Relationships between amino acid contents and peroxidase isozymes in leaf blades of mulberry (Morus spp.)

Abstract

Varietal differences of amino acid contents and total nitrogen content were determined in the leaf blades of mulberry (Morus spp.) which is the food source of the silkworm. Between the peroxidase isozyme genotypes, Px11Px11 or Px11Px11 and Px12Px12, there were significant differences at the 1% level in total amino acid content and contents of threonine, aspartic acid and serine, at the 5% levelin contents of isoleucine, glycine and phenylalanine. All of these amino acid contents were higher in Px11Px11 and Px11Px11Px11 than in Px12Px12. But there was no significant difference in contents of the other amino acids and total nitrogen between the genotypes.