclic Electron Flow

Expression of the Minor Isoform Pea Ferredoxin in Tobacco Alters Photosynthetic Electron Partitioning and Enhances Cyclic Electron Flow

Photosynthetic proton and electron transport in wheat leaves under prolonged moderate drought stress

LIGHT-INDUCED RICE1 Regulates Light-Dependent Attachment of LEAF-TYPE FERREDOXIN-NADP+ OXIDOREDUCTASE to the Thylakoid Membrane in Rice and Arabidopsis

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LIGHT-INDUCED RICE1 Regulates Light-Dependent Attachment of LEAF-TYPE FERREDOXIN-NADP⁺ OXIDOREDUCTASE to the Thylakoid Membrane in Rice and Arabidopsis