KOPS - Das Institutionelle Repositorium der Universität Konstanz

Acclimation of Trichodesmium erythraeum ISM101 to high and low irradiance analysed on the physiological, biophysical and biochemical level

Acclimation of Trichodesmium erythraeum ISM101 to high and low irradiance analysed on the physiological, biophysical and biochemical level

Zitieren

Dateien zu dieser Ressource

Prüfsumme: MD5:4247d664b32f99a277dd88e55a93bd71

ANDRESEN, Elisa, Jens LOHSCHEIDER, Eva ETLÍKOVÁ, Iwona ADAMSKA, Miloslav IMEK, Hendrik KÜPPER, 2010. Acclimation of Trichodesmium erythraeum ISM101 to high and low irradiance analysed on the physiological, biophysical and biochemical level. In: New Phytologist. 185(1), pp. 173-188. eISSN 0028-646X

@article{Andresen2010Accli-6603, title={Acclimation of Trichodesmium erythraeum ISM101 to high and low irradiance analysed on the physiological, biophysical and biochemical level}, year={2010}, doi={10.1111/j.1469-8137.2009.03068.x}, number={1}, volume={185}, journal={New Phytologist}, pages={173--188}, author={Andresen, Elisa and Lohscheider, Jens and etlíková, Eva and Adamska, Iwona and imek, Miloslav and Küpper, Hendrik} }

2011-03-24T17:27:44Z Adamska, Iwona imek, Miloslav eng Lohscheider, Jens As the nonheterocystous diazotrophic cyanobacterium Trichodesmium lives both at the ocean surface and deep in the water column, it has to acclimate to vastly different irradiances. Here, we investigate its strategy of light acclimation in several ways.<br />In this study, we used spectrally resolved fluorescence kinetic microscopy to investigate the biophysics of photosynthesis in individual cells, analysed cell extracts for pigment and phycobiliprotein composition, measured nitrogenase activity and the abundance of key proteins, and assayed protein synthesis/degradation by radioactive labelling.<br />After acclimation to high light, Trichodesmium grew faster at 1000 μmol m-2 than at 100 μmol m-2 S-1. This acclimation was associated with decreasing cell diameter, faster protein turnover, the down-regulation of light-harvesting pigments and the outer part of the phycobiliprotein antenna, the up-regUlation of light-protective carotenoids, changes in the coupling of phycobilisomes to thereaction centres and in the coupling of individual phycobiliproteins to the phycobilisomes. The latter was particularly interesting, as it represents an as yet unreported light acclimation strategy.<br />Only in the low light-acclimated culture and only after the onset of actinic light did phycourobilin and phycoerythrin contribute to photochemical fluorescence quenching, showing that these phycobiliproteins may become quickly (in seconds) very closely coupled to photosystem 11. This fast reversible coupling also became visible in the nonphotochemical changes of the fluorescence quantum yield. Andresen, Elisa Adamska, Iwona 2011-03-24T17:27:44Z deposit-license First publ. in: New Phytologist 185 (2010), 1, pp. 173-188 imek, Miloslav application/pdf etlíková, Eva Lohscheider, Jens 2010 Acclimation of Trichodesmium erythraeum ISM101 to high and low irradiance analysed on the physiological, biophysical and biochemical level etlíková, Eva Küpper, Hendrik Küpper, Hendrik Andresen, Elisa

Dateiabrufe seit 01.10.2014 (Informationen über die Zugriffsstatistik)

Acclimation_neu.pdf 108

Das Dokument erscheint in:

KOPS Suche


Stöbern

Mein Benutzerkonto