AtHKT1 gene regulating K⁺ state in whole plant improves salt tolerance in transgenic tobacco plants.

ABSTRACT: The status of K⁺ is important for plant health. However, little is known about if high-affinity potassium transporter HKTs may help K⁺ retention under salt stress. Here, we determined the effect of Arabidopsis thaliana transporter gene (AtHKT1) on the K⁺ status, Na⁺-induced toxicity, and salt tolerance in tobacco (Nicotiana tabacum L.). Six AtHKT1 transformed tobacco lines (T1, T2, … T6) were contrasted with a non-transgenic plantlet at the whole-plant and molecule levels. AtHKT1 gene was expressed in the xylems of stem, root and leaf vein in the transgenic tobacco, with the line T3 having highest expression. At Day 15, in the 200 mmol L^-1 NaCl stress treatment, the transgenic plants remained a healthy K⁺ status, while the c

SUBMITTER: Wang L 

PROVIDER: S-EPMC6224463 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature