Insights into the Production and Role of Nitric Oxide in the Antarctic Sea‐ice Diatom Fragilariopsis cylindrus

• DOI: 10.1111/jpy.13027
• Publication Date: 2020-05-19T22:06:57Z
• Authors: Fraser Kennedy; Andrew Martin; Andrew McMinn
• Keywords: Psychrophile

Nitric oxide (NO) is widely recognized as an important transmitter molecule in biological systems, from animals to plants and microbes. However, the role of NO marine photosynthetic microbes remains unclear even less known about this metabolite Antarctic sea‐ice diatoms. Using a combination microsensors, microfluidic chambers, artificial tanks, basic mechanistic insight into NO's dynamics within diatom Fragilariopsis cylindrus was obtained. Results suggest that production F. nitrite‐dependent via nitrate reductase. abolished upon exposure light but could be induced when normal electron flow disrupted. The addition exogenous cellular suspensions negatively influenced growth, disrupted photosynthesis, altered non‐photochemical dissipation mechanisms. also observed cells were exposed stressful salinity temperature regimes. These results during periods environmental stress, produced “stress signa” molecule.