Isolation and preliminary characterization of a new maize low phytic acid 1 allele

摘要

Phytic acid, also known as myo-inositol 1-, 2-, 3-, 4-, 5-, and 6-phosphate (IP6), is the major storage form of phosphorous in plants is mainly accumulated in pollen and seeds (up to 4% to 5% of dry weight). In the maize kernel 80% of phytic acid is localized in the scutellum and the remaining 20% is in the aleuronic layer. During germination, phytic acid is idrolized by phytases. Both phytic acid and the cations that it's able to bond are poorly bio-available for monogastric animals due to their lack of phytase activity. One strategy to solve this problem is to isolate cereal mutants to be able to accumulate low level of phytic P and a high level of free phosphate in the seeds.