Fig. 2
From: Nitrogen and phosphorus stress as a tool to induce lipid production in microalgae
Projection of the studied variables and observations onto the factorial plane PC 1 and PC 2 for Heterokontophyta/Ochrophyta. Indicators (variables): light intensity (µmol photons m− 2 s− 1); cultivation time (days); lipid content (% DW); lipid productivity (mg L− 1 day− 1); total nitrogen (g L− 1); total phosphorus (g L− 1); N:P (unit). Observations: species or strain numbers (circles): Chaetoceros muelleri (1); Chaetoceros calcitrans (2); Cylindrotheca fusiformis (3, 4); Phaeodactylum tricornutum (5–7); Phaeodactylum tricornutum CCMP 2561 (8); Skeletonema costatum (9); Skeletonema sp. (10); Thalassiosira pseudonana (11); Vischeria magna (12); Vischeria vischeri (13–16); Vischeria cf. polyphem (17–24); Monodopsis subterranea UTEX 151 (25); Nannochloropsis sp. F&M-M26 (26); Nannochloropsis sp. F&M-M28 (27); Nannochloropsis sp. F&M-M29 (28); Microchloropsis gaditana CCMP527 (29); Nannochloropsis granulata CCMP525 (30); Nannochloropsis limnetica CCMP505 (31); Nannochloropsis oceanica 805 (32); Nannochloropsis oceanica CCMP1779 (33); Nannochloropsis oceanica CCMP531 (34); Nannochloropsis oceanica IMET1 (35); Nannochloropsis oculata (36–38); Nannochloropsis oculata CCMP529 (39); Microchloropsis salina CCMP1176 (40); Microchloropsis salina CCMP537 (41); Nannochloropsis sp. (42–44); Nannochloropsis sp. CS 246 (45); Nannochloropsis sp. F&M-M24 (46); Nannochloropsis sp. F&M-M27 (47); Ellipsoidion sp. (48). Group A: Vischeria species. Group B: Eustigmatophyceae, Xanthophyceae and Bacillariophyceae species