alexa Methanotrophs In Saline-alkaline Soils Of The Former Lake Texcoco, Mexico
ISSN: 2155-952X

Journal of Biotechnology & Biomaterials
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5th World Congress on Biotechnology
June 25-27, 2014 Valencia Conference Centre, Valencia, Spain

Nancy Serrano-Silva, C?sar Valenzuela-Encinas, Rodolfo Marsch, Luc Dendooven, Rocio Jand Alc?ntara-Hern?ndez
Accepted Abstracts: J Biotechnol Biomater
DOI: 10.4172/2155-952X.S1.029
Abstract
The former lake of Texcoco is located in the Valley of Mexico City (Mexico). This is a unique and extreme soil, highly saline-sodic, with electrolytic conductivity (EC) up to 150 dS m-1 and pH up to 10.5. The composition of aerobic methane- oxidizing bacteria (MOB) communities was studied in three soils from the former lake Texcoco (Mexico) and compared to that in two arable soils. The MOB was identified on the basis of comparative sequence analysis of the pmoA gene that encodes for a subunit of the particulate methane monooxygenase, a key enzyme in the aerobic methane oxidation process. The sequences from the arable soils belonged to type I and II methanotrophs. The clones were closely related to JR-2, JR-3, USC-γ and USC-α clusters that have previously been detected in upland soils. In the saline alkaline soils, a novel group of sequences related to the Nitrosococcus-like clade was detected (>92% of clones sequenced). These data indicated that the methanotrophic communities in the soil from the former lake Texcoco differed from those in arable soils and further experiments are needed to confirm that the methanotrophic community found in Texcoco soils oxidizes methane under adverse conditions.
Biography
Nancy Serrano-Silva, from Colombia, has been a PhD student since 2010. She is studying in the department of Biotechnology and Bioengineering at CINVESTAV- IPN, Mexico. Her topic of research is the aerobic methane oxidation in soils. Currently she is working in the Laboratory of Soil Ecology of CINVESTAV and she has recently coauthored a review article about Methanogenesis and Methanotrophy in Soil that was accepted for publishing.
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