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Related Experiment Videos

Samaderin B and C from Samadera indica.

R Malathi1, S S Rajan, G Suresh

  • 1Department of Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600 025, India.

Acta Crystallographica. Section C, Crystal Structure Communications
|August 12, 2003
PubMed
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Two compounds, samaderin B and samaderin C, isolated from Samadera indica seeds, demonstrated antifeedant properties against Spodoptera litura larvae. Structural differences influence their crystal packing but not overall conformation.

Area of Science:

  • Natural Products Chemistry
  • Insect Chemical Ecology
  • Organic Chemistry

Background:

  • Samadera indica seed kernels are a source of bioactive compounds.
  • Insect antifeedant compounds play a crucial role in pest management strategies.
  • Understanding structure-activity relationships is key to developing new pest control agents.

Purpose of the Study:

  • To isolate and characterize compounds from Samadera indica seed kernels.
  • To evaluate the antifeedant activity of isolated compounds against Spodoptera litura.
  • To investigate the structural and conformational differences between samaderin B and samaderin C.

Main Methods:

  • Isolation and purification of samaderin B and samaderin C from Samadera indica.
  • Bioassays to determine antifeedant activity against Spodoptera litura third-instar larvae.

Related Experiment Videos

  • Spectroscopic analysis and X-ray crystallography to elucidate structures and crystal packing.

    • Main Results:

    • Samaderin B and samaderin C were successfully isolated and identified.
    • Both compounds exhibited significant antifeedant activity against Spodoptera litura.
    • A hydroxyl group substitution in samaderin C, compared to samaderin B, caused localized conformational changes and altered crystal packing.

    Conclusions:

    • Samaderin B and C are potent antifeedants from Samadera indica.
    • The structural modifications influence the solid-state properties of these compounds.
    • These findings contribute to the understanding of natural product-based insect pest control.