Short day length-induced decrease of cesium uptake without altering potassium uptake manner in poplar

• Published in: Scientific reports Vol. 6; no. 1; p. 38360
• Main Authors: Noda, Yusaku, Furukawa, Jun, Aohara, Tsutomu, Nihei, Naoto, Hirose, Atsushi, Tanoi, Keitaro, Nakanishi, Tomoko M., Satoh, Shinobu
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 07.12.2016; Nature Publishing Group
• Subjects: 38/39; 631/449/1659; 631/449/1736; Biological Transport - radiation effects; Cation Transport Proteins - genetics; Cation Transport Proteins - metabolism; Cesium; Cesium - metabolism; Chimera; Gardens & gardening; Gene Expression Regulation, Plant; Humanities and Social Sciences; Ion Transport; Light; Localization; multidisciplinary; Photoperiod; Plant Leaves - genetics; Plant Leaves - growth & development; Plant Leaves - metabolism; Plant Leaves - radiation effects; Plant Proteins - genetics; Plant Proteins - metabolism; Plant Roots - genetics; Plant Roots - growth & development; Plant Roots - metabolism; Plant Roots - radiation effects; Plant Stems - genetics; Plant Stems - growth & development; Plant Stems - metabolism; Plant Stems - radiation effects; Populus - genetics; Populus - growth & development; Populus - metabolism; Populus - radiation effects; Potassium; Potassium - metabolism; Rhizosphere; Science
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/srep38360

Short day length-induced alteration of potassium (K) localization in perennial trees is believed to be a mechanism for surviving and adapting to severe winters. To investigate the relationship between cesium (Cs) and K localizations, a model tree poplar, hybrid aspen T89, was employed. Under short day length conditions, the amount of 137 Cs absorbed through the root and translocated to the root was drastically reduced, but 42 K was not. Potassium uptake from the rhizosphere is mediated mainly by KUP/HAK/KT and CNGC transporters. In poplar, however, these genes were constantly expressed under short-day conditions except for a slight increase in the expression a KUP/HAK/KT gene six weeks after the onset of the short-day treatment. These results indicated that the suppression of 137 Cs uptake was triggered by short day length but not regulated by competitive Cs + and K + transport. We hypothesize that there are separately regulated Cs + and K + transport systems in poplar.