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Isolation of amyloplasts.

Kay Denyer1, Marilyn Pike

  • 1John Innes Centre, Norwich Research Park, Norwich, Norfolk.

Current Protocols in Cell Biology
|March 25, 2008
PubMed
Summary
This summary is machine-generated.

Researchers detail methods for isolating starch-rich plastids, like amyloplasts, from plants. Protocols assess plastid quality and enzyme distribution, aiding plant cell biology research.

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Area of Science:

  • Plant Cell Biology
  • Biochemistry
  • Molecular Biology

Background:

  • Starch-rich plastids, such as amyloplasts, are crucial for energy storage in plants.
  • Efficient isolation of intact plastids is essential for studying their function and composition.

Purpose of the Study:

  • To describe reliable methods for preparing starch-rich plastids.
  • To provide protocols for assessing plastid yield, purity, and intactness.
  • To offer a method for determining enzyme distribution between plastids and cytosol.

Main Methods:

  • Detailed protocols for isolating amyloplasts from maize endosperm and oilseed rape embryos.
  • Methods for quantifying plastid yield, purity, and intactness.
  • Enzyme assays to determine subcellular distribution.

Main Results:

  • Demonstrated successful isolation of starch-rich plastids using two distinct methods.
  • Established criteria for evaluating the quality of isolated plastids.
  • Presented a quantitative method for enzyme partitioning analysis.

Conclusions:

  • The described protocols are adaptable for isolating starch-rich plastids from various plant organs.
  • These methods provide a robust framework for biochemical studies of plastid function and enzyme localization.