title: Uptake of iron by a vegetable; kaiware daikon (Japanese radish sprout).
abstract: Uptake of iron and several other minerals into kaiware daikon (Japanese radish sprout) was investigated by changing their supplementary conditions. The supplementation of calcium sulfate (0.1% (w/v), 230 ppm as calcium ion) and iron (III) chloride (0.1% (w/v), 200 ppm as iron ion) in hydroponics promoted the growth of kaiware daikon ca. 1.0-1.5 cm longer than the control group of no additions, while magnesium sulfate (0.1% (w/ v), 100 ppm as magnesium ion) did not affect the length of sprouts so much, but caused their leaves to grow a little wider. Mineral contents in the sprout were maximal when it was added, at ca. 0.1% (w/v), to the hydroponic solution. In tests regarding iron (II) ion supplementation, the color of the kaiware daikon seeds changed from brownish to black and the sprout did not grow well. In contrast, the iron (III) ion did not affect their color and promoted growth of the sprout. When the seeds were soaked in an iron (II) sulfate (75 ppm) or an ammonium iron (III) citrate (180 ppm) solution for 24 h prior to germination, the resulting kaiware daikon contained a few times higher the amount of iron than commercially available ones.
authors.affiliation: Graduate School of Education, Hiroshima University, Kagamiyama, Higashi-Hiroshima, Japan.
authors.forename: Chika
authors.initials: C
authors.lastname: Saiki
authors.forename: Rie
authors.initials: R
authors.lastname: Hirasawa
authors.forename: Chie
authors.initials: C
authors.lastname: Sadayasu
authors.forename: Sachiko
authors.initials: S
authors.lastname: Yamashiro
authors.forename: Mihoko
authors.initials: M
authors.lastname: Tominaga
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Sato
mesh_terms: D000042:Absorption; D001682:Biological Availability; D002133:Calcium Sulfate / Q000493:pharmacokinetics; D003116:Color; D019587:Dietary Supplements; D004305:Dose-Response Relationship, Drug; D005527:Food, Fortified; D006801:Humans; D007501:Iron / Q000493:pharmacokinetics*; D058085:Iron Compounds / Q000493:pharmacokinetics; D007564:Japan; D008278:Magnesium Sulfate / Q000493:pharmacokinetics; D031224:Raphanus / Q000254:growth & development / Q000378:metabolism*; D012639:Seeds / Q000254:growth & development / Q000378:metabolism
chemical_list: D058085:Iron Compounds; D008278:Magnesium Sulfate; D007501:Iron; D002133:Calcium Sulfate