Bioresources and Bioprocessing

Table 1 Analysis of PSII and PSI activity decrease in the photorespiration-impaired mutants compared to the WT

From: Impairing photorespiration increases photosynthetic conversion of CO₂ to isoprene in engineered cyanobacteria

Light intensity	Parameters	ΔglcD1/D2 (%)	IspS	MEP*-IspS
Light intensity	Parameters	ΔglcD1/D2 (%)	ΔglcD1/D2 (%)	ΔglcD1/D2 (%)
Normal	rETR(II) and Y(II)	5.6–10	2.2–4.2	0.45–2.2
Normal	rETR(I) and Y(I)	0–14	− 1.47 to 3.8	− 2.6 to 1.4
High	rETR(II) and Y(II)	14–60	5.5–30	3–13
High	rETR(I) and Y(I)	20–73	8.1–32	2.7–11.6

Normal light intensity, 60–100 μmol m⁻² s⁻¹
High light intensity, 142–2292 μmol m⁻² s⁻¹

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