Competition for light color between marine Synechococcus strains with fixed and variable pigmentation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388971%3A_____%2F25%3A00638545" target="_blank" >RIV/61388971:_____/25:00638545 - isvavai.cz</a>

Result on the web

<a href="https://journals.asm.org/doi/10.1128/aem.00087-25" target="_blank" >https://journals.asm.org/doi/10.1128/aem.00087-25</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1128/aem.00087-25" target="_blank" >10.1128/aem.00087-25</a>

Result language

angličtina

Original language name

Competition for light color between marine Synechococcus strains with fixed and variable pigmentation

Original language description

Competition between phytoplankton species for light has triggered extensive diversification of photosynthetic pigments. In Synechococcus cyanobacteria, three major pigment types occur in the ocean: blue light (BL) specialists that have a high ratio of the BL-absorbing chromophore phycourobilin (PUB) to the green light (GL)-absorbing chromophore phycoerythrobilin (PEB), GL specialists that have a low PUB:PEB ratio, and cells that modify their PUB:PEB ratio to match the ambient color, a process called ´Type IV chromatic acclimation´(CA4). The abundance of CA4-capable cells in marine ecosystems suggests that CA4 confers a fitness advantage in certain light conditions compared to cells with fixed pigmentation. This hypothesis was tested by performing mono- and co-cultures of a BL specialist, a GL specialist, and a CA4-capable strain in chemostats under different light conditions. Monocultures enabled us to parameterize a resource competition model that was used to predict competition between the three pigment types in co-cultures. In line with the model predictions, the BL specialist won in low blue light and the GL specialist won in low and high green light. Interestingly, we found that while the CA4-capable strain was at a disadvantage at low light, it was able to outcompete specialists in high blue light.IMPORTANCESynechococcus cyanobacteria are ubiquitous and abundant in the lit layer of most marine ecosystems. This ubiquity relies in part on the wide pigment diversity of their light-harvesting complexes, with three main pigment types thriving in open ocean waters: green light specialists, blue light specialists, and chromatic acclimaters, the latter being capable of matching their pigment content to the ambient spectral field. Here, we simulated the competition for light color that occurs between these pigment types in the field by co-culturing them in various light color and intensity conditions, and compared the resulting data to that of a competition model. This study provides new insights into how this key group of phytoplankton colonizes the various spectral niches of the marine environment.

Czech name

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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

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OECD FORD branch

10606 - Microbiology

Project

—

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

Applied and Environmental Microbiology

ISSN

0099-2240

e-ISSN

1098-5336

Volume of the periodical

91

Issue of the periodical within the volume

8

Country of publishing house

US - UNITED STATES

Number of pages

21

Pages from-to

e00087-25

UT code for WoS article

001534507400001

EID of the result in the Scopus database

2-s2.0-105013821360