Plastoquinone homeostasis in plant acclimation to light intensity

Ksas, Brigitte; Alric, Jean; Caffarri, Stefano; Havaux, Michel

doi:10.1007/s11120-021-00889-1

Cited by 9 publications

(4 citation statements)

References 49 publications

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“…While no correlation could be found with any carotenoid or chlorophyll compound, a weak positive correlation was seen between PQ levels and M plastoglobule size in four of the five hybrids ( Supplemental Fig. S6 ), consistent with the large pool size of PQ in this nonphotosynthetically active site ( Ksas et al 2018 , 2022 ; Havaux 2020 ).…”

Section: Resultssupporting

confidence: 55%

Multiscale physiological responses to nitrogen supplementation of maize hybrids

Ying,

Webster,

Gomez-Cano

et al. 2023

Plant Physiology

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Maize (Zea mays) production systems are heavily reliant on the provision of managed inputs such as fertilizers to maximize growth and yield. Hence, the effective use of nitrogen (N) fertilizer is crucial to minimize the associated financial and environmental costs, as well as maximize yield. However, how to effectively utilize N inputs for increased grain yields remains a substantial challenge for maize growers that requires a deeper understanding of the underlying physiological responses to N fertilizer application. We report a multiscale investigation of five field-grown maize hybrids under low or high N supplementation regimes that includes the quantification of phenolic and prenyl-lipid compounds, cellular ultrastructural features, and gene expression traits at three developmental stages of growth. Our results reveal that maize perceives the lack of supplemented N as a stress and, when provided with additional N, will prolong vegetative growth. However, the manifestation of the stress and responses to N supplementation are highly hybrid-specific. Eight genes were differentially expressed in leaves in response to N supplementation in all tested hybrids and at all developmental stages. These genes represent potential biomarkers of N status and include two isoforms of Thiamine Thiazole Synthase involved in vitamin B1 biosynthesis. Our results uncover a detailed view of the physiological responses of maize hybrids to N supplementation in field conditions that provides insight into the interactions between management practices and the genetic diversity within maize.

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Section: Resultssupporting

confidence: 55%

Multiscale physiological responses to nitrogen supplementation of maize hybrids

Ying,

Webster,

Gomez-Cano

et al. 2023

Plant Physiology

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“…This might be a natural consequence of the increased pool of open PSII RCs which is in contact with previously inactive PQ fraction. As shown in A. thaliana, the maintenance of a stable PQ/PSII ratio in thylakoids is important for efficient photosynthesis 39 .…”

Section: Discussionmentioning

confidence: 99%

“…As shown in A . thaliana , the maintenance of a stable PQ/PSII ratio in thylakoids is important for efficient photosynthesis 39 .…”

Section: Discussionmentioning

confidence: 99%

Salinity-induced changes in plastoquinone pool redox state in halophytic Mesembryanthemum crystallinum L.

Pilarska

Niewiadomska

Kruk

2023

Sci Rep

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We have analyzed the effect of salinity on photosystem II (PSII) photochemistry and plastoquinone (PQ) pool in halophytic Mesembryanthemum crystallinum plants. Under prolonged salinity conditions (7 or 10 days of 0.4 M NaCl treatment) we noted an enlarged pool of open PSII reaction centers and increased energy conservation efficiency, as envisaged by parameters of the fast and slow kinetics of chlorophyll a fluorescence. Measurements of oxygen evolution, using 2,6-dichloro-1,4-benzoquinone as an electron acceptor, showed stimulation of the PSII activity due to salinity. In salt-acclimated plants (10 days of NaCl treatment), the improved PSII performance was associated with an increase in the size of the photochemically active PQ pool and the extent of its reduction. This was accompanied by a rise in the NADP+/NADPH ratio. The presented data suggest that a redistribution of PQ molecules between photochemically active and non-active fractions and a change of the redox state of the photochemically active PQ pool indicate and regulate the acclimation of the photosynthetic apparatus to salinity.

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“…The reduced PQ-9 is likely to be a better 1 O2* scavenger than oxidized PQ-9. It should be noted that the fraction (up to 50%) of the PQ pool located in the PGs and the chloroplast envelopes is photochemically nonactive (Havaux 2020, Ksas et al 2022.…”

Section: Discussionmentioning

confidence: 99%

Exploring lipophilic antioxidants accumulation in field-grown low temperature-stressed Ephedra monosperma

SOFRONOVA,

NOKHSOROV,

PROTOPOPOV

et al. 2023

Biol. plant.

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Ax -antheraxanthin; β-Car -β-carotene; 1 Chl * -singlet excited state of chlorophyll; Fm -maximal fluorescence yield; F0 -minimal fluorescence yield; NPQ -nonphotochemical quenching of chlorophyll fluorescence; 1 O2 * -singlet oxygen; OJIP curve -Chl a fluorescence transient; PGs -plastoglobules; PQ -plastoquinone; PQH2 -plastoquinol; PQtot -total level of PQ (oxidized plus reduced); PSII -photosystem II; QA -primary quinone acceptor of electrons in PSII; RCs -reaction centers; Rhd -keto-carotenoid rhodoxanthin; α-Toc -α-tocopherol; VJ -relative variable fluorescence at the J-step; Vx -violaxanthin; Zх -zeaxanthin; φEo -quantum yield for electron transport; φPo -maximum quantum yield for primary photochemistry.

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Plastoquinone homeostasis in plant acclimation to light intensity

Cited by 9 publications

References 49 publications

Multiscale physiological responses to nitrogen supplementation of maize hybrids

Multiscale physiological responses to nitrogen supplementation of maize hybrids

Salinity-induced changes in plastoquinone pool redox state in halophytic Mesembryanthemum crystallinum L.

Exploring lipophilic antioxidants accumulation in field-grown low temperature-stressed Ephedra monosperma

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