ITEMS

modern scholarly publishers in the finest tradition

Journals

	Search

International Journal on Algae

ISSN for PRINT: 1521-9429

Institutional price:	$905.00
Issues per year:	4

Best Paper Award Selection - Editorial Board Site

2007, Volume9

97 pages

DOI: 10.1615/InterJAlgae.v9.i4

Issue price - $251.00

The effect of red light on a photosynthetic apparatus under auto- and photo-heterotrophic growth of Spirulina platensis (Nordst.) Geitl. (Cyanophyta)

Svetlana I. Los'
N.G. Kholodny Institute of Botany, National Academy of Sciences of Ukraine, 2, Tereshchenkavskaya St., 01001 Kiev, Ukraine

R. N. Fomishina
N.G. Kholodny Institute of Botany, National Academy of Sciences of Ukraine, 2, Tereshchenkavskaya St., 01010 Kiev, Ukraine

S. N. Vasilchenko
N.G. Kholodny Institute of Botany, National Academy of Sciences of Ukraine, 2, Tereshchenkovskaya St., 01001 Kiev, Ukraine

T. O. Zakharova
N.G. Kholodny Institute of Botany, National Academy of Sciences of Ukraine, 2, Tereshchenkovskaya St., 01001 Kiev, Ukraine

Alexandr A. Sivash
N. G. Kholodny Institute of Botany, National Academy of Sciences of Ukraine, 2 Tereshchenkivska Str.. Kiev 01601, Ukraine

ABSTRACT

The effect of red light-emitting diodes (LED) (λ_max = 630 nm, Δλ = 20 nm) on a photosynthetic apparatus and the growth of Spirulina platensis (Nordst.) Geitl. were studied under auto- and photo-heterotrophic conditions. It was shown that the addition of red light against the background of luminescent lamps illumination leads to a decrease in the pigment content, whereas the pigment relationship was unchanged. The involvement of glucose into the culture medium further decreases the content of all pigments and changes their relationship on both white and red lights. The red light was favorable for a considerable accumulation of biomass of the alga, the maximal value of which was observed under conditions of photo-heterotrophic growth (by 3.6 times). Based on biochemical and fluorescent indices, a conclusion is drawn that use of the red light by the photosynthetic apparatus of S. platensis is effective. The employment of monochromatic red LED makes it possible to change the spectral composition of artificial light sources, to investigate the specific peculiarities of adaptation of algal cultures to the light regime, and to provide electric energy saving.