Figure 2.

HPLC analysis of pigment extracts from the diatom P. tricornutum growing under periodic HL stress. Extract from cells (A) after 10-min illumination with HL1 (700 μmol m⁻²⋅s⁻¹), (B) after 6-h HL1, and (C) after 6-h HL1 followed by 10-min LL (40 μmol m⁻²⋅s⁻¹). 1, Chl c₁+ c₂; 2, fucoxanthin; 3, Vx; 4, Ddx; 5, Ax; 6, Dtx; 7, Zx; 8, derivatives of Chl a (two peaks); 9, Chl a; 10, β-carotene.