Multiple plastid losses within photosynthetic stramenopiles revealed by comprehensive phylogenomics

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F25%3A00617429" target="_blank" >RIV/60077344:_____/25:00617429 - isvavai.cz</a>

Alternative codes found

RIV/61988987:17310/25:A26039VB RIV/00216208:11310/25:10496529

Result on the web

<a href="https://doi.org/10.1016/j.cub.2024.11.065" target="_blank" >https://doi.org/10.1016/j.cub.2024.11.065</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cub.2024.11.065" target="_blank" >10.1016/j.cub.2024.11.065</a>

Result language

angličtina

Original language name

Multiple plastid losses within photosynthetic stramenopiles revealed by comprehensive phylogenomics

Original language description

Ochrophyta is avast and morphologically diverse group of algae with complex plastids, including familiar taxa with fundamental ecological importance (diatoms or kelp) and a wealth of lesser-known and obscure organisms. The sheer diversity of ochrophytes poses a challenge for reconstructing their phylogeny, with major gaps in sampling and an unsettled placement of particular taxa yet to be tackled. We sequenced transcriptomes from 25 strategically selected representatives and used these data to build the most taxonomically comprehensive ochrophyte-centered phylogenomic supermatrix to date. We employed a combination of approaches to reconstruct and critically evaluate the relationships among ochrophytes. While generally congruent with previous analyses, the updated ochrophyte phylogenomic tree resolved the position of several taxa with previously uncertain placement and supported a redefinition of the classes Picophagea and Synchromophyceae. Our results indicated that the heterotrophic, plastid-lacking heliozoan Actinophrys sol is not a sister lineage of ochrophytes, as proposed recently, but rather phylogenetically nested among them, implying that it lacks a plastid due to loss. In addition, we found the heterotrophic ochrophyte Picophagus flagellatus to lack all hallmark plastid genes yet to exhibit mitochondrial proteins that seem to be genetic footprints of a lost plastid organelle. We thus document, for the first time, plastid loss in two separate ochrophyte lineages. Furthermore, by exploring eDNA data, we enrich the ochrophyte phylogenetic tree by identifying five novel uncultured class-level lineages. Altogether, our study provides a new framework for reconstructing trait evolution in ochrophytes and demonstrates that plastid loss is more common than previously thought.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10606 - Microbiology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Current Biology

ISSN

0960-9822

e-ISSN

1879-0445

Volume of the periodical

35

Issue of the periodical within the volume

3

Country of publishing house

US - UNITED STATES

Number of pages

26

Pages from-to

"483"-"499.e8"

UT code for WoS article

001422585400001

EID of the result in the Scopus database

2-s2.0-85216475810