Seasonal variation of gut Cyanophyta contents and liver GST expression of mud carp Cirrhina molitorella and Nile tilapia Oreochromis niloticus in the tropical Xiangang Reservoir Huizhou, ChinaReportar como inadecuado




Seasonal variation of gut Cyanophyta contents and liver GST expression of mud carp Cirrhina molitorella and Nile tilapia Oreochromis niloticus in the tropical Xiangang Reservoir Huizhou, China - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Chinese Science Bulletin

, Volume 57, Issue 6, pp 615–622

First Online: 08 December 2011Received: 09 September 2011Accepted: 11 October 2011

Abstract

Liver glutathione S-transferase GST plays a major role in the detoxification of microcystins MCs via conjugation to glutathione GSH. We evaluated the relationship between seasonal variation in fish gut contents and the expression of GST isoforms in mud carp Cirrhina molitorella and Nile tilapia Oreochromis niloticus. We quantified the abundance and diversity of plankton in the water column and foregut of mud carp and Nile tilapia in the tropical Xiangang Reservoir between October 2007 and July 2008. The mRNA expression of 7 liver GST isoforms was determined by real-time RT-PCR. The gut contents of both species were dependent on the amount and type of phytoplankton and zooplankton in the water. The expression of liver GST genes in Nile tilapia and mud carp was positively and negatively correlated, respectively, with the abundance of toxic cyanobacteria in the fore-gut. The expression of liver GST mRNA was correlated to the abundance of toxic cyanobacteria in the gut contents of both species, suggesting that mRNA expression of GST isoforms could be used as a biomarker in Nile tilapia and mud carp to monitor cyanobacteria blooms in reservoirs.

Keywordsglutathione S-transferase seasonal variation Cirrhina molitorella Oreochromis niloticus fish gut Cyanophyta content This article is published with open access at Springerlink.com

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Autor: WeiXuan Cheng - XuFang Liang - Dan Shen - Qiong Zhou - Yan He - Shan He - GuangYu Li

Fuente: https://link.springer.com/article/10.1007/s11434-011-4871-7



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