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Colonies of the Marine Cyanobacterium Optimize Dust Utilization by Selective Collection and Retention of Nutrient-rich Particles

Overview
Journal iScience
Publisher Cell Press
Date 2022 Jan 10
PMID 35005537
Authors
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Abstract

, a globally important, N-fixing, and colony-forming cyanobacterium, employs multiple pathways for acquiring nutrients from air-borne dust, including active dust collection. Once concentrated within the colony core, dust can supply with nutrients. Recently, we reported a selectivity in particle collection enabling to center iron-rich minerals and optimize its nutrient utilization. In this follow-up study we examined if colonies select Phosphorus (P) minerals. We incubated 1,200 colonies from the Red Sea with P-free CaCO, P-coated CaCO, and dust, over an entire bloom season. These colonies preferably interacted, centered, and retained P-coated CaCO compared with P-free CaCO. In both studies, clearly favored dust over all other particles tested, whereas nutrient-free particles were barely collected or retained, indicating that the colonies sense the particle composition and preferably collect nutrient-rich particles. This unique ability contributes to 's current ecological success and may assist it to flourish in future warmer oceans.

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