کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5515687 1542024 2017 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An ERF transcription factor from Tamarix hispida, ThCRF1, can adjust osmotic potential and reactive oxygen species scavenging capability to improve salt tolerance
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
An ERF transcription factor from Tamarix hispida, ThCRF1, can adjust osmotic potential and reactive oxygen species scavenging capability to improve salt tolerance
چکیده انگلیسی


- The T. hispida transient overexpression and RNAi-silenced of ThCRF1 were generated to characteried the function of ThCRF1.
- ThCRF1 improves tolerance to salt-shock-induced stress by increased trehalose and proline level and enhanced activities of SOD and POD.
- ThCRF1 binds to GCC-box, DRE and TTG to regulate the gene expression to improve tolerance to salt-shock-induced stress.

Ethylene-Responsive Factors (ERFs) are plant-specific transcription factors (TFs) involved in multiple biological processes, especially in abiotic stress tolerance. However, the ERFs from woody halophytes that are involved in salt stress have been little studied. In the present investigation, we characterized a subfamily member of ERF TFs from Tamarix hispida, ThCRF1, which responds to salt stress. ThCRF1 is a nuclear protein that binds to the motifs including TTG, DRE and GCC-box. Transient transformation was performed to generate T. hispida overexpressing ThCRF1 and RNA interference (RNAi)-silenced ThCRF1 to analyze its function using gain- and loss-of-function methods. Overexpression of ThCRF1 in T. hispida significantly improved tolerance to salt-shock-induced stress; by contrast, RNAi-silence of ThCRF1 significantly decreased tolerance to salt-shock-induced stress. Further experiments showed that ThCRF1 induces the expression of genes including those encoding pyrroline-5-carboxylate synthetase (P5CS), trehalose-6-phosphate synthase (TPS), trehalose-6-phosphate phosphatase (TPP), superoxide dismutase (SOD) and peroxidase (POD), which lead to enhanced proline and trehalose levels and increased SOD and POD activities. These results were further confirmed by studying transgenic Arabidopsis plants overexpressing ThCRF1. Therefore, the results suggested that ThCRF1 improves tolerance to salt-shock-induced stress by enhancing trehalose and proline biosynthesis to adjust the osmotic potential, and by improving SOD and POD activities to increase reactive oxygen species scavenging capability.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Science - Volume 265, December 2017, Pages 154-166
نویسندگان
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