Arrested development in Fucus spiralis (Phaeophyceae) germlings exposed to copper.

Bond, Peter, Brown, Murray, Moate, Roy, Gledhill, Martha , Hill, Stephen and Nimmo, Malcolm (1999) Arrested development in Fucus spiralis (Phaeophyceae) germlings exposed to copper. European Journal of Phycology, 34 (5). pp. 513-521. DOI 10.1080/09541449910001718871.

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Abstract

Exposure of Fucus spiralis germlings to precise copper concentrations (0 to 844 nM Cu2+) in chemically defined medium demonstrated a relationship between urltrastructural changes and growth retardation with increasing copper concentration. Electron-translucent vesicles, present in ova, which normally disappear after fertilization, accumulated in germlings exposed to Cu2+ above 10.6 nM, suggesting that copper may inhibit a metabolic pathway involved in cell wall formation which is initiated by fertilization No membrane damage was observed during the exposure period. During a post-exposure period in copper-free medium, recovery occurred (rhizoid extension, apical hair formation) in germlings previously exposed to concentrations below 106 nM Cu2+ and electron-translucent vesicles became granular and disappeared. It is proposed that the electron-translucent vesicles contain a cell wall precursor and that copper inhibits its incorporation into the cell wall, preventing growth and development of the zygote.

Document Type: Article
Keywords: copper; electron-translucent vesicles; Fucus spiralis; germlings; ultrastructure
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1080/09541449910001718871
ISSN: 0967-0262
Date Deposited: 15 Sep 2015 11:19
Last Modified: 30 May 2017 09:21
URI: http://oceanrep.geomar.de/id/eprint/29682

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