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Chemotaxis of Pseudomonas sp. to caffeine and related methylxanthines

✍ Scribed by Swati Sucharita Dash; Nori Sri Sailaja; Sathyanarayana N. Gummadi

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
133 KB
Volume
48
Category
Article
ISSN
0233-111X

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✦ Synopsis

Abstract

Pseudomonas sp. isolated from soil of coffee plantation area has been shown to degrade higher concentrations of caffeine (∼15 g l^–1^) by N‐demethylation at a rate higher than what has been reported for any strain so far. This strain exhibits positive chemotaxis towards caffeine (1,3,7‐trimethylxanthine) in swarm plate assay and modified capillary assay in a dose dependant manner. Related methylxanthines and xanthine also act as chemoattractants for the strain with the highest relative chemotactic response (RCR) seen for xanthine. Chemotaxis in Pseudomonas sp. is possibly plasmid mediated as indicated by positive chemotaxis of plasmid transformed E. coli DH5Ξ±. The chemotactic abilities of Pseudomonas sp. combined with higher rates of degradation of caffeine can be used in the development of strategies for biodecaffeination of caffeine containing wastes. (Β© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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