title: Water and potassium ion absorption by deuterium oxide resistant winter rye seedlings.
abstract: The concentrations of deuterium oxide (D2O) in the root tissue water of winter rye seedlings equilibrated with the external D2O concentration within 30 min and in the shoot tissue water after 5-6 h. The equilibrated value in the root water was 87% and in the shoot water, 55% of the external concentration. The K+ absorption rate of the seedlings decreased from a value of 39 to 18 mumol g-1 h-1 when the D2O concentration was changed through a range from 0% to 97%. D2O suppressed the absorption of water and K+ by the seedlings. The higher the D2O concentration the greater the suppression, but it was less than with similarly treated rice plants. However, the process of D2O absorption by the seedlings was similar to that of rice seedlings (Envir. exp. Bot., 24, 369).
authors.forename: S
authors.initials: S
authors.lastname: Shibabe
authors.forename: K
authors.initials: K
authors.lastname: Yoda
mesh_terms: D000042:Absorption; D003903:Deuterium / Q000378:metabolism / Q000494:pharmacology; D017666:Deuterium Oxide; D002523:Edible Grain / Q000378:metabolism*; D007477:Ions; D011188:Potassium / Q000378:metabolism*; D012434:Secale / Q000378:metabolism*; D014867:Water / Q000378:metabolism* / Q000494:pharmacology
chemical_list: D007477:Ions; D014867:Water; D003903:Deuterium; D017666:Deuterium Oxide; D011188:Potassium