Indian Society of Genetics & Plant Breeding

Gene expression dynamics of HKT family genes in salt-tolerant and salt-sensitive indica rice cultivars

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Soil salinity is one of the major constraints limiting
productivity of crop plants. In present study, effect of NaCl
(150mM) on high-affinity potassium transporters (HKTs)
were investigated into four contrasting rice genotypes salttolerant
(CSR11, CSR27) and salt-sensitive (MI48 and
VSR156). Salinity stress significantly reduced growth of
VSR156 and MI48 whereas, only slight reduction was
observed in CSR11 and CSR27. Under NaCl stress, OsHKTs
group I transcripts were significantly up-regulated in saltsensitive
varieties in comparison with salt-tolerant.
However, OsHKTs group II showed higher expression in
salt-tolerant one in comparison with sat-sensitive. These
results suggested the differential expression of OsHKT
group I and II genes and hence, their differential behavior
in response to salt stress. Our study, elucidate the role of
seven OsHKT genes in shoot and root for salt tolerance in
rice plant.

Keywords: Sodium, rice, HKT transporters, salinity tolerance


Year: 2017
Volume: 77
Issue: 3
Article DOI: 10.5958/0975-6906.2017.00049.9
Print ISSN: 0019-5200
Online ISSN: 0975-6906


Vagish Mishra info_circle
Nagendra Kumar Singh info_circle
Vandna Rai info_circle

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