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Titolo:
EFFECTS OF TEMPERATURE ON GROWTH, LIGHT-ABSORPTION, AND QUANTUM YIELDIN DUNALIELLA-TERTIOLECTA (CHLOROPHYCEAE)
Autore:
SOSIK HM; MITCHELL BG;
Indirizzi:
WOODS HOLE OCEANOG INST,DEPT BIOL,REDFIELD 338 WOODS HOLE MA 02543 UNIV CALIF SAN DIEGO,SCRIPPS INST OCEANOG,DIV MARINE RES LA JOLLA CA 92093
Titolo Testata:
Journal of phycology
fascicolo: 5, volume: 30, anno: 1994,
pagine: 833 - 840
SICI:
0022-3646(1994)30:5<833:EOTOGL>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHOTOSYNTHETIC ENERGY-CONVERSION; DIATOM SKELETONEMA-COSTATUM; STEADY-STATE DESCRIPTION; MARINE-PHYTOPLANKTON; FLUORESCENCE EXCITATION; ALGAL PHOTOSYNTHESIS; NITROGEN LIMITATION; IRRADIANCE; PHOTOADAPTATION; ADAPTATION;
Keywords:
ABSORPTION; CHLOROPHYTA; DUNALIELLA TERTIOLECTA; MODELING PRIMARY PRODUCTION; PHYTOPLANKTON OPTICS; QUANTUM YIELD; TEMPERATURE LIMITATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
43
Recensione:
Indirizzi per estratti:
Citazione:
H.M. Sosik e B.G. Mitchell, "EFFECTS OF TEMPERATURE ON GROWTH, LIGHT-ABSORPTION, AND QUANTUM YIELDIN DUNALIELLA-TERTIOLECTA (CHLOROPHYCEAE)", Journal of phycology, 30(5), 1994, pp. 833-840

Abstract

The effects of growth temperature on the marine chlorophyte Dunaliella tertiolecta Butcher were studied to provide a more mechanistic understanding of the role of environmental factors in regulating bio-optical properties of phytoplankton. Specific attention was focused on quantities that are relevant for modeling of growth and photosynthesis. Characteristics including chlorophyll a (chi a)-specific light absorption(a(ph)(lambda)), C:chl a ratio, and quantum yield for growth (phi(mu)) varied as functions of temperature under conditions of excess lightand nutrients. As temperature increased over the range examined (12 degrees-28 degrees C), intracellular concentrations of chl a increased by a factor of 2 and a(ph)(lambda) values decreased by more than 50% at blue to green wavelengths. The lower values of a(ph)(lambda) were due to both a decrease in the abundance of accessory pigments relativeto chi a and an increase in pigment package effects arising from higher intracellular pigment concentrations. Intracellular pigment concentration increased as a consequence of higher cellular pigment quotas combined with lower cell volume. At high growth temperatures, slightly more light was absorbed on a per-cell-C basis, but the dramatic increases in growth rate from mu = 0.5 d(-1) at 12 degrees C to mu = 2.2 d(-1) at 28 degrees C were primarily due to an increase in phi(mu) (0.015-0.041 mol C (mol quanta)(-1)). By comparison with previous work on this species, we conclude the effects of temperature on a(ph)(lambda) and phi(mu) are comparable to those observed for light and nutrient limitation. Patterns of variability in a(ph)(lambda) and phi(mu) as a function of growth rate at different temperatures

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Documento generato il 22/09/20 alle ore 18:56:15