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231224s2011 xx |||||o 00| ||eng c |
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|a 10.1111/j.1529-8817.2011.01060.x
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|a eng
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| 100 |
1 |
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|a Beer, Anja
|e verfasserin
|4 aut
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|a INFLUENCE OF DIFFERENT LIGHT INTENSITIES AND DIFFERENT IRON NUTRITION ON THE PHOTOSYNTHETIC APPARATUS IN THE DIATOM CYCLOTELLA MENEGHINIANA (BACILLARIOPHYCEAE)(1)
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|c 2011
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|a Text
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|a ƒaComputermedien
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|a Date Completed 30.03.2016
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|a Date Revised 08.10.2021
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2011 Phycological Society of America.
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|a The diatom Cyclotella meneghiniana Kütz. (SAG 1020-a) was cultured under high-light (HL) and low-light (LL) conditions with either high (12 μM) or low (1 μM) iron in the media. Changes in cell morphology, especially cell volume and chloroplast size, were observed in cells grown under low iron. In contrast, HL had a much stronger influence on the photosynthetic apparatus. PSII function was unimpaired under lowered iron supply, but its quantum efficiency and reoxidation rate were reduced under HL conditions. As reported before, HL induced changes in antenna polypeptide composition. Especially the amount of Fcp6, an antenna protein related to LI818 and known to be involved in photoprotection, was increased under HL but was significantly reduced under lowered iron. The diatoxanthin content correlated with the amount of Fcp6 in isolated FCPa antenna complexes and was thus increased under HL and reduced under low iron as well. While the diatoxanthin (Dt) content of whole cells was enhanced under HL, no decrease was observed under lowered iron supply, ruling out the possibility that the decreased amounts in FCPa were due to a hampered diadinoxanthin de-epoxidase activity under these conditions. Thus, diatoxanthin not bound to FCPa has to be responsible for protection under the slight reduction in iron supply used here
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|a Journal Article
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|a FCP
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|a diatoxanthin
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|a photosystem II
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|a thylakoids
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|a xanthophyll cycle
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|a Juhas, Matthias
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|a Büchel, Claudia
|e verfasserin
|4 aut
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|i Enthalten in
|t Journal of phycology
|d 1966
|g 47(2011), 6 vom: 29. Dez., Seite 1266-73
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|x 1529-8817
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|g volume:47
|g year:2011
|g number:6
|g day:29
|g month:12
|g pages:1266-73
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