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Related Experiment Video

Updated: May 5, 2026

Measuring Gene Expression in Bombarded Barley Aleurone Layers with Increased Throughput
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RNA complementary to α-amylase mRNA in barley.

J C Rogers1

  • 1Division of Hematology/Oncology, Department of Internal Medicine, Washington University School of Medicine, Box 8125, 63110, St. Louis, MO, USA.

Plant Molecular Biology
|November 26, 2013
PubMed
Summary

Two types of RNA complementary to alpha-amylase messenger RNA (mRNA) were found in barley. These RNAs, identified through nuclease assays and Northern blots, play a role in gene regulation within specific plant tissues.

Area of Science:

  • Plant Molecular Biology
  • Gene Regulation
  • Biochemistry

Background:

  • Alpha-amylase is a key enzyme in starch metabolism in plants.
  • Antisense RNAs are known regulators of gene expression.
  • Understanding gene regulation in barley endosperm is crucial for crop improvement.

Purpose of the Study:

  • To identify and characterize RNA molecules complementary to alpha-amylase mRNA in barley.
  • To investigate the tissue-specific expression and abundance of these complementary RNAs.
  • To differentiate between various types of complementary RNAs using different experimental techniques.

Main Methods:

  • S1 nuclease assays to detect full-length complementary RNA.
  • Northern blot analysis with antisense-specific probes to identify other complementary RNA species.

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  • RNA-DNA hybrid electrophoresis.
  • Analysis of gene expression in different barley tissues (endosperm, aleurone, shoot, root).

    • Main Results:

    • Two distinct types of RNA complementary to alpha-amylase mRNA were identified.
    • One type, detected by S1 nuclease assay, shows complementarity to most of the alpha-amylase mRNA and is abundant in aleurone tissue, especially with abscisic acid treatment.
    • A second type, detected by Northern blot, consists of discrete species (1.6, 1.4, and 1.0 kb) found in aleurone and shoot tissues.

    Conclusions:

    • Barley possesses multiple types of antisense RNAs targeting alpha-amylase mRNA.
    • These RNAs exhibit differential expression patterns and are likely involved in regulating alpha-amylase gene expression.
    • The distinct results from nuclease protection and hybridization assays highlight the importance of method choice in detecting complementary RNAs with varying complementarity regions.