Effect of light on carotenoid and lipid production in the oleaginous yeast Rhodosporidium toruloides

Figures & data

Table 1. Carotenoid composition of R. toruloides cell grown under light or dark conditions.

Carotenoids	Dark		Light
β-carotene	37.00	±1.03	48.72	±1.77
γ-carotene	1.48	±0.34	3.54	±0.03
Torulene	27.24	±0.67	15.05	±0.22
Torularhodin	1.16	±0.23	3.39	±0.35
Others	33.12	±2.28	29.29	±1.92

Table 2. Fatty acid composition of R. toruloides cell grown under light or dark conditions.

Fatty acids		Light		Dark
Myristic	C14:0	3.49	±2.20	4.42	±4.27
Palmitic	C16:0	19.83	±2.92	19.69	±2.08
Palmitoleic	C16:1	3.61	±3.54	1.56	±0.28
Stearic	C18:0	6.73	±1.54	7.62	±1.27
Oleic	C18:1	57.11	±4.99	60.41	±2.31
Linoleic	C18:2	1.52	±0.33	1.65	±0.61
α-Linoleic	C18:3	4.49	±5.50	1.12	±0.66
Arachidic	C20:0	0.42	±0.04	0.63	±0.07
Behenic	C22:0	1.43	±1.00	1.46	±0.74
Lignoceric	C24:0	1.37	±0.56	1.44	±0.07

Figure 1. Biosynthesis pathway in R. toruloides.

Figure 2. Growth rate parameters of R. toruloides in the light (white circle) and dark (black circle).

Figure 3. Effect of light irradiation on the expression of the genes related to carotenoid and lipid biosynthetic pathways.

Figure 4. Effect of light irradiation on the expression of the genes for mevalonate and carotenoid biosynthetic pathways during the early stages of culture growth.

Figure 5. Effect of the light irradiation on the expression of the genes WC1, WC2 and CRY1.