Ecology

Data from Mahidol University Advance Knowledge in Biology

  2012 AUG 10 (VerticalNews) -- By a News Reporter-Staff News Editor at Ecology, Environment & Conservation -- Fresh data on Biology are presented in a new report. According to news reporting from Bangkok, Thailand, by VerticalNews journalists, research stated, "Cholinesterase (ChE) was characterized in whole bodies of adult riceland prawns, Macrobrachium lanchesteri, based on substrate preference and inhibitor sensitivity. M. lanchesteri ChE activity was mainly attributable to acetylcholinesterase (AChE) since it preferentially hydrolyzed an AChE-specific substrate, acetylthiocholine iodide, over s-butyrylthiocholine iodide and was sensitive to 1,5-bis-(4-allyldimethyl-ammoniumphenyl)-pentan-3-one dibromide, a specific inhibitor for AChE. The effect of chlorpyrifos exposure on M. lanchesteri were also investigated."

  The news correspondents obtained a quote from the research from Mahidol University, "The 24, 48, 72 and 96 h LC50 values for chlorpyrifos were 3.37, 2.76, 2.58 and 2.53 mu g L-1, respectively. Based on these values, adult M. lanchesteri were exposed to 0.5, 1.5, 2.5 and 3.5 mu g chlorpyrifos L-1 for 24, 48, 72 and 96 h. Chlorpyrifos appeared to induce drastic enzymatic responses in M. lanchesteri. AChE activity was inhibited after 24 h of exposure in a dose- and time-dependent manner. The levels of lipid peroxidation increased significantly after 24 h of exposure."

  According to the news reporters, the researchers concluded: "However, the activities of the antioxidant enzyme, catalase, and the detoxification enzyme, glutathione S-transferase, were reduced. M. lanchesteri is sensitive to chlorpyrifos and can serve as a bioindicator species for freshwater environmental assessment."

  For more information on this research see: Enzymatic responses of the riceland prawn, Macrobrachium lanchesteri, to chlorpyrifos exposure. Biologia, 2012;67(4):762-766. Biologia can be contacted at: Versita, Solipska 14A-1, 02-482 Warsaw, Poland. (Springer - www.springer.com; Biologia - www.springerlink.com/content/0006-3088/)

  Our news journalists report that additional information may be obtained by contacting W. Tongbai, Mahidol University, Fac Sci, Dept. of Biol, Bangkok 10400, Thailand.

  Keywords for this news article include: Asia, Bangkok, Biology, Thailand, Enzymes and Coenzymes

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