Survival of Nutrient-Starved Diatoms Under Ocean Acidification: Perspective from Nutrient Sensing, Cadmium Detection, and Nitrogen Assimilation.
Zhen ZhangKe PanHongbin LiuPublished in: Bulletin of environmental contamination and toxicology (2023)
Increased anthropogenic emissions of carbon dioxide (CO 2 ) have resulted in ocean acidification (OA) that is intertwined with enhanced ocean stratification. Diatoms are assumed to suffer from a more nutrient-limited condition in the future ocean. This study aimed to explore how OA affects the diatom dynamics under nutrient-poor conditions and the ability of diatoms to perceive nutrients (nitrogen, phosphorus, silicon, and trace metals) and cadmium (Cd) stimuli and assimilate nitrogen when receiving nutrients or Cd supplementation. Our study observed that diatom population grown under OA condition declined faster than those grown under ambient condition. Ocean acidification greatly lower intracellular Ca 2+ concentration in diatom cells. Intracellular Ca 2+ burst was involved in phosphorus accumulation but not in nitrogen, silicon, essential metals, and cadmium uptake. Our data demonstrate slower NO 3 - assimilation rates of diatoms grown in acidified seawater. Our study also indicates that diatoms have a poor perception of phosphorus availability under OA condition.
Keyphrases
- heavy metals
- knee osteoarthritis
- carbon dioxide
- induced apoptosis
- signaling pathway
- machine learning
- risk assessment
- cell proliferation
- health risk
- big data
- particulate matter
- cell death
- reactive oxygen species
- human health
- drinking water
- high resolution
- endoplasmic reticulum stress
- climate change
- deep learning
- cell cycle arrest
- sensitive detection
- pi k akt
- loop mediated isothermal amplification