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标题：Short day length-induced decrease of cesium uptake without altering potassium uptake manner in poplar
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作者：Yusaku Noda ; Jun Furukawa ; Tsutomu Aohara 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2016
卷号：6
期号：1
DOI：10.1038/srep38360
语种：English
出版社：Springer Nature
摘要：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.