Effect of Light with Different Wavelengths on Nostoc flagelliforme Cells in Liquid Culture

Abstract

The effects of lights with different wavelengths on the growth and the yield of extracellular polysaccharides of Nostoc flagelliforme cells were investigated in a liquid cultivation. N. flagelliforme cells were cultured for 16 days in 500 ml conical flasks containing BG11 culture medium under 27 micromol·m-2·s-1 of light intensity and 25 degrees C on a rotary shaker (140 rpm). The chlorophyll a, phycocyanin, allophycocyanin, and phycoerythrin contents in N. flagelliforme cells under the lights of different wavelengths were also measured. It was found that the cell biomass and the yield of polysaccharide changed with different wavelengths of light. The biomass and the yield of extracellular polysaccharides under the red or violet light were higher than those under other light colors. Chlorophyll a, phycocyanin, and allophycocyanin are the main pigments in N. flagelliforme cells. The results showed that N. flagelliforme, like other cyanobacteria, has the ability of adjusting the contents and relative ratio of its pigments with the light quality. As a conclusion, N. flagelliforme cells favor red and violet lights and perform the complementary chromatic adaptation ability to acclimate to the changes of the light quality in the environment.

Modulation of phycobiliprotein production in Nostoc muscorum through culture manipulation

“…Therefore, the studied strain Nostoc muscorum adjusts the phycobiliproteins composition in response to the light quality, in order to use the light source most effectively for photosynthesis and other related activities. The results are in accordance with the reports on Nostoc flagelliforme by [24] as large number of cyanobacteria can change their composition of photosynthetic pigments by chromatic adaptation as these organisms have probably evolved mechanisms to modify their photosynthetic machinery in response to spectral quality of light. [25,26] reported white light for Anabaena sp.…”

Effects of Modification of Light Parameters on the Production of Cryptophycin, Cyanotoxin with Potent Anticancer Activity, in Nostoc sp.

“…The curves for white and orange light were close together and tripled after 10 days of growth. In contrast, under blue light, the growth was significantly slower (Figure 2a), as was previously observed in other laboratories [31][32][33], and the biomass only doubled during this 10-day period. Blue light also negatively affected the production of Cry.…”

“…and Synechococcus sp. strains have shown a positive effect on cell growth under red light and a negative effect under blue light [31][32][33]. Cyanobacteria, like plants, use two pigment complexes, Photosystem II (PSII) and Photosystem I (PSI), to perform photosynthesis.…”

Análisis bibliométrico del efecto de la luz en la producción de ficobiliproteínas

“…El tipo 1 presenta cambios en su contenido de ficobiliproteínas por la luz externa, el tipo 2 aumenta de ficoeritrina por luces verde o roja pero no variable en ficocianina, el tipo 3 aumento de ficoeritrina al verde y acumulación de ficocianinas al rojo (aclimatación cromática complementaria) y un tipo 4 adicional principalmente en cianobacterias marinas que ajustan su composición en respuesta a la prevalencia de longitudes de ondas azules frente al verde. Diversos estudios han descrito que la luz azul produce tasas de producción de O2 más bajas que la luz roja en las cianobacterias y también en algas rojas que contienen PBS y otro mostró el color azul como uno con una respuesta de crecimiento más lenta en cianobacterias [48].…”