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231224s2016 xx |||||o 00| ||eng c |
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|a 10.1016/j.jplph.2016.05.012
|2 doi
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|a pubmed24n0871.xml
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|a (NLM)27302007
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|a (PII)S0176-1617(16)30072-4
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Tiwari, Anupam
|e verfasserin
|4 aut
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1 |
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|a Role of calcium in the mitigation of heat stress in the cyanobacterium Anabaena PCC 7120
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|c 2016
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 12.01.2018
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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 Copyright © 2016 Elsevier GmbH. All rights reserved.
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|a The effects of exogenously added CaCl2 (0.25mM) on photopigments, photosynthetic O2-evolution, antioxidative enzyme activity, membrane damage, expression of two heat shock genes (groEL and groES) and apoptotic features in Anabaena 7120 under heat stress (45°C) for up to 24h were investigated. Heat stress lowered the level of photopigments; however, Ca2+--supplemented cultures showed a low level reduction in Chl a but induced accumulation of carotenoids and phycocyanin under heat stress. Photosynthetic O2-evolving capacity was maintained at a higher level in cells from Ca2+-supplemented medium. Among the antioxidative enzymes, superoxide dismutase activity was unaffected by the presence or absence of Ca2+ in contrast to increases in catalase, ascorbate peroxidase and glutathione reductase activities in cells grown in Ca2+-supplemented medium. Lower levels of lipid peroxidation were recorded in Anabaena cells grown in Ca2+-supplemented medium in comparison to cells from Ca2+--deprived medium. Target cells grown in Ca2+-deprived medium developed apoptotic features in the early stages of heat shock, while Ca2+ application seemed to interfere with apoptosis because only a few cells showed such features after 24 h of heat exposure, indicating a role for Ca2+ in maintaining cell viability under heat stress. There was also continuous up regulation of two important heat shock genes (groEL and groES) in Ca2+-supplemented cultures, exposed to heat shock, again indicating a role for Ca2+ in stress management
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|a Journal Article
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|a Anabaena PCC7120
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|a Antioxidative defense
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|a Apoptosis
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|a Heat shock
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|a Photosynthetic O(2)-evolution
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|a groEL/ES
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|a Antioxidants
|2 NLM
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|a Bacterial Proteins
|2 NLM
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|a Chaperonin 10
|2 NLM
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|a Chaperonin 60
|2 NLM
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|a Phycocyanin
|2 NLM
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|a 11016-15-2
|2 NLM
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|a Chlorophyll
|2 NLM
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|a 1406-65-1
|2 NLM
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|a Carotenoids
|2 NLM
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|a 36-88-4
|2 NLM
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|a Calcium Chloride
|2 NLM
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|a M4I0D6VV5M
|2 NLM
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|a Oxygen
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|a Chlorophyll A
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|a YF5Q9EJC8Y
|2 NLM
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|a Singh, Priyanka
|e verfasserin
|4 aut
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|a Asthana, Ravi Kumar
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of plant physiology
|d 1979
|g 199(2016) vom: 20. Juli, Seite 67-75
|w (DE-627)NLM098174622
|x 1618-1328
|7 nnns
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| 773 |
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|g volume:199
|g year:2016
|g day:20
|g month:07
|g pages:67-75
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|u http://dx.doi.org/10.1016/j.jplph.2016.05.012
|3 Volltext
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|d 199
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