Glycinebetaine alleviates the inhibitory effect of moderate heat stress on the repair of photosystem II during photoinhibition

Allakhverdiev, Suleyman I.; Los, Dmitry A.; Mohanty, Prasanna; Nishiyama, Yoshitaka; Murata, Norio

doi:10.1016/j.bbabio.2007.10.005

Cited by 95 publications

(46 citation statements)

References 50 publications

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“…But what is its mechanism? Previous reports suggested that, under heat stress, GB can attenuate the effects of heat-induced inhibition of the PS II and will alleviate the inhibitory effect of heat stress on the repair of photosystem II during photoinhibition and protect it against heat-induced injuries (Allakhverdiev and Murata 2004;Allakhverdiev et al 1996Allakhverdiev et al , 2007. What is more, the improvement of GB in photosynthesis may be related to the protection of GB on proteins in the thylakoid membrane (Allakhverdiev et al 1996(Allakhverdiev et al , 2003Kreslavski et al 2007).…”

Section: Discussionmentioning

confidence: 88%

Improvement of heat and drought photosynthetic tolerance in wheat by overaccumulation of glycinebetaine

Wang

Hui

Liu

et al. 2010

Plant Biotechnol Rep

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Within their natural habitat, crops are often subjected to drought and heat stress, which suppress crop growth and decrease crop production. Causing overaccumulation of glycinebetaine (GB) has been used to enhance the crop yield under stress. Here, we investigated the response of wheat (Triticum aestivum L.) photosynthesis to drought, heat stress and their combination with a transgenic wheat line (T6) overaccumulating GB and its wild-type (WT) Shi4185. Drought stress (DS) was imposed by controlling irrigation until the relative water content (RWC) of the flag leaves decreased to between 78 and 82%. Heat stress (HS) was applied by exposing wheat plants to 40°C for 4 h. A combination of drought and heat stress was applied by subjecting the drought-stressed plants to a heat stress as above. The results indicated that all stresses decreased photosynthesis, but the combination of drought and heat stress exacerbated the negative effects on photosynthesis more than exposure to drought or heat stress alone. Drought stress decreased the transpiration rate (Tr), stomatal conductance (Gs) and intercellular CO 2 concentration (Ci), while heat stress increased all of these; the deprivation of water was greater under drought stress than heat stress, but heat stress decreased the antioxidant enzyme activity to a greater extent. Overaccumulated GB could alleviate the decrease of photosynthesis caused by all stresses tested. These suggest that GB induces an increase of osmotic adjustments for drought tolerance, while its improvement of the antioxidative defense system including antioxidative enzymes and antioxidants may be more important for heat tolerance.

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Section: Discussionmentioning

confidence: 88%

Improvement of heat and drought photosynthetic tolerance in wheat by overaccumulation of glycinebetaine

Wang

Hui

Liu

et al. 2010

Plant Biotechnol Rep

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“…PCC 6803 are limited (Thornton et al, 2004; Ishikawa et al, 2005; Summerfield et al, 2005; Sveshnikov et al, 2007) there are some indications for this proposed function: PPL1, the closest homolog of CyanoP in the PsbP superfamily of green algae and higher plants (Sato, 2010), was shown to be required for efficient PSII assembly and repair under high light stress (Ishihara et al, 2007). Unfortunately, this effect was neither reported nor excluded for any of the CyanoP deletion mutants, but notably Eaton-Rye and coworkers (Summerfield et al, 2005) noticed reduced growth under elevated temperature, a condition known to cause inactivation of PSII (Allakhverdiev et al, 2007). In concordance, a variation of charge separation properties, which was noticed in a comparative study of the different CyanoP deletion mutants (Sveshnikov et al, 2007), might also be attributed to improperly assembled PSII reaction centers (RCs) as discussed recently (Bricker et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Localization of the CyanoP binding site on photosystem II by surface plasmon resonance spectroscopy

