Effect of sulphur on selenium accumulation and speciation in Nannochloropsis oceanica

Sulphur (S) and selenium (Se) are chemically similar. Once Se is taken up, it substitutes S in S-containing amino acids. This study investigated the effect of on selenite accumulation microalga Nannochloropsis oceanica. [0–28 mM] concentrations 0 30 μM were tested. ≤ 3 mM led to decreased cell growth whereas cultures with ≥ 4 not limited. increased up 8-fold when using 2 28 mM. The average relative abundance organic species was selenomethionine (SeMet) 98.2 %, selenocystine (SeCys2) 1.4 % selenomethyl selenocysteine (SeMeSeCys) 0.4 %. Total fatty acids affected by limitation or presence. first accumulation, speciation N. oceanica its potential as an Se-enriched food/feed ingredient.