Combined effects of water stress and high temperature on photosynthesis, nitrogen metabolism and lipid peroxidation of a perennial grass Leymus chinensis

Xu, Zhenzhu; Zhou, Guang‐Jie

doi:10.1007/s00425-006-0281-5

Cited by 262 publications

(190 citation statements)

References 51 publications

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“…In the current chamber experiment, there was a decline in the net CO 2 acclimation rate (A) from both stomatal conductance (g s ) reduction and PSII activity loss at high temperature, suggesting that the stomatal and nonstomatal limitations to carbon assimilation are comparable, being consistent with results by Kaiser (1987), Xu and Zhou (2006), and Kauffman and others (2007). In a transgenic tobacco plant, however, von Caemmerer and others (2004) reported that stomatal limitation does not contribute mainly to photosynthesis change, whereas Marques da Silva and Arrabaca (2004) indicated that stomatal limitation can play a major role in the decrease in photosynthesis in a waterstressed C 4 grass, in agreement with Schulze (1986).…”

Section: Discussionsupporting

confidence: 90%

Photosynthetic Potential and its Association with Lipid Peroxidation in Response to High Temperature at Different Leaf Ages in Maize

Zhou

Han

et al. 2010

J Plant Growth Regul

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High temperature generally constrains plant growth and photosynthesis in many regions of the world; however, little is known about how photosynthesis responds to high temperature with regard to different leaf ages. The synchronous changes in gas exchange and chlorophyll fluorescence at three leaf age levels (just fully expanded, mature, and older leaves) of maize (Zea mays L.) were determined at three temperatures (30°C as a control and 36 and 42°C as the higher temperatures). High temperature significantly decreased the net CO 2 assimilation rate (A), stomatal conductance (g s ), maximal efficiency of photosystem II (PSII) photochemistry (F v /F m ), efficiency of excitation energy capture by open PSII reaction centers (F 0 v =F 0 m ), photochemical quenching of variable chlorophyll fluorescence (q P ), and the electron transport rate (ETR), whereas minimal fluorescence yield (F 0 ) and nonphotochemical quenching of variable chlorophyll fluorescence (q N ) were increased. The youngest fully expanded leaves had higher A, ETR, and q P compared with older leaves. Higher temperature with old leaves led to significant malondialdehyde (MDA) accumulation, a proxy for lipid peroxidation damage from active oxygen species (AOS). MDA content was significantly negatively correlated with A, F v /F m , F 0 v =F 0 m , and q P .Thus, the results suggest that photosynthetic potentials, including stomatal regulation and PSII activity, may be restricted at high temperature, together with increasing cell peroxidation, which may be closely associated with leaf age.

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Section: Discussionsupporting

confidence: 90%

Photosynthetic Potential and its Association with Lipid Peroxidation in Response to High Temperature at Different Leaf Ages in Maize

Zhou

Han

et al. 2010

J Plant Growth Regul

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“…Drought (Yordanov et al, 2000;Gilgen et al, 2010;Aranjuelo et al, 2011;Aimar et al, 2014) and heat (Haldimann and Feller, 2005;Sharkey, 2005;Fu et al, 2008;Chen et al, 2014;Cottee et al, 2014;Feng et al, 2014) as well as interactions between these two environmental stresses (Valladeres and Pearcy, 1997;Xu and Zhou, 2006;De Boeck et al, 2007;Grigorova et al, 2011Grigorova et al, , 2012Vile et al, 2012;Balla et al, 2014;Jagadish et al, 2014;Sekmen et al, 2014) must be considered for a comprehensive evaluation of carbon assimilation in the course of global change. Leaf temperature is often elevated in droughtstressed plants, since ambient temperature is also high and cooling by transpiration is less efficient when stomata are less open or epicuticular waxes are produced (Gallé and Feller, 2007;Gallé et al, 2007;Aharoni et al, 2004;Reynolds-Henne et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Drought stress and carbon assimilation in a warming climate: Reversible and irreversible impacts

