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首页> 外文期刊>Environmental Science & Technology >Antifouling Action of Polyisoprene-Based Coatings by Inhibition of Photosynthesis in Microalgae
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Antifouling Action of Polyisoprene-Based Coatings by Inhibition of Photosynthesis in Microalgae

机译：抑制微藻光合作用的聚异戊二烯基涂层的防污作用

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Previous studies have demonstrated that ionic and non-ionic natural rubber-based coatings inhibit adhesion and growth of marine bacteria, fungi, microalgae, and spores of macroaigae. Nevertheless, the mechanism of action of these coatings on the different micro-organisms is not known. In the current study, antifouling activity of a series of these rubber-based coatings (one ionic and two non-ionic) was studied with respect to impacts on marine microalgal photosynthesis using pulse-amplitude-modulation (PAM) fluorescence. When grown in contact with the three different coatings, an inhibition of photosynthetic rate (relative electron transport rate, rETR) was observed in all of the four species of pennate diatoms involved in microfouling, Cocconcis scutellum, Amphora coffeaeformis, Cylindrotheca closterium, and Navicula jeffreyi. The percentage of inhibition ranged from 44% to 100% of the controls, depending on the species and the coating. The ionic coating was the most efficient antifouling (AF) treatment, and C. scutdlum and A coffeaeformis are the most sensitive and tolerant diatoms tested, respectively. Photosynthetic inhibition was reversible, as almost complete recovery of rETR was observed 48 h post exposure, after detachment of cells from the coatings. Thus, the antubuling activity seemed mostly due to an effect of contact with materials. It is hypothesized that photosynthetic activity was suppressed by coatings due to interference in calcium availability to the microalgal cells; Ca~(2+) has been shown to be an essential micro/macro nutrient for photosynthesis, as well as being involved in cell adhesion and motility in pennate diatoms.
机译：先前的研究表明，基于离子和非离子天然橡胶的涂料可抑制海洋细菌，真菌，微藻和大型藻类孢子的粘附和生长。然而，这些涂层对不同微生物的作用机理尚不清楚。在当前的研究中，研究了一系列此类橡胶基涂料（一种离子型和两种非离子型）的防污活性，并利用脉冲幅度调制（PAM）荧光对海洋微藻光合作用的影响进行了研究。当与三种不同的涂层接触生长时，在涉及微结垢的四类羽状硅藻，盾形盾片藻，咖啡油壶，Cylindrotheca closterium和Navicula jeffreyi的所有四种扁藻硅藻中均观察到光合速率（相对电子传输速率，rETR）受到抑制。 。抑制的百分比范围为对照的44％至100％，具体取决于种类和涂层。离子涂层是最有效的防污（AF）处理方法，盾片梭菌和咖啡形甲藻分别是测试的最敏感和耐受性的硅藻。光合作用的抑制作用是可逆的，因为在暴露后48小时，细胞从涂层中脱落后，rETR几乎完全恢复。因此，插拔活动似乎主要是由于与材料接触的影响。据推测，由于钙对微藻细胞的可利用性的干扰，被涂层抑制了光合活性。 Ca〜（2+）已被证明是光合作用必不可少的微/宏营养素，并且参与了戊二烯硅藻的细胞粘附和运动。

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  • 来源
    《Environmental Science & Technology》 |2013年第12期|6573-6581|共9页
  • 作者

    Rachid Jellali; Jacco C. Kromkamp; Irene Campistron; Albert Laguerre; Sebastien Lefebvre; Rupert G. Perkins; Jean-Francois Pilard; Jean-Luc Mouget;

  • 作者单位

    UMR CNRS N° 6283, Methodologie et Synthese des Polymeres, Departement Methodologie et Synthese, Institut des Molecules et des Materiaux du Mans, Universite du Maine, Avenue Olivier Messiaen, 7208S Le Mans Cedex 9, France;

    Department of Marine Microbiology, Royal Netherlands Institute for Sea Research (NIOZ), P.O. Box 149, 4400 AC, Yerseke, The Netherlands;

    UMR CNRS N° 6283, Methodologie et Synthese des Polymeres, Departement Methodologie et Synthese, Institut des Molecules et des Materiaux du Mans, Universite du Maine, Avenue Olivier Messiaen, 7208S Le Mans Cedex 9, France;

    UMR CNRS N° 6283, Methodologie et Synthese des Polymeres, Departement Methodologie et Synthese, Institut des Molecules et des Materiaux du Mans, Universite du Maine, Avenue Olivier Messiaen, 7208S Le Mans Cedex 9, France;

    Universite de Lillel Sciences et Technologies - CNRS, UMR 8187 LOG (Laboratoire d'Oceanologie de Geosciences), Station Marine de Wimereux, 28 av. Foch, 62930 Wimereux, France;

    School of Earth and Ocean Sciences, Cardiff University, Cardiff, Wales CF10 3AT, United Kingdom;

    UMR CNRS N° 6283, Methodologie et Synthese des Polymeres, Departement Methodologie et Synthese, Institut des Molecules et des Materiaux du Mans, Universite du Maine, Avenue Olivier Messiaen, 7208S Le Mans Cedex 9, France;

    EA 2160 (MMS, Mer, Molecules, Sante), Faculte des Sciences, Universite du Maine, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France;

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