Biosynthesis of phytosiderophores in several Triticeae species with different genomes

To examine variation in phytosiderophore biosynthesis in Triticeae, phytosi derophores were investigated in wild and cultivated species of wheat and ba rley with different genomes. All wheats tested including hexaploid (AABBDD) , tetraploid (AABB), and diploid (AA or Un) lines produced only one phytosi derophore, 2'-deoxymugineic acid. The phytosiderophores biosynthesized in w ild barleys varied among species. Using substitution-type triticale lines a nd wheat-barley addition lines, it was revealed that, in triticale, genes f or the biosynthesis of both mugineic and hydroxymugineic acids were located in the long arm of chromosome 5R and that, in barley, the gene for product ion of mugineic acid was located in the long arm of chromosome 4H.