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Related Experiment Videos

A rapid method for isolating glandular trichomes.

E H Yerger1, R A Grazzini, D Hesk

  • 1Department of Entomology, The Pennsylvania State University, University Park, Pennsylvania 16802.

Plant Physiology
|May 1, 1992
PubMed
Summary
This summary is machine-generated.

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A new physical method rapidly isolates plant trichomes for biochemical studies. This technique successfully purified glandular trichomes, revealing unique fatty acids and localizing anacardic acid synthesis.

Area of Science:

  • Plant Biology
  • Biochemistry
  • Molecular Biology

Background:

  • Plant trichomes are crucial for defense and secondary metabolite production.
  • Efficient isolation methods are needed for biochemical and molecular analyses of trichomes.

Purpose of the Study:

  • To develop a rapid physical method for isolating stalked glandular plant trichomes.
  • To assess the quality and utility of isolated trichomes for downstream applications.
  • To investigate the biochemical composition of isolated geranium trichomes.

Main Methods:

  • Developed a technique involving cryogenic grinding of frozen plant tissue with dry ice.
  • Utilized sieving to separate glandular trichome heads from larger fragments.
  • Applied the method to geranium, potato, tomato, squash, and velvetleaf.

Related Experiment Videos

  • Analyzed the fatty acid composition of isolated geranium trichomes.

    • Main Results:

    • Successfully isolated high-quality trichomes suitable for biochemical and molecular studies.
    • Achieved high yield, harvesting 351 mg dry weight of geranium trichomes in 12 hours.
    • Identified unusual omega5-unsaturated fatty acids (23.4% of total) exclusively in geranium glandular trichomes.
    • Demonstrated that supporting tissues lacked these fatty acids.

    Conclusions:

    • The developed method provides a rapid and effective means for plant trichome isolation.
    • Isolated trichomes retain biochemical integrity for enzyme and nucleic acid studies.
    • Omega5-fatty acids and anacardic acid synthesis are localized to glandular trichomes in geraniums.