Aerobic bacteria produce nitric oxide via denitrification and promote algal population collapse.

Autor: Abada A; Department of Plant and Environmental Sciences, The Weizmann Institute of Science, Rehovot, Israel., Beiralas R; Department of Plant and Environmental Sciences, The Weizmann Institute of Science, Rehovot, Israel., Narvaez D; Department of Plant and Environmental Sciences, The Weizmann Institute of Science, Rehovot, Israel., Sperfeld M; Department of Plant and Environmental Sciences, The Weizmann Institute of Science, Rehovot, Israel., Duchin-Rapp Y; Department of Plant and Environmental Sciences, The Weizmann Institute of Science, Rehovot, Israel., Lipsman V; Department of Plant and Environmental Sciences, The Weizmann Institute of Science, Rehovot, Israel., Yuda L; Department of Plant and Environmental Sciences, The Weizmann Institute of Science, Rehovot, Israel., Cohen B; Department of Plant and Environmental Sciences, The Weizmann Institute of Science, Rehovot, Israel., Carmieli R; Depertment of Chemical Research Support, The Weizmann Institute of Science, Rehovot, Israel., Ben-Dor S; Department of Life Science Core Facilities, The Weizmann Institute of Science, Rehovot, Israel., Rocha J; CIDEA Consortium Conacyt-Centro de Investigación en Alimentación y Desarrollo, Hermosillo, Mexico., Huang Zhang I; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA., Babbin AR; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA., Segev E; Department of Plant and Environmental Sciences, The Weizmann Institute of Science, Rehovot, Israel. einat.segev@weizmann.ac.il.
Jazyk: angličtina
Zdroj: The ISME journal [ISME J] 2023 Aug; Vol. 17 (8), pp. 1167-1183. Date of Electronic Publication: 2023 May 12.
DOI: 10.1038/s41396-023-01427-8
Abstrakt: Microbial interactions govern marine biogeochemistry. These interactions are generally considered to rely on exchange of organic molecules. Here we report on a novel inorganic route of microbial communication, showing that algal-bacterial interactions between Phaeobacter inhibens bacteria and Gephyrocapsa huxleyi algae are mediated through inorganic nitrogen exchange. Under oxygen-rich conditions, aerobic bacteria reduce algal-secreted nitrite to nitric oxide (NO) through denitrification, a well-studied anaerobic respiratory mechanism. The bacterial NO is involved in triggering a cascade in algae akin to programmed cell death. During death, algae further generate NO, thereby propagating the signal in the algal population. Eventually, the algal population collapses, similar to the sudden demise of oceanic algal blooms. Our study suggests that the exchange of inorganic nitrogen species in oxygenated environments is a potentially significant route of microbial communication within and across kingdoms.
(© 2023. The Author(s).)
Databáze: MEDLINE
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