KOPS - The Institutional Repository of the University of Konstanz

The diatom Phaeodactylum tricornutum adjusts nonphotochemical fluorescence quenching capacity in response to dynamic light via fine-tuned Lhcx and xanthophyll cycle pigment synthesis

The diatom Phaeodactylum tricornutum adjusts nonphotochemical fluorescence quenching capacity in response to dynamic light via fine-tuned Lhcx and xanthophyll cycle pigment synthesis

Cite This

Files in this item

Checksum: MD5:a19bbea55c6a624e82320c11d64127ff

LEPETIT, Bernard, Gautier GÉLIN, Mariana LEPETIT, Sabine STURM, Sascha VUGRINEC, Alessandra ROGATO, Peter G. KROTH, Angela FALCIATORE, Johann LAVAUD, 2017. The diatom Phaeodactylum tricornutum adjusts nonphotochemical fluorescence quenching capacity in response to dynamic light via fine-tuned Lhcx and xanthophyll cycle pigment synthesis. In: New Phytologist. 214(1), pp. 205-218. ISSN 0028-646X. eISSN 1469-8137. Available under: doi: 10.1111/nph.14337

@article{Lepetit2017-04diato-36240, title={The diatom Phaeodactylum tricornutum adjusts nonphotochemical fluorescence quenching capacity in response to dynamic light via fine-tuned Lhcx and xanthophyll cycle pigment synthesis}, year={2017}, doi={10.1111/nph.14337}, number={1}, volume={214}, issn={0028-646X}, journal={New Phytologist}, pages={205--218}, author={Lepetit, Bernard and Gélin, Gautier and Lepetit, Mariana and Sturm, Sabine and Vugrinec, Sascha and Rogato, Alessandra and Kroth, Peter G. and Falciatore, Angela and Lavaud, Johann} }

Kroth, Peter G. Lepetit, Mariana eng Lavaud, Johann Rogato, Alessandra 2016-12-08T13:52:53Z Gélin, Gautier Falciatore, Angela terms-of-use Falciatore, Angela Lepetit, Bernard 2017-04 Rogato, Alessandra Lepetit, Mariana Diatoms contain a highly flexible capacity to dissipate excessively absorbed light by nonphotochemical fluorescence quenching (NPQ) based on the light-induced conversion of diadinoxanthin (Dd) into diatoxanthin (Dt) and the presence of Lhcx proteins. Their NPQ fine regulation on the molecular level upon a shift to dynamic light conditions is unknown.<br /><br />We investigated the regulation of Dd + Dt amount, Lhcx gene and protein synthesis and NPQ capacity in the diatom Phaeodactylum tricornutum after a change from continuous low light to 3 d of sine (SL) or fluctuating (FL) light conditions. Four P. tricornutum strains with different NPQ capacities due to different expression of Lhcx1 were included.<br /><br />All strains responded to dynamic light comparably, independently of initial NPQ capacity. During SL, NPQ capacity was strongly enhanced due to a gradual increase of Lhcx2 and Dd + Dt amount. During FL, cells enhanced their NPQ capacity on the first day due to increased Dd + Dt, Lhcx2 and Lhcx3; already by the second day light acclimation was accomplished. While quenching efficiency of Dt was strongly lowered during SL conditions, it remained high throughout the whole FL exposure.<br /><br />Our results highlight a more balanced and cost-effective photoacclimation strategy of P. tricornutum under FL than under SL conditions. Kroth, Peter G. 2016-12-08T13:52:53Z Vugrinec, Sascha Lavaud, Johann Sturm, Sabine The diatom Phaeodactylum tricornutum adjusts nonphotochemical fluorescence quenching capacity in response to dynamic light via fine-tuned Lhcx and xanthophyll cycle pigment synthesis Lepetit, Bernard Vugrinec, Sascha Sturm, Sabine Gélin, Gautier

Downloads since Dec 8, 2016 (Information about access statistics)

Lepetit_2-1x7lmrn0zesyw7.pdf 127

This item appears in the following Collection(s)

Search KOPS


Browse

My Account