Feller

2016

Journal of Plant Physiology

122

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Global change is characterized by increased CO2 concentration in the atmosphere, increasing average temperature and more frequent extreme events including drought periods, heat waves and flooding. Especially the impacts of drought and of elevated temperature on carbon assimilation are considered in this review. Effects of extreme events on the subcellular level as well as on the whole plant level may be reversible, partially reversible or irreversible. The photosynthetically active biomass depends on the number and the size of mature leaves and the photosynthetic activity in this biomass during stress and subsequent recovery phases. The total area of active leaves is determined by leaf expansion and senescence, while net photosynthesis per leaf area is primarily influenced by stomatal opening (stomatal conductance), mesophyll conductance, activity of the photosynthetic apparatus (light absorption and electron transport, activity of the Calvin cycle) and CO2 release by decarboxylation reactions (photorespiration, dark respiration). Water status, stomatal opening and leaf temperature represent a "magic triangle" of three strongly interacting parameters. The response of stomata to altered environmental conditions is important for stomatal limitations. Rubisco protein is quite thermotolerant, but the enzyme becomes at elevated temperature more rapidly inactivated (decarbamylation, reversible effect) and must be reactivated by Rubisco activase (carbamylation of a lysine residue). Rubisco activase is present under two forms (encoded by separate genes or products of alternative splicing of the premRNA from one gene) and is very thermosensitive. Rubisco activase was identified as a key protein for photosynthesis at elevated temperature (non-stomatal limitation). During a moderate heat stress Rubisco activase is reversibly inactivated, but during a more severe stress (higher temperature and/or longer exposure) the protein is irreversibly inactivated, insolubilized and finally degraded. On the level of the leaf, this loss of photosynthetic activity may still be reversible when new Rubisco activase is produced by protein synthesis. Rubisco activase as well as enzymes involved in the detoxification of reactive oxygen species or in osmoregulation are considered as important targets for breeding crop plants which are still productive under drought and/or at elevated leaf temperature in a changing climate.

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“…Nevertheless, the weather change condition, characterized by the co-occurrence of co-varying environmental variables, often affects plant chemical composition differently, as when applied separately (Xu & Zhou, 2006). In our experiments, the weather change condition seems to have altered the DM content in 2012 in both cuts.…”

Section: Chemical Composition Of Green Foragementioning

confidence: 52%

The effect of biological and chemical additives on the chemical composition and fermentation process of Dactylis glomerata silage

Alba-Mejía

Skládanka

Hilgert-Delgado

et al. 2016

Span. j. agric. res.

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This study was carried out to determine the chemical composition, silage quality and ensilability of ten cocksfoot cultivars using biological and chemical silage additives. The plant material was harvested from the first and second cut, cultivated at the Research Station of Fodder Crops in Vatín, Czech Republic. Wilted forage was chopped and ensiled in mini-silos with 3 replicates per treatment. The treatments were: 1) without additives, used as a control; 2) with bacterial inoculants; and 3) with chemical preservatives. The results indicated that the year factor (2012-2013) influenced significantly the chemical composition of the silage in both cuts. The use of biological inoculants reduced the content of crude fibre and acid detergent fibre; but it did not influence the content of neutral detergent fibre, in comparison with the control silage in both cuts. Furthermore, the application of biological inoculants reduced the concentration of lactic acid (LA) and acetic acid (AA) in contrast to the control silage in the first cut. Moreover, in the second cut the same values tended to be the opposite. Interestingly, ‘Amera’ was the unique variety that presented a high concentration of butyric acid (0.2%) in comparison with other varieties in the first cut. In conclusion, the biological inoculants had a favourable effect on silage fermentation. Notably, only ‘Greenly’ and ‘Starly’ varieties from the first cut; and ‘Greenly’, ‘Sw-Luxor’, and ‘Otello’ varieties from the second cut were appropriate for ensiling because their pH-values; LA and AA concentrations were ideal according to the parameters of the fermentation process.

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Combined effects of water stress and high temperature on photosynthesis, nitrogen metabolism and lipid peroxidation of a perennial grass Leymus chinensis

Cited by 262 publications

References 51 publications

Photosynthetic Potential and its Association with Lipid Peroxidation in Response to High Temperature at Different Leaf Ages in Maize

Photosynthetic Potential and its Association with Lipid Peroxidation in Response to High Temperature at Different Leaf Ages in Maize

Drought stress and carbon assimilation in a warming climate: Reversible and irreversible impacts

The effect of biological and chemical additives on the chemical composition and fermentation process of Dactylis glomerata silage

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