title: Barley (Hordeum vulgare L.) low phytic acid 1-1: an endosperm-specific, filial determinant of seed total phosphorus.
abstract: Inositol hexaphosphate (Ins P6 or "phytic acid") typically accounts for 75 (± 10%) of seed total phosphorus (P). In some cases, genetic blocks in seed Ins P6 accumulation can also alter the distribution or total amount of seed P. In nonmutant barley (Hordeum vulgare L.) caryopses, ~80% of Ins P6 and total P accumulate in the aleurone layer, the outer layer of the endosperm, with the remainder in the germ. In barley low phytic acid 1-1 (Hvlpa1-1) seed, both endosperm Ins P6 and total P are reduced (~45% and ~25%, respectively), but germs are phenotypically wild type. This translates into a net reduction in whole-seed total P of ~15%. Nutrient culture studies demonstrate that the reduction in endosperm total P is not due to a reduction in the uptake of P into the maternal plant. Genetic tests (analyses of testcross and F2 seed) reveal that the Hvlpa1-1 genotype of the filial seed conditions the seed total P reduction; sibling seed in the same head of barley that differ in their Hvlpa1-1 genotype (heterozygous vs. homozygous recessive) differ in their total P (normal vs. reduced, respectively). Therefore, Hvlpa1 functions as a seed-specific or filial determinant of barley endosperm total P.
authors: From the USDA Agricultural Research Service, Small Grains and Potato Research Unit, 1691 South 2700 West, Aberdeen, ID 83210 (Raboy, Cichy, Peterson, and Reichman); the Department of Agronomy, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, Thailand (Sompong and Srinives); and the Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan (Saneoka). victor.raboy@ars.usda.gov.
authors: Victor
authors: V
authors: Raboy
authors: From the USDA Agricultural Research Service, Small Grains and Potato Research Unit, 1691 South 2700 West, Aberdeen, ID 83210 (Raboy, Cichy, Peterson, and Reichman); the Department of Agronomy, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, Thailand (Sompong and Srinives); and the Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan (Saneoka).
authors: Karen
authors: K
authors: Cichy
authors: From the USDA Agricultural Research Service, Small Grains and Potato Research Unit, 1691 South 2700 West, Aberdeen, ID 83210 (Raboy, Cichy, Peterson, and Reichman); the Department of Agronomy, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, Thailand (Sompong and Srinives); and the Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan (Saneoka).
authors: Kevin
authors: K
authors: Peterson
authors: From the USDA Agricultural Research Service, Small Grains and Potato Research Unit, 1691 South 2700 West, Aberdeen, ID 83210 (Raboy, Cichy, Peterson, and Reichman); the Department of Agronomy, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, Thailand (Sompong and Srinives); and the Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan (Saneoka).
authors: Sarah
authors: S
authors: Reichman
authors: From the USDA Agricultural Research Service, Small Grains and Potato Research Unit, 1691 South 2700 West, Aberdeen, ID 83210 (Raboy, Cichy, Peterson, and Reichman); the Department of Agronomy, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, Thailand (Sompong and Srinives); and the Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan (Saneoka).
authors: Utumporn
authors: U
authors: Sompong
authors: From the USDA Agricultural Research Service, Small Grains and Potato Research Unit, 1691 South 2700 West, Aberdeen, ID 83210 (Raboy, Cichy, Peterson, and Reichman); the Department of Agronomy, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, Thailand (Sompong and Srinives); and the Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan (Saneoka).
authors: Peerasak
authors: P
authors: Srinives
authors: From the USDA Agricultural Research Service, Small Grains and Potato Research Unit, 1691 South 2700 West, Aberdeen, ID 83210 (Raboy, Cichy, Peterson, and Reichman); the Department of Agronomy, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, Thailand (Sompong and Srinives); and the Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan (Saneoka).
authors: Hirofumi
authors: H
authors: Saneoka
mesh_terms: D056625:Endosperm / Q000737:chemistry*; D005838:Genotype; D001467:Hordeum / Q000737:chemistry / Q000235:genetics*; D010758:Phosphorus / Q000737:chemistry*; D010833:Phytic Acid / Q000737:chemistry*
chemical_list: D010758:Phosphorus; D010833:Phytic Acid
keywords: inositol hexaphosphate; seed total P genetics