The effect of different light regimes on pigments in Coscinodiscus granii

Yanyan Su

doi:10.1007/s11120-018-0608-7

The effect of different light regimes on pigments in Coscinodiscus granii

Yanyan Su^*

^*Corresponding author for this work

Section for Plant Glycobiology

6 Citations (Scopus)

Abstract

The influence of six different light regimes throughout the photosynthetically active radiation range (from 400 to 700 nm, including blue, green, yellow, red-orange, red, and white) at two intensities (100 and 300 µmol photons m⁻² s⁻¹) on pigmentation was assessed for the centric marine diatom Coscinodiscus granii for the first time. Chlorophyll (Chl) a and fucoxanthin were the dominating pigments in all treatments. The cellular concentrations of light harvesting pigment (Chl a, Chl c1 + c2, and fucoxanthin) were higher at 100 than at 300 µmol photons m⁻² s⁻¹ at all wavelengths, with the largest increases at red and blue light. The normalized concentrations of photoprotective pigments (violaxanthin, zeaxanthin, diadinoxanthin, and diatoxanthin) were higher at high light intensity than in cells grown at low light intensity. An increase in β-carotene in low light conditions is expected as the increased Chl a was related to increased photosynthetic subunits which require β-carotene (bound to photosystem core). At 300 µmol photons m⁻² s⁻¹, yellow light resulted in significantly lower concentration of most of the detected pigments than the other wavelengths. At 100 µmol photons m⁻² s⁻¹, W and B light led to statistically lower and higher concentration of most of the detected pigments than the other wavelengths, respectively.

Original language	English
Journal	Photosynthesis Research
Volume	140
Issue number	3
Pages (from-to)	301–310
ISSN	0166-8595
DOIs	https://doi.org/10.1007/s11120-018-0608-7
Publication status	Published - 1 Jun 2019

Keywords

Coscinodiscus granii
Light intensity
Light wavelength
Photosynthesis
Pigment

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/s11120-018-0608-7

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title = "The effect of different light regimes on pigments in Coscinodiscus granii",

abstract = "The influence of six different light regimes throughout the photosynthetically active radiation range (from 400 to 700 nm, including blue, green, yellow, red-orange, red, and white) at two intensities (100 and 300 µmol photons m−2 s−1) on pigmentation was assessed for the centric marine diatom Coscinodiscus granii for the first time. Chlorophyll (Chl) a and fucoxanthin were the dominating pigments in all treatments. The cellular concentrations of light harvesting pigment (Chl a, Chl c1 + c2, and fucoxanthin) were higher at 100 than at 300 µmol photons m−2 s−1 at all wavelengths, with the largest increases at red and blue light. The normalized concentrations of photoprotective pigments (violaxanthin, zeaxanthin, diadinoxanthin, and diatoxanthin) were higher at high light intensity than in cells grown at low light intensity. An increase in β-carotene in low light conditions is expected as the increased Chl a was related to increased photosynthetic subunits which require β-carotene (bound to photosystem core). At 300 µmol photons m−2 s−1, yellow light resulted in significantly lower concentration of most of the detected pigments than the other wavelengths. At 100 µmol photons m−2 s−1, W and B light led to statistically lower and higher concentration of most of the detected pigments than the other wavelengths, respectively.",

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The effect of different light regimes on pigments in Coscinodiscus granii

Abstract

Keywords

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