Effects of copper on early developmental stages of Lessonia nigrescens Bory (Phaeophyceae)

Loretto Contreras, Matías H. Medina, Santiago Andrade, Valeria Oppliger, Juan A. Correa

Resultado de la investigación: Article

20 Citas (Scopus)

Resumen

Copper effects on the early developmental gametophytic and sporophytic stages of the kelp Lessonia nigrescens were tested in gradients of increasing concentrations of ASV-labile copper. The results demonstrated a high sensitivity to copper of all life-history stages of the alga, where even the lowest tested concentration affected spore release as well as their subsequent settlement. More significant, concentrations higher than 7.87 μg L-1 totally interrupted the development of the spores after they settle. This effect led to a failure in the formation of male and female gametophytes and, as a consequence, to a complete disruption of the normal life cycle of the kelp. Thus, we suggest that the absence of L. nigrescens from copper-enriched environments results from the high sensitivity of its early life cycle stages, which limits growth and maturation of the gametophytic microscopic phase and, as a consequence, prevents development of the macroscopic sporophytic phase.

Idioma originalEnglish
Páginas (desde-hasta)75-83
Número de páginas9
PublicaciónEnvironmental Pollution
Volumen145
N.º1
DOI
EstadoPublished - ene 2007

Huella dactilar

Phaeophyta
Copper
Kelp
Life Cycle Stages
Spores
Life cycle
Ovule
Algae
Pollen
Growth

ASJC Scopus subject areas

  • Toxicology
  • Pollution
  • Health, Toxicology and Mutagenesis
  • Medicine(all)

Citar esto

Contreras, Loretto ; Medina, Matías H. ; Andrade, Santiago ; Oppliger, Valeria ; Correa, Juan A. / Effects of copper on early developmental stages of Lessonia nigrescens Bory (Phaeophyceae). En: Environmental Pollution. 2007 ; Vol. 145, N.º 1. pp. 75-83.
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abstract = "Copper effects on the early developmental gametophytic and sporophytic stages of the kelp Lessonia nigrescens were tested in gradients of increasing concentrations of ASV-labile copper. The results demonstrated a high sensitivity to copper of all life-history stages of the alga, where even the lowest tested concentration affected spore release as well as their subsequent settlement. More significant, concentrations higher than 7.87 μg L-1 totally interrupted the development of the spores after they settle. This effect led to a failure in the formation of male and female gametophytes and, as a consequence, to a complete disruption of the normal life cycle of the kelp. Thus, we suggest that the absence of L. nigrescens from copper-enriched environments results from the high sensitivity of its early life cycle stages, which limits growth and maturation of the gametophytic microscopic phase and, as a consequence, prevents development of the macroscopic sporophytic phase.",
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Effects of copper on early developmental stages of Lessonia nigrescens Bory (Phaeophyceae). / Contreras, Loretto; Medina, Matías H.; Andrade, Santiago; Oppliger, Valeria; Correa, Juan A.

En: Environmental Pollution, Vol. 145, N.º 1, 01.2007, p. 75-83.

Resultado de la investigación: Article

TY - JOUR

T1 - Effects of copper on early developmental stages of Lessonia nigrescens Bory (Phaeophyceae)

AU - Contreras, Loretto

AU - Medina, Matías H.

AU - Andrade, Santiago

AU - Oppliger, Valeria

AU - Correa, Juan A.

PY - 2007/1

Y1 - 2007/1

N2 - Copper effects on the early developmental gametophytic and sporophytic stages of the kelp Lessonia nigrescens were tested in gradients of increasing concentrations of ASV-labile copper. The results demonstrated a high sensitivity to copper of all life-history stages of the alga, where even the lowest tested concentration affected spore release as well as their subsequent settlement. More significant, concentrations higher than 7.87 μg L-1 totally interrupted the development of the spores after they settle. This effect led to a failure in the formation of male and female gametophytes and, as a consequence, to a complete disruption of the normal life cycle of the kelp. Thus, we suggest that the absence of L. nigrescens from copper-enriched environments results from the high sensitivity of its early life cycle stages, which limits growth and maturation of the gametophytic microscopic phase and, as a consequence, prevents development of the macroscopic sporophytic phase.

AB - Copper effects on the early developmental gametophytic and sporophytic stages of the kelp Lessonia nigrescens were tested in gradients of increasing concentrations of ASV-labile copper. The results demonstrated a high sensitivity to copper of all life-history stages of the alga, where even the lowest tested concentration affected spore release as well as their subsequent settlement. More significant, concentrations higher than 7.87 μg L-1 totally interrupted the development of the spores after they settle. This effect led to a failure in the formation of male and female gametophytes and, as a consequence, to a complete disruption of the normal life cycle of the kelp. Thus, we suggest that the absence of L. nigrescens from copper-enriched environments results from the high sensitivity of its early life cycle stages, which limits growth and maturation of the gametophytic microscopic phase and, as a consequence, prevents development of the macroscopic sporophytic phase.

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