Suppression of the phytoene synthase gene (EgcrtB) alters carotenoid content and intracellular structure of Euglena gracilis

Table 1 Effect of high-intensity light on the growth and chlorophyll content of E. gracilis

Treatment (μmol m⁻² s⁻¹)	Final cell concentration (×10⁶ cells ml⁻¹)	Cell weight (mg FW 10⁶ cells⁻¹)	Chlorophyll content (nmol 10⁶ cells⁻¹)		Chlorophyll a/b
Treatment (μmol m⁻² s⁻¹)	Final cell concentration (×10⁶ cells ml⁻¹)	Cell weight (mg FW 10⁶ cells⁻¹)	a	b	Chlorophyll a/b
27	1.9 ± 0.1^a	2.2 ± 0.2^a	9.2 ± 0.8^a	1.3 ± 0.3^a	7.1 ± 0.7^a
55	1.9 ± 0.1^a	2.6 ± 0.1^a	8.9 ± 0.4^a	1.3 ± 0.1^a	6.9 ± 0.3^a
240	2.0 ± 0.0^a	3.0 ± 0.1^a	6.1 ± 0.1^b	0.9 ± 0.0^b	6.7 ± 0.2^a
460	2.0 ± 0.0^a	2.7 ± 0.1^a	5.4 ± 0.3^b	0.8 ± 0.1^b	7.0 ± 0.2^a
920	0.5 ± 0.1^b	5.5 ± 0.6^b	3.7 ± 0.3^c	0.6 ± 0.1^b	6.5 ± 0.7^a

Data represent the mean ± SD of biological triplicates. Different letters in each column indicate a significant differences (P < 0.05, Tukey’s test)

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