Abstract
Potassium (K+
) is one of the vital macronutrients for the plant kingdom. It constitutes almost 10% of total plant biomass.
Therefore, it is evident that K+
takes part in diverse biological processes throughout plant life. A number of molecular and
functional studies have demonstrated the existence of a very organized system for K+ uptake and transport in model plants.
However, very scanty information is available related to the potassium transport system in Solanum tuberosum. Current
study involves genome wide identification, in silico characterization and expression analysis of K+
transport related genes in
S. tuberosum. In this study, we identified 43 genes encoding transporters and channels involved in potassium transport.
These genes were categorized on the basis of their conserved motifs and domain structure. There are twenty three potassium
transorters (1 HKT, 4 KEAs and 18 KUP/HAK/KTs) and twenty channels (5 KCOs/TPKs and 15 Shakers). Chromosomal
positioning of these genes showed that these genes are randomly spread over all the 12 chromosomes of S. tuberosum. The
phylogenetic analysis showed that K+
transporters and channels in S. tuberosum are orthologous to genes that are in charge of
K+
transport in Arabidopsis thaliana and Solanum lycopersicum. To validate the in silico data, we performed expression
analysis of these genes under salinity stress. Some genes were differentially expressed in response to salt stress, which
indicates the significance of these genes for stress response of S. tuberosum. Current study is the first insight into the
potassium transport system in S. tuberosum and it will work as a baseline for functional analysis of these genes.
Farrukh Azeem, Mudassar Hussain, Sabir Hussain, Muhammad Zubair, Habibullah Nadeem, Muhammad Amjad Ali, Muhammad Afzal, Muhammad Hussnain Siddique. (2021) GENOME-WIDE ANALYSIS AND EXPRESSION PROFILING OF POTASSIUM TRANSPORT RELATED GENES IN Solanum tuberosum, Pakistan Journal of Agricultural Sciences, Volume 58, Issue 1.
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