

FOLLOWUS
1.Key Laboratory of Aquacultural Biotechnology Ministry of Education, Ningbo University, Ningbo315211, China
2.Ningbo Institute of Oceanography, Ningbo315832, China
3.Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo315211, China
4.Fujian Dalai Seedling Technology Co., Ltd., Luoyuan350600, China
ranzhaoshou@nbu.edu.cn
xujilin@nbu.edu.cn
Received:16 November 2023,
Published:01 November 2024
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KONG Fei,ZHANG Jiaxing,YANG Dongzi,et al.Research PaperEffects of light spectra on growth and compositions of biomass, fatty acids, and pigments in three typical microalgae from different phyla[J].Journal of Oceanology and Limnology,2024,42(06):1976-1990.
KONG Fei,ZHANG Jiaxing,YANG Dongzi,et al.Research PaperEffects of light spectra on growth and compositions of biomass, fatty acids, and pigments in three typical microalgae from different phyla[J].Journal of Oceanology and Limnology,2024,42(06):1976-1990. DOI: 10.1007/s00343-024-3243-5.
The growth and nutrients of photosynthetic organisms are significantly influenced by light spectra
yet this relationship is not well-understood in microalgae. Herein
we studied three microalgae species—
Chaetoceros
sp.
Isochrysis
galbana
and
Tetraselmis
helgolandica
—distinguishe
d by their pigments. We exposed them to seven light spectra
including white (control)
red
orange
green
blue
violet
and full spectrum. The results showed distinct responses in the three microalgae to varying light spectra. Optimal growth occurred under blue
violet
and white lights for
Chaetoceros
sp.
I
.
galbana
and
T
.
helgolandica
respectively
while orange
red
and green lights inhibited growth. Notably
green light significantly increased the protein content in all three microalgae. Carbohydrate and lipid content exhibited species-specific responses: the highest carbohydrate accumulation was achieved for
Chaetoceros
sp. under red light (73.27±1.45 mg/g)
I
.
galbana
under orange light (122.89±12.28 mg/g)
and
T
.
helgolandica
under blue light (43.62±2.79 mg/g). Meanwhile
the highest lipid content was obtained under violet light for
Chaetoceros
sp. and
I
.
galbana
(250.80±7.27 and 320.23±5.75 mg/g
respectively)
and under green light for
T
.
helgolandica
(255.12±31.19 mg/g). Furthermore
violet light greatly promoted the accumulation of polyunsaturated fatty acids in all three microalgae. Specific pigment compositions also responded to variations in light spectra. For instance
the diadinoxanthin content in
Chaetoceros
sp. increased significantly under orange light (194.77±13.78 µg/g)
while chlorophyll-
a
content in
I
.
galbana
increased significantly under violet and blue lights ((88.84±33.46)–(141.38±1.64) µg/g)
and in
T
.
helgolandica
under red
green
and blue lights ((1 485.04±190.46)–(1 886.60±387.42) µg/g). Additionally
I
.
galbana
exhibited the highest fucoxanthin
diadinoxanthin
and
β
-carotene contents under white light. In conclusion
our results highlight the species-specific impact of light spectra on microalgae growth and nutrients
providing valuable guidance for flexible application of light spectra in microalgal production to enhance yields and target specific nutrients.
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