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Heat shock proteins in maize.

P Cooper1, T H Ho

  • 1Department of Botany, University of Illinois, Urbana, Illinois 61801.

Plant Physiology
|February 1, 1983
PubMed
Summary
This summary is machine-generated.

Maize seedlings rapidly synthesize heat shock proteins (hsp) when exposed to elevated temperatures. Different temperatures induce distinct heat shock protein synthesis patterns, suggesting varied plant responses to heat stress.

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Area of Science:

  • Plant Molecular Biology
  • Biochemistry
  • Stress Physiology

Background:

  • Plant seedlings exhibit altered protein synthesis patterns under environmental stress.
  • Heat shock triggers specific protein responses in many organisms, including plants.

Purpose of the Study:

  • To investigate the protein synthesis changes in maize roots in response to elevated temperatures.
  • To identify and characterize heat shock proteins (hsp) induced by heat stress in Zea mays.

Main Methods:

  • One-dimensional sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) of proteins from maize roots.
  • Analysis of protein synthesis patterns at different incubation temperatures (25°C, 40°C, 45°C).
  • Autoradiography to visualize newly synthesized proteins.

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Main Results:

  • A shift from 25°C to 40°C induced ten specific heat shock proteins (hsp) within 20 minutes.
  • Hsp synthesis was transient, declining after prolonged heat exposure, with the appearance of other polypeptides.
  • A shift to 45°C induced a different set of four proteins and suppressed the synthesis of the 10 hsp observed at 40°C.

Conclusions:

  • Maize roots exhibit distinct protein synthesis responses to different elevated temperatures.
  • The observed protein patterns suggest at least two different high-temperature response mechanisms in maize.
  • These findings contribute to understanding plant adaptation to thermal stress.