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231223s2008 xx |||||o 00| ||eng c |
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|a 10.1016/j.jplph.2007.12.011
|2 doi
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|a eng
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| 100 |
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|a Kreslavski, Vladimir
|e verfasserin
|4 aut
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|a Characterization of the nature of photosynthetic recovery of wheat seedlings from short-term dark heat exposures and analysis of the mode of acclimation to different light intensities
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|c 2008
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 05.05.2009
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|a Date Revised 30.09.2020
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a The nature of photosynthetic recovery was investigated in 10-d-old wheat (Triticum aestivum L., cv. Moskovskaya-35) seedlings exposed to temperatures of 40 and 42 degrees C for 20 min and to temperature 42 degrees C for 40 min in the dark. The aftereffect of heat treatment was monitored by growing the heat-treated plants in low/moderate/high light at 20 degrees C for 72h. The net photosynthetic rates (P(N)) and the fluorescence ratios F(v)/F(m) were evaluated in intact primary leaves and the rates of cyclic and non-cyclic photophosphorylation were measured in the isolated thylakoids. At least two temporally separated steps were identified in the path of recovery from heat stress at 40 and 42 degrees C in the plants growing in high and moderate/high light, respectively. Both photochemical activity of the photosystem II (PSII) and the activity of CO(2) assimilation system were lowered during the first step in comparison with the corresponding activities immediately after heat treatment. During the second step, the photosynthetic activities completely or partly recovered. Recovery from heat stress at 40 degrees C was accompanied by an appreciably higher rate of cyclic photophosphorylation in comparison with control non-heated seedlings. In pre-heated seedlings, the tolerance of the PSII to photoinhibition was higher than in non-treated ones. The mode of acclimation to different light intensities after heat exposures is analyzed
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|a Journal Article
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|a Chloramphenicol
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|a Ascorbic Acid
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|a PQ6CK8PD0R
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| 700 |
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|a Tatarinzev, Nikolai
|e verfasserin
|4 aut
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|a Shabnova, Nadezhda
|e verfasserin
|4 aut
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|a Semenova, Galina
|e verfasserin
|4 aut
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|a Kosobryukhov, Anatoli
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of plant physiology
|d 1979
|g 165(2008), 15 vom: 09. Okt., Seite 1592-600
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|x 1618-1328
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|g month:10
|g pages:1592-600
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|u http://dx.doi.org/10.1016/j.jplph.2007.12.011
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