Chlorophyll fluorescence as a light signal enhances iron uptake by the marine diatom Phaeodactylum tricornutum under high-cell density conditions

Table 1 Photosynthetic performance, pigment content of P. tricornutum and Fe concentration of medium under different cell density

		Dark-L	Dark-M	Dark-H	WL-L	WL-M	WL-H
Fv/Fm		0.35±0.04	0.38±0.01	0.33±0.02	0.6±0.03	0.59±0.02	0.58±0.01
Y(II)	PAR: 86 μE/m² s	0.24±0.02	0.23±0.01	0.24±0.01	0.59±0.01	0.57±0.01	0.54±0.01
Y(II)	PAR: 611μE/m² s	0.16±0.04	0.16±0.02	0.16±0.02	0.4±0.03	0.38±0.01	0.35±0.02
rETR(II)	PAR: 86 μE/m² s	8.77±2.06	9.37±0.57	7.65±1.34	20.3±0.52	20.5±0.17	19.67±0.29
rETR(II)	PAR: 611 μE/m² s	42±11.19	40.47±5.46	41.2±3.99	101.67±7.77	96.6±1.61	90.43±4.35
NPQ	PAR: 86 μE/m² s	1.05±0.1	1.09±0.13	1.29±0.2	0.04±0.07	0.03±0.02	0.05±0.03
NPQ	PAR: 611 μE/m² s	0.9±0.09	0.93±0.02	1.08±0.13	0.09±0.09	0.1±0.03	0.19±0.04
PSII rETRmax (μmol/m²s)		84.35±5.3	55.15±23.26	58.2±5.33	114.1±6.84	106.43±4.8	101.53±5.12
PSI rETRmax (μmol/m²s)		102.8±59.54	432.55±405.95	444.07±43.13	183.33±47.59	200.63±31.22	156.65±46.32
chla content mg/g DW		0.85±0.08	1.17±0.01	0.91±0.02	1.18±0.01	0.88±0.01	0.51±0.04
DEPS		0.29	0.32	0.20	0.15	0.14	0.09
Fe content (μM)	ASW +f/2: 11.62±0.04	8.31±0.08	8.34±0.14	8.20±0.05	8.77±0.1	8.78±0.27	8.80±0.11

ISSN: 1741-7007