et al. 2014

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Photosystem II (PSII), a large multi subunit membrane protein complex localized in the thylakoid membrane of cyanobacteria and chloroplasts, is the only known enzyme that catalyzes the light-driven oxidation of water. In addition to the membrane intrinsic part of PSII, efficient oxygen evolution requires soluble protein subunits at its luminal interface. In contrast to the detailed crystal structure of the active cyanobacterial complex the characterization of intermediate PSII species related to its assembly and repair is hampered by their instability or low abundance. As most structural variations of the corresponding PSII species are based on a different set of protein factors bound to the luminal interface of the complex we developed a system for interaction analysis between PSII and its soluble interaction partners based on surface plasmon resonance (SPR) spectroscopy. The assay was validated by the correct localization of the extrinsic PSII proteins PsbO, PsbV, and PsbU on the luminal PSII surface and used to determine the unknown binding position of CyanoP, the cyanobacterial homolog of higher plant PsbP. The CyanoP binding site was clearly localized in the center of PSII at a position, which is occupied by the PsbO subunit in mature PSII complexes. Consistently, we demonstrate selective binding of CyanoP to an inactive PSII assembly intermediate that lacks the extrinsic subunits PsbO, PsbV, and PsbU. These findings suggest, that CyanoP functions in the dynamic lifecycle of PSII, possibly in the association of CP47 and CP43 or in photoactivation of the oxygen-evolving complex.

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“…It was demonstrated by many other researchers that exogenous application of GB enhanced tolerance to heavy metals and other stresses such as drought, salinity, heat, and cold (Allakhverdiev et al, 2007;Yang et al, 2008;Islam et al, 2009). GB may maintain photosynthetic capacity by increasing stomatal conductance and maintaining RuBisCo activity and chloroplast ultrastructure under drought stress (Nomura et al, 1998).…”

Section: Discussionmentioning

confidence: 99%

Glycine betaine-induced lead toxicity tolerance related to elevated photosynthesis, antioxidant enzymes suppressed lead uptake and oxidative stress in cotton

Bharwana¹,

Ali²,

Farooq³

et al. 2014

Turk J Bot

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Anthropogenic activities contaminate soils with heavy metal concentrations including lead (Pb), cadmium (Cd), copper (Cu), and chromium (Cr). Pb has higher potential for ready accumulation, sedimentation, and poisoning of the soil than other heavy metals. The present study was conducted to induce Pb tolerance, in solution culture-grown cotton, by exogenous glycinebetaine (GB) application using 3 levels of Pb (0, 50, and 100 µm) and 2 GB levels (0 and 1 mM). The results revealed that Pb stress decreased gas exchange characteristics (net photosynthetic rate, stomatal conductance, transpiration rate, water use efficiency, chlorophyll, carotenoids, and SPAD value) and the performance of antioxidant enzymes. Toxic effects of Pb stress were mitigated by GB application, which in turn increased the plant growth and gas exchange characteristics by reducing the performance of malondialdehyde (MDA), hydrogen peroxide (H 2 O 2 ), and electrolytic leakage. An increase in the activity of antioxidant enzymes helped in mediating the adverse effect of the Pb stress as compared to plants treated with Pb alone. The results revealed that exogenous application of GB significantly alleviated the Pb toxicity by improving the growth, biomass, and photosynthetic parameters in cotton (Gossypium L.) plants. GB increased Pb tolerance by enhancing the chlorophyll synthesis, photosynthetic activities, and antioxidant enzyme activities and by lowering the electrolytic leakage, MDA, and H 2 O 2 levels.

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Glycinebetaine alleviates the inhibitory effect of moderate heat stress on the repair of photosystem II during photoinhibition

Cited by 95 publications

References 50 publications

Improvement of heat and drought photosynthetic tolerance in wheat by overaccumulation of glycinebetaine

Improvement of heat and drought photosynthetic tolerance in wheat by overaccumulation of glycinebetaine

Localization of the CyanoP binding site on photosystem II by surface plasmon resonance spectroscopy

Glycine betaine-induced lead toxicity tolerance related to elevated photosynthesis, antioxidant enzymes suppressed lead uptake and oxidative stress in cotton

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