| Title: |
Photophysiology of the haploid form of the cryptophyte Teleaulax amphioxeia |
| Authors: |
Garric, Sarah; Ratin, Morgane; Gallet, Benoit; Decelle, Johan; Probert, Ian; Rodriguez, Francisco; Six, Christophe |
| Contributors: |
Adaptation et diversité en milieu marin (AD2M); Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Station biologique de Roscoff = Roscoff Marine Station (SBR); Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS); Institut de biologie structurale (IBS - UMR 5075); Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG); Direction de Recherche Fondamentale (CEA) (DRF (CEA)); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA); Photosymbiose; Physiologie cellulaire et végétale (LPCV); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA); Station biologique de Roscoff = Roscoff Marine Station (SBR); Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS); Instituto Español de Oceanografía = Spanish Institute of Oceanography (IEO; Consejo Superior de Investigaciones Cientificas España = Spanish National Research Council Spain (CSIC) |
| Source: |
ISSN: 0022-3646. |
| Publisher Information: |
CCSD; Wiley |
| Publication Year: |
2024 |
| Collection: |
Université Grenoble Alpes: HAL |
| Subject Terms: |
Cryptophyte; Teleaulax; Plagioselmis; light; photosynthesis; photoacclimation; [SDV.BV]Life Sciences [q-bio]/Vegetal Biology |
| Description: |
International audience ; Cryptophytes are abundant and ubiquitous microalgae that constitute a major plastid source for kleptoplastidic ciliates and dinoflagellates. Despite their ecological significance, the understanding of their light preferences and photophysiology remains limited. Here, we provide a comprehensive study of the response of the haploid strain Teleaulax amphioxeia (Cr10EHU) to varying light irradiance. This strain is capable of growing under a wide range of irradiance levels, notably by finely tuning the different pigments bound to the membrane light‐harvesting proteins. Analysis of the luminal phycoerythrin content revealed remarkable flexibility, with phycoerythrin emerging as a pivotal protein facilitating acclimation to varying light levels. Detailed ultrastructure examinations unveiled that this adaptability was supported by the synthesis of large thylakoidal vesicles, likely enhancing the capture of green photons efficiently under low light, a phenomenon previously undocumented. Teleaulax amphioxeia Cr10EHU effectively regulated light utilization by using a cryptophyte state transition‐like process, with a larger amplitude observed under high growth irradiance. Furthermore, our results revealed the establishment of growth irradiance‐dependent non‐photochemical quenching of fluorescence, likely inducing the dissipation of excess light. This study underscores the particularities and the significant photoadaptability of the plastid of the haploid form of T. amphioxeia . It constitutes a comprehensive photophysiological characterization of the Cr10EHU strain that paves the way for future studies of the kleptoplastidy process. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1111/jpy.13495 |
| Availability: |
https://hal.science/hal-04781170; https://hal.science/hal-04781170v1/document; https://hal.science/hal-04781170v1/file/Garric%20et%20al.%20PlagioLight_v3.pdf; https://doi.org/10.1111/jpy.13495 |
| Rights: |
https://creativecommons.org/licenses/by-nc-nd/4.0/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.98D6C044 |
| Database: |
BASE |