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Functional Plant Biology Functional Plant Biology Society
Plant function and evolutionary biology
RESEARCH ARTICLE

Sequence and Expression of a Caffeic Acid O-Methyl Transferase Cdna Homologue in the Tropical Forage Legume Stylosanthes Humilis.

CL Mcintyre, AL Rae, MD Curtis and JM Manners

Australian Journal of Plant Physiology 22(3) 471 - 478
Published: 1995

Abstract

The isolation and characterisation of a cDNA encoding a caffeic acid 0-methyl transferase cDNA homologue (COMT) from Stylosanthes humilis are described. The clone is 1391 nucleotides in length, with an open reading frame encoding a predicted protein of 366 amino acids. Cluster analysis of the deduced amino acid sequence revealed extensive homology to other published O-methyl transferase sequences. Maximum levels of homology were seen with COMTs from alfalfa (87%) and aspen (84%). Southern analysis suggested that this enzyme is encoded by two genes in S. humilis. The mRNA is most strongly expressed in stem tissue, with intermediate levels of expression in young leaves and roots, and does not appear to be induced upon fungal infection or wounding.

https://doi.org/10.1071/PP9950471

© CSIRO 1995

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