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Identification and metabolite profiling of Sitophilus oryzae L. by 1D and 2D NMR Spectroscopy

Published online by Cambridge University Press:  09 October 2009

A. Trivedi ,
P. Kaushik  and
A. Pandey
A. Trivedi*
Affiliation:
NMR Laboratory, Division of SAIF, Central Drug Research Institute, Chattar Manzil Palace, Post Box 173, Lucknow-226 001, India
P. Kaushik
Affiliation:
Institute of Pesticide Formulation and Technology, Sector-21, Gurgaon, Haryana-122016, India
A. Pandey
Affiliation:
Department of Zoology, Dayanand Anglo-Vedic College, Civil Lines, Kanpur-208001, (UP), India
*
*Author for correspondence Fax: +91-0512-2559280 E-mail: anky58@gmail.com
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Abstract

The polyphagous insect Sitophilus oryzae L. (Coleoptera:Curculionidae) has a tremendous adaptability in feeding behaviour, making it a serious invasive pest of stored cereals. The present study identifies the metabolite composition of Sitophilus oryzae (S. oryzae) using Nuclear Magnetic Resonance (NMR) spectroscopy. Assignment of 1D-proton by NMR, 1H-1H COSY, 2D-TOCSY 1H-1H, had been done. Amongst the various biochemically important metabolites isoleucine, valine, leucine, β-hydroxybutyrate, lysine, glutamate, glutamine, proline, lactate, alanine, di-methylamine, α-glucose, β-glucose, choline, glycerophosphorylcholine and tyrosine are present in S. oryzae. In wheat-fed S. oryzae, the presence of threonine and the absence of lactate is observed. In rice-fed S. oryzae, however, the presence of lactate and the absence of threonine were observed. Barley-fed S. oryzae shows presence of both tyrosine and lactate. It is concluded that the pest S. oryzae has adaptability on different stored cereals and grains, depicting the presence of earlier reported metabolites. The present study aims to identify the key metabolic components and associated enzymes in Sitophilus oryzae fed on different cereals.

Keywords

NMR spectroscopySitophilus oryzaestored grain pestmetabolites identificationpest control
Type
Research Paper
Information
Bulletin of Entomological Research , Volume 100 , Issue 3 , June 2010 , pp. 287 - 296
Copyright
Copyright © Cambridge University Press 2009

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