Effects of Imidazolium Ionic Liquids on Growth, Photosynthetic Efficiency, and Cellular Components of the Diatoms Skeletonema marinoi and Phaeodactylum tricornutum

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• 作者：Chiara Samori虁 ; Giorgia Sciutto ; Laura Pezzolesi ; Paola Galletti ; Franca Guerrini ; Rocco Mazzeo ; Rossella Pistocchi ; Silvia Prati ; Emilio Tagliavini
• 刊名：Chemical Research in Toxicology
• 出版年：2011
• 出版时间：March 21, 2011
• 年：2011
• 卷：24
• 期：3
• 页码：392-401
• 全文大小：1014K
• 年卷期：v.24,no.3(March 21, 2011)
• ISSN：1520-5010

文摘

This article describes the toxic effects of imidazolium ionic liquids bearing alkyl (BMIM), monoethoxy (MOEMIM), and diethoxy (M(OE)₂MIM) side chains toward two marine diatoms, Skeletonema marinoi and Phaeodactylum tricornutum. MOEMIM and M(OE)₂MIM cations showed a lower inhibition of growth and photosynthetic efficiency with respect to their alkyl counterpart, with both algal species. However, a large difference in sensitivity was found between S. marinoi and P. tricornutum, the first being much more sensitive to the action of ionic liquids than the second one. The effects of salinity on BMIM Cl toxicity toward S. marinoi revealed that a decrease from salinity 35 to salinity 15 does not influence the biological effects toward the alga. Finally, Fourier transform infrared (FT-IR) microscopy of algal cells after ionic liquids exposure allowed us to detect an alteration of the organic cellular components related to silica uptake and organization. On the basis of these results, the different behavior of the two diatom species can be tentatively ascribed to different silica uptake and organization in outer cell walls.