Table 2.

Results of different irradiation treatments on P. strigosum cells in terms of maximum quantum yield ($F_V/F_m$), specific growth rate per day ($\mu$), diatoxanthin (DT) relative to the pool of diadinoxanthin and diatoxanthin ($DD+DT$), and the total sum of carotenoids (TC) relative to the sum of Chl-a and Chl-c (Chls). The same quantities have been evaluated after 24 h recovery in the same irradiation conditions as in the control sample. Standard deviation is reported in brackets.

P. strigosum culture	${\mathbf{F}}_{\mathbf{V}}/{\mathbf{F}}_{\mathbf{m}}$	$\mathit{\mu }$ (day-1)	$\frac{\mathbf{DT}}{\mathbf{DD}+\mathbf{DT}}$	$\frac{\mathbf{TC}}{\mathbf{Chls}}$
Initial (all)	0.57 (0.05)	NA	NA	NA
7 days irradiation treatment
Control	0.57 (0.06)	0.08 (0.02)	0.34 (0.14)	1.1 (0.2)
P	0.42 (0.07)	0.05 (0.04)	0.48 (0.04)	1.07962 (0.00003)
PA	0.49 (0.03)	0.07 (0.03)	NA	NA
PAB	0.22 (0.11)	0.089 (0.014)	0.476 (0.013)	0.96 (0.04)
24 h recovery
Control	0.57 (0.05)	NA	NA	NA
P	0.58 (0.06)	NA	0.2462 (0.0007)	0.98 (0.07)
PA	0.60 (0.06)	NA	NA	NA
PAB	0.45 (0.18)	NA	0.30 (0.04)	0.97 (0.10)