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Table 1 Changes of variables of the maximum PSII quantum yield, Fv/Fm, maximum electron transport rate rETRmax and the irradiance saturating photosynthesis Ek were estimated from rapid light-response curves (Additional file 1: Figure S1) monitored at midday on Day 1, 4 and 7 during a 7-day experiment in the presence and absence of Se

From: The synergistic effect of Selenium (selenite, –SeO3 2−) dose and irradiance intensity in Chlorella cultures

Culture treatment

Fluorescence variables (r.u.)

Day 1

Day 4

Day 7

Control (no Se)

F v /F m

0.77

0.75

0.80

rETR max

461

404

359

E k

758

714

531

V j

0.21

0.22

0.21

V i

0.43

0.43

0.43

Se treated culture

F v /F m

0.74

0.74

0.78

rETR max

436

380

332

E k

665

660

625

V j

0.24

0.26

0.23

V i

0.46

0.46

0.46

  1. Changes of variables Vj and Vi were calculated from fast fluorescence induction kinetics (Fig. S2) monitored on Day 1, 4 and 7 during a 10-day experiment in the presence and absence of Se. Vj reflects a reduction of Q A (photochemical phase) while Vi is thought to correspond reflect various redox state of temporary maximum of Q A Q 2−B