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RESPONSE OF PROROCENTRUM MARIAE‐LEBOURIAE (DINOPHYCEAE) TO LIGHT OF DIFFERENT SPECTRAL QUALITIES AND IRRADIANCES: GROWTH AND PIGMENTATION 1
Author(s) -
Faust Maria A.,
Sager John C.,
Meeson Blanche W.
Publication year - 1982
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.1982.tb03195.x
Subject(s) - dinoflagellate , biology , peridinin , pigment , chlorophyll , dinophyceae , chlorophyll a , red tide , botany , irradiance , flux (metallurgy) , algae , optics , phytoplankton , physics , chemistry , ecology , fucoxanthin , organic chemistry , nutrient
Growth and pigment concentrations of the, estuarine dinoflagellate, Prorocentrum mariae‐lebouriae (Parke and Ballantine) comb. nov., were measured in cultures grown in white, blue, green and red radiation at three different irradiances. White irradiances (400–800 nm) were 13.4, 4.0 and 1.8 W · m −2 with photon flux densities of 58.7 ± 3.5, 17.4 ± 0.6 and 7.8 ± 0.3 μM quanta · m −2 · s −1 , respectively. All other spectral qualities had the same photon flux densities. Concentrations of chlorophyll a and chlorophyll c were inversely related to irradiance. A decrease of 7‐ to 8‐fold in photon flux density resulted in a 2‐fold increase in chlorophyll a and c and a 1.6‐ to 2.4‐fold increase in both peridinin and total carotenoid concentrations. Cells grown in green light contained 22 to 32% more peridinin per cell and exhibited 10 to 16% higher peridinin to chlorophyll a ratios than cells grown in white light. Growth decreased as a function of irradiance in white, green and red light grown cells but was the same at all blue light irradiances. Maximum growth rates occurred at 8 μM quanta · m −2 · s −1 in blue light, while in red and white light maximum growth rates occurred at considerably higher photon flux densities (24 to 32 μM quanta · m −2 · s −1 ). The fastest growth rates occurred in blue and red radiation. White radiation producing maximum growth was only as effective as red and blue light when the photon flux density in either the red or blue portion of the white light spectrum was equivalent to that of a red or of blue light treatment which produced maximum growth rates. These differences in growth and pigmentation indicate that P. mariae‐lebouriae responds to the spectral quality under which it is grown.