Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Genetic and physiological variation in pigment composition of Emiliania huxleyi (Prymnesiophyceae) and the potential use of its pigment ratios as a quantitative physiological marker
Autore:
Stolte, W; Kraay, GW; Noordeloos, AAM; Riegman, R;
Indirizzi:
Netherlands Inst Sea Res, Dept Biol Oceanog, NL-1790 AB Den Burg, Netherlands Netherlands Inst Sea Res Den Burg Netherlands NL-1790 AB rg, Netherlands
Titolo Testata:
JOURNAL OF PHYCOLOGY
fascicolo: 3, volume: 36, anno: 2000,
pagine: 529 - 539
SICI:
0022-3646(200006)36:3<529:GAPVIP>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
PERFORMANCE LIQUID-CHROMATOGRAPHY; DIATOM SKELETONEMA-COSTATUM; MARINE DIATOM; PHOTOSYNTHETIC MEMBRANES; COMMUNITY STRUCTURE; PHYTOPLANKTON; LIGHT; CAROTENOIDS; WATERS; STRAINS;
Keywords:
chemostat; genetic variation; light limitation; nutrient limitation; pigments; turbidostat;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Stolte, W Univ Kalmar, Dept Marine Sci, POB 905, S-39129 Kalmar, Sweden Univ Kalmar POB 905 Kalmar Sweden S-39129 -39129 Kalmar, Sweden
Citazione:
W. Stolte et al., "Genetic and physiological variation in pigment composition of Emiliania huxleyi (Prymnesiophyceae) and the potential use of its pigment ratios as a quantitative physiological marker", J PHYCOLOGY, 36(3), 2000, pp. 529-539

Abstract

Genetic variation of pigment composition was studied in 16 different strains of Emiliania huxleyi (Lohm. ) Hay et Mohler in batch culture. Distinct strain-dependent differences were found in the ratios of fucoxanthin, 19'-hexanoyloxyfucoxanthin, and 19'-butanoyloxyfucoxanthin, hampering the use of these individual pigments as a taxonomic marker at the species level. The molar ratio of total carotenoids to chl a, however, was constant for all strains tested. In addition, the pigment composition of one axenic strain (L) of E. huxleyi at different growth rates in light-, nitrate-, and phosphate-limited continuous cultures tvas analyzed quantitatively. The pigments fucoxanthin and 19'-hexanoloxyfucoxanthin correlated closely under all conditions. From steady-state rate calculations, it is hypothesized that 19'-hexanoyloxyfucoxanthin is synthesized from fucoxanthin, with light as a modulatingfactor. The net rate of synthesis of diatoxanthin depended both on the concentration of diadinoxanthin (its partner in the xanthophyll cycle) and on light, illustrating its photoprotective function in the xanthophyll cycle. In axenic strain L, the ratio of total fucoxanthins to chl a correlated strongly with photon flux density and can potentially be used to assess the physiological status with respect to irradiance in field populations. In multispecific bloom situations, the ratio of diadinoxanthin plus diatoxanthin to total fucoxanthins could be used as an alternative indicator for the light-dependent physiological state of E. huxleyi, provided that no other chromophytes are present. Application of these correlations to mesocosm data from the literature has so far provided no evidence that E. huxleyi blooms form only at inhibiting light levels, as previously suggested.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 20:44:06