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NO 3 − , PO 4 3 − and SO 4 2 − deprivation reduced LKT1 ‐mediated low‐affinity K + uptake and SKOR ‐mediated K + translocation in tomato and Arabidopsis plants
Author(s) -
Ródenas Reyes,
GarcíaLegaz Manuel Francisco,
LópezGómez Elvira,
Martínez Vicente,
Rubio Francisco,
Ángeles Botella M.
Publication year - 2017
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/ppl.12558
Subject(s) - chromosomal translocation , arabidopsis , nutrient , chemistry , shoot , gene , biology , biochemistry , botany , mutant , organic chemistry
Regulation of essential macronutrients acquisition by plants in response to their availability is a key process for plant adaptation to changing environments. Here we show in tomato and Arabidopsis plants that when they are subjected to NO 3 − , PO 4 3 − and SO 4 2 − deprivation, low‐affinity K + uptake and K + translocation to the shoot are reduced. In parallel, these nutritional deficiencies produce reductions in the messenger levels of the genes encoding the main systems for low‐affinity K + uptake and K + translocation, i.e. AKT1 and SKOR in Arabidopsis and LKT1 and the tomato homolog of SKOR , SlSKOR in tomato, respectively. The results suggest that the shortage of one nutrient produces a general downregulation of the acquisition of other nutrients. In the case of K + nutrient, one of the mechanisms for such a response resides in the transcriptional repression of the genes encoding the systems for K + uptake and translocation.