Accumulation of microcystin congeners in different aquatic plants and crops - A case study from lake Amatitl谩n, Guatemala

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• 作者：Claudia Suseth Romero-Oliva ^{claususeth@mailbox.tu-berlin.de" class="auth_mail} ; Valeska Contardo-Jara ^{valeska.contardo@mailbox.tu-berlin.de" class="auth_mail} ; Tobias Block ^{tobifromtheblock@gmail.com" class="auth_mail} ; Stephan Pflugmacher ; ^{stephan.pflugmacher@tu-berlin.de" class="auth_mail}
• 关键词：Aquatic plant ; Microcystin congeners ; Uptake ; Accumulation ; Bioconcentration factor
• 刊名：Ecotoxicology and Environmental Safety
• 出版年：April, 2014
• 年：2014
• 卷：102
• 期：Complete
• 页码：121-128
• 全文大小：832 K

文摘

Microcystins (MCs) fate in natural environments can lead to its transfer into aquatic organisms, e.g. aquatic plants. Moreover, lakes in several countries sustain agriculture activities posing a serious health threat for the public. The case of Lake Amatitl谩n in Guatemala, was addressed to better understand MCs accumulation of four aquatic plants (Polygonum portoricensis, Eichhornia crassipes, Typha sp. and Hydrilla verticillata) coexisting with Microcystis aeruginosa blooms. These findings were further corroborated with an uptake/accumulation laboratory study. Finally crop products (Solanum lycopersicum and Capsicum annuum) irrigated with lake water were also evaluated for MCs. The obtained results suggest that Lake Amatitl谩n is highly contaminated with MCs (intra- and extracellular 1931 and 90 碌g/L, respectively). In fruits of S. lycopersicum and C. annuum a concentration of 1.16 and 1.03 碌g/kg dry weight (DW), respectively could be detected. All four aquatic plants showed a high MCs uptake capacity based on obtained bioconcentration factors (BCF) 165, 18, 16 and 11, respectively. These results were further corroborated in a laboratory study with 30 percent of total MCs taken up by H. verticillata within just 7 days. Additionally it was evidenced that all plants accumulated more MC-LR than other MCs congeners. Monitoring of crop products irrigated with lake water needs further consideration.