Table I.

Relative changes in transcript abundance in cells of Synechocyctis PCC6803 exposed to high light as determined by real-time RT-PCR

Gene Name	Change in Transcript Abundance in High Light Relative to Low Light
	pH 8.0, 3% CO2	pH 7.0, 1% CO2
	%
cmpA	−121 ± 52	9 ± 54
ndhF3	−34 ± 58	−30 ± 76
sbtA	−92 ± 56	−67 ± 62
sodB	260 ± 65	n.d.
psbA2	158 ± 80	−22 ± 91
rbcL	−10 ± 47	139 ± 73
ccmM	−5 ± 65	107 ± 103
ndhF4	24 ± 72	n.d.
ndhD2	15 ± 53	n.d.

Cultures of low-light-grown cells (20 μmol photons m⁻² s⁻¹) were split and exposed to 300 μmol photons m⁻² s⁻¹ for 15 min at 30°C, or maintained at low light (low-light control). Transcript changes in the high-light treatment were referenced to the low-light treatment. The [CO₂] was maintained at 3% (v/v) or 1% (v/v) in air, as indicated. The means ± se of four replicate measurements are shown.