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A comparative gene analysis with rice identified orthologous group II HKT genes and their association with Na+ concentration in bread wheat

Overview of attention for article published in BMC Plant Biology, January 2016
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Title
A comparative gene analysis with rice identified orthologous group II HKT genes and their association with Na+ concentration in bread wheat
Published in
BMC Plant Biology, January 2016
DOI 10.1186/s12870-016-0714-7
Pubmed ID
Authors

H. A. Chandima K. Ariyarathna, Klaus H. Oldach, Michael G. Francki

Abstract

Although the HKT transporter genes ascertain some of the key determinants of crop salt tolerance mechanisms, the diversity and functional role of group II HKT genes are not clearly understood in bread wheat. The advanced knowledge on rice HKT and whole genome sequence was, therefore, used in comparative gene analysis to identify orthologous wheat group II HKT genes and their role in trait variation under different saline environments. The four group II HKTs in rice identified two orthologous gene families from bread wheat, including the known TaHKT2;1 gene family and a new distinctly different gene family designated as TaHKT2;2. A single copy of TaHKT2;2 was found on each homeologous chromosome arm 7AL, 7BL and 7DL and each gene was expressed in leaf blade, sheath and root tissues under non-stressed and at 200 mM salt stressed conditions. The proteins encoded by genes of the TaHKT2;2 family revealed more than 93 % amino acid sequence identity but ≤52 % amino acid identity compared to the proteins encoded by TaHKT2;1 family. Specifically, variations in known critical domains predicted functional differences between the two protein families. Similar to orthologous rice genes on chromosome 6L, TaHKT2;1 and TaHKT2;2 genes were located approximately 3 kb apart on wheat chromosomes 7AL, 7BL and 7DL, forming a static syntenic block in the two species. The chromosomal region on 7AL containing TaHKT2;1 7AL-1 co-located with QTL for shoot Na(+) concentration and yield in some saline environments. The differences in copy number, genes sequences and encoded proteins between TaHKT2;2 homeologous genes and other group II HKT gene families within and across species likely reflect functional diversity for ion selectivity and transport in plants. Evidence indicated that neither TaHKT2;2 nor TaHKT2;1 were associated with primary root Na(+) uptake but TaHKT2;1 may be associated with trait variation for Na(+) exclusion and yield in some but not all saline environments.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 28 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Chile 1 4%
Australia 1 4%
Unknown 26 93%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 7 25%
Researcher 5 18%
Student > Postgraduate 3 11%
Student > Master 2 7%
Student > Bachelor 1 4%
Other 5 18%
Unknown 5 18%
Readers by discipline Count As %
Agricultural and Biological Sciences 13 46%
Biochemistry, Genetics and Molecular Biology 6 21%
Unspecified 1 4%
Philosophy 1 4%
Psychology 1 4%
Other 0 0%
Unknown 6 21%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 08 September 2016.
All research outputs
#20,302,535
of 22,840,638 outputs
Outputs from BMC Plant Biology
#2,517
of 3,252 outputs
Outputs of similar age
#331,477
of 394,468 outputs
Outputs of similar age from BMC Plant Biology
#55
of 64 outputs
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