Genotypic Differences in the Effect of P Fertilization on Phytic Acid Content in Rice Grain.

Phytic acid (PA) prevents the absorption of minerals in the human intestine, and it is regarded as an antinutrient. Low PA rice is beneficial because of its higher Zn bioavailability and it is suggested that the gene expression level of -inositol 3-phosphate synthase 1 () in developing grain is a key factor to explain the genotypic difference in PA accumulation among natural variants of rice. P fertilization is also considered to affect the PA content, but it is not clear how it affects gene expression and the PA content in different genotypes.