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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.
