Bei fortschreitender Erderhitzung könnten die Bestände der Phytoplankton-Alge Prochlorococcus einbrechen. Das könnte sich massiv auf die Nahrungsnetze auswirken

Das Meeresbakterium Prochlorococcus produziert bedeutende Mengen des Sauerstoffs auf der Erde. Eine Studie legt nahe, dass dem Organismus die Erwärmung der Ozeane arg zusetzt. Die Folgen könnten schwerwiegend sein.

In this study, the authors show that Prochlorococcus picocyanobacteria form biofilms and dynamically transition between free-living and attached states with significantly different physiology, thus suggesting a role for these bacteria in deep-ocean carbon export.

Decade-long field measurements and modelling show that projected ocean temperatures could restrict cell division rates of an important marine cyanobacterium.

The tiny and enormously abundant marine cyanobacterium Prochlorococcus marinus contains many levels of population structure, with sequenced isolates spanning four orders of magnitude of diversity. It ...

Penny Chisholm has spent decades revealing the secrets of the marine microbe Prochlorococcus

A diverse array of photosynthetic phytoplankton drives primary production in equatorial surface waters. Among these, the cyanobacterium Prochlorococcus is an important contributor to net primary production in these typically iron-limited, high-nutrient and low-chlorophyll (HNLC) regions. Here, we explore the diversity of these organisms, in part, through targeted enrichment of Prochlorococcus cells using field-based high-speed cell sorting techniques. We demonstrate that the genomes of Prochlorococcus belonging to the low-light adapted LLI clade, and isolated from the surface of the Equatorial Pacific Ocean, are depleted in functions related to the assimilation of urea, nitrite, and amino acids. These are the first examples of LLI Prochlorococcus that have lost the ability to use nitrite, a trait considered to be a core feature of this clade. All new equatorial cultures of LLI Prochlorococcus appear to use a distinct isoform of protoporphyrinogen IX oxidase (HemG), for the biosynthesis of a chlorophyll precursor, that does not require the use of iron-containing heme. In contrast, the heme-dependent HemJ isoform is typically used by Prochlorococcus found outside equatorial HNLC waters. Together, these findings suggest that low-light adapted Prochlorococcus in the equatorial ocean possess accessory gene content that reflects adaptation to the generally iron-limited but nitrogen-replete conditions of surface waters. ### Competing Interest Statement The authors have declared no competing interest. U.S. National Science Foundation, https://ror.org/021nxhr62, OCE-2048470, OCE-2220332 Simons Foundation, https://ror.org/01cmst727, 337262, 329108, 723795, 723552, 721254, 549931 Robert and Ardis James Foundation

Abstract. The widespread oceanic cyanobacterial Prochlorococcus genus is a major contributor to global carbon fixation, yet mechanisms enabling this lineag

Prochlorococcus is the most abundant photosynthetic cell on Earth and is critical to primary product

Decade-long field measurements and modelling show that projected ocean temperatures could restrict cell division rates of an important marine cyanobacterium.

Das Meeresbakterium Prochlorococcus produziert bedeutende Mengen des Sauerstoffs auf der Erde. Eine Studie legt nahe, dass dem Organismus die Erwärmung der Ozeane arg zusetzt. Die Folgen könnten schwe...

Scientific Data - Genomes of Prochlorococcus, Synechococcus, bacteria, and viruses recovered from marine picocyanobacteria cultures based on Illumina and Qitan nanopore sequencing

Background Cyanophages, viruses that infect cyanobacteria, are diverse and ubiquitous in the marine environment and play important roles in regulating the host community’s structure, dynamics, and met...