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

doi:10.1038/srep38360

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

2016-12-07

16

OA

AI

DOI：10.1038/srep38360

Original

Save

View PDF

Abstract

En 中文

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 Cs-137 absorbed through the root and translocated to the root was drastically reduced, but K-42 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 137Cs 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.

Keywords:

COLD-ACCLIMATION

GENE FAMILY

ARABIDOPSIS

TRANSPORTER

K+

MECHANISMS

ROOT

TRANSLOCATION

EXPRESSION

TOLERANCE

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

Abstract

AI Summary

Journal

Organization