Effect of trehalose on oxygen evolution and electron transfer in photosystem 2 complexes

Mamedov, Mahir D.; Petrova, I. O.; Yanykin, Denis V.; Zaspa, A. A.; Semenov, Alexey Yu.

doi:10.1134/s0006297915010071

Cited by 23 publications

(8 citation statements)

References 39 publications

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“…It was reported that PsbP, one of the extrinsic OEC proteins, is essential for the normal PSII function in higher plants in vivo (Ifuku et al 2005), and it plays an important role in the dynamic life cycle of PSII (Ifuku et al 2008, Ifuku et al 2011. In this way, the upregulation of the PsbP content in the Tre-treated group during the recovery period helps to the recovery of PSII, which is in agreement with the result reported by Mamedov et al (2015) that trehalose significantly stimulates the steady-state rate of O2 . Effects of exogenously supplied trehalose and heat stress on protein levels in wheat control seedlings (CK) and plants that pretreated with trehalose for 3 d (Tre).…”

Section: Discussionsupporting

confidence: 89%

Comparative chloroplast proteome analysis of exogenously supplied trehalose to wheat seedlings under heat stress

Luo¹,

Liu²,

Fan³

et al. 2018

Photosynt.

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The aim of our study was to investigate the underlying molecular mechanisms of exogenously supplied trehalose affecting wheat photosynthesis under heat stress. The amount of ATP synthase (ATPase), oxygen-evolving enhancer protein (OEE), PsbP, Rubisco, chloroplast fructose-bisphosphate aldolase (FBPA), and ferredoxin-NADP(H) oxidoreductase (FNR) were downregulated, while PSI reaction center subunits were upregulated under heat stress. However, in the trehalose-pretreated groups, the amount of FNR, cytochrome b 6 f complex, PSI reaction center subunits, ATPase, FBPA, and Rubisco were upregulated under normal growth conditions and heat stress. Besides, during the recovery period, the upregulation in CAB, PsbP, OEE2, and ATPase suggested that trehalose pretreatment might help to the recovery of PSII and PSI. These results indicate that trehalose pretreatment effectively regulates the levels of the photosynthesis-related proteins and relieves the damage of heat stress to wheat chloroplast.

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Section: Discussionsupporting

confidence: 89%

Comparative chloroplast proteome analysis of exogenously supplied trehalose to wheat seedlings under heat stress

Luo¹,

Liu²,

Fan³

et al. 2018

Photosynt.

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“…In addition, trehalose significantly stimulates and stabilizes the oxygen evolution rate in the PSII complex (Mamedov et al . 2015). Our results indicate that the trehalose pretreatment increased the PQ pool under the heat and drought stresses (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Trehalose also significantly stimulates the stabilized oxygen evolution rate in the PSII complex (Mamedov et al . 2015). However, the specific protective mechanism of trehalose against stresses remains unknown.…”

Section: Introductionmentioning

confidence: 99%

Exogenous trehalose protects photosystem II by promoting cyclic electron flow under heat and drought stresses in winter wheat

Luo

Xie

et al. 2021

Plant Biol J

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Drought and rising global temperatures are important factors that reduce wheat production. Trehalose protects the reaction centres and improves photosystem II (PSII) activity under diverse stress conditions. However, the underlying mechanism remains unknown. Cyclic electron flow (CEF) plays an important role in protecting PSII under environmental stresses. Our study focused on the effects of exogenous trehalose on the activity of PSII, D1 protein content, plastoquinone (PQ) pool and ATP synthase activity in wheat seedlings under heat and drought stresses to explore the relationship between trehalose and CEF. The results indicated that heat and drought stresses decreased maximum photochemical efficiency of PSII (Fv/Fm) and electron transport rate of PSII (EFR(II)), whereas the trehalose pretreatment improved photochemical efficiency and electron transport rate of PSII. The trehalose pretreatment stimulated CEF under heat and drought stresses. Furthermore, the proton gradient (ΔpH) across the thylakoid membrane and ATPase activity increased. The higher ΔpH and ATPase activity played a key role in protecting PSII under stresses. Trehalose pretreatment could reduce inhibition caused by heat and drought stresses on the PQ pool. Thus, our results indicated that photoinhibition in heat‐ and drought‐stressed plants was alleviated by the trehalose pretreatment, which was mediated by CEF and the PQ pool.

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“…The increase in the content of β-antiparallel content might be caused by increased polymerization. Trehalose can influence the hydration degree of proteins, causing them to adopt a more optimal conformation (Mamedov et al 2015). Under heat stress, protein secondary structures in trehalosepretreated seedlings remained relatively stable, especially ordered α-helix content, which was observably higher than in the control (Table 1).…”

Section: O N L I N E F I R S Tmentioning

confidence: 98%

Exogenous trehalose protects photosystem II in heat-stressed wheat

et al. 2022

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Background: Photosystem II (PSII) is susceptible to heat stress. Plants naturally accumulate trehalose to improve stress tolerance. However, the mechanism by which trehalose affects PSII during heat stress is still unknown. Questions: How does trehalose affect PSII during heat stress? Studied species: Triticum aestivum L. Study site and dates: Shanghai, China. 2019-2021. Methods: Trehalose -pretreated wheat seedlings suffered from heat stress and their photosynthetic parameters were measured. Results: Heat stress caused a reduction in the photochemical efficiency of PSII, the electron transfer rate (ETR(II)), the quantum yield of regulated energy dissipationY(NPQ) and the coefficient of photochemical quenching (qP), but increased the quantum yield of non-regulated energy dissipation of PSII (Y[NO]). The shape of the fast chlorophyll fluorescence induction kinetics (OJIP) curve in the heat-stressed wheat was altered and the primary photochemistry maximum yield of PSII (Fv/Fo) and the PSII performance indicator PIabs were reduced. Accordingly, the activities of PSII and electron transport chain, the amount of ordered α-helix structures and the content of D1 protein also decreased. However, in trehalose-pretreated wheat, D1 protein and protein secondary structures of PSII were both protected, the electron transport activities of PSII and the whole chain were improved and greater fluorescence parameters values were maintained. Lower Y(NO) and more stable OJIP were obtained. Conclusions: Exogenous trehalose acted a vital role in the protection of the function of PSII, resulting in higherphotosynthetic capacity under heat stress.

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Effect of trehalose on oxygen evolution and electron transfer in photosystem 2 complexes

Cited by 23 publications

References 39 publications

Comparative chloroplast proteome analysis of exogenously supplied trehalose to wheat seedlings under heat stress

Comparative chloroplast proteome analysis of exogenously supplied trehalose to wheat seedlings under heat stress

Exogenous trehalose protects photosystem II by promoting cyclic electron flow under heat and drought stresses in winter wheat

Exogenous trehalose protects photosystem II in heat-stressed wheat

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