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Plant Molecular Biology

, Volume 19, Issue 3, pp 381–389 | Cite as

PCR amplification and sequences of cDNA clones for the small and large subunits of ADP-glucose pyrophosphorylase from barley tissues

  • Per Villand
  • Reidunn Aalen
  • Odd-Arne Olsen
  • Ernst Lüthi
  • Anders Lönneborg
  • Leszek A. Kleczkowski
Research Articles

Abstract

Several cDNAs encoding the small and large subunit of ADP-glucose pyrophosphorylase (AGP) were isolated from total RNA of the starchy endosperm, roots and leaves of barley by polymerase chain reaction (PCR). Sets of degenerate oligonucleotide primers, based on previously published conserved amino acid sequences of plant AGP, were used for synthesis and amplification of the cDNAs. For either the endosperm, roots and leaves, the restriction analysis of PCR products (ca. 550 nucleotides each) has revealed heterogeneity, suggesting presence of three transcripts for AGP in the endosperm and roots, and up to two AGP transcripts in the leaf tissue. Based on the derived amino acid sequences, two clones from the endosperm, beps and bepl, were identified as coding for the small and large subunit of AGP, respectively, while a leaf transcript (blpl) encoded the putative large subunit of AGP. There was about 50% identity between the endosperm clones, and both of them were about 60% identical to the leaf cDNA. Northern blot analysis has indicated that beps and bepl are expressed in both the endosperm and roots, while blpl is detectable only in leaves. Application of the PCR technique in studies on gene structure and gene expression of plant AGP is discussed.

Key words

ADP-glucose pyrophosphorylase barley endosperm PCR cDNA 

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Copyright information

© Kluwer Academic Publishers 1992

Authors and Affiliations

  • Per Villand
    • 1
  • Reidunn Aalen
    • 1
  • Odd-Arne Olsen
    • 1
  • Ernst Lüthi
    • 1
  • Anders Lönneborg
    • 1
  • Leszek A. Kleczkowski
    • 1
  1. 1.Plant Molecular Biology LaboratoryNLVFNorway

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