Journal
PLANT CELL REPORTS
Volume 35, Issue 1, Pages 27-41Publisher
SPRINGER
DOI: 10.1007/s00299-015-1864-z
Keywords
Abiotic stress; OsPGK2; Phosphoglycerate kinase; Rice; Salinity; Tobacco
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Funding
- UGC Resource Networking
- Capacity building funds from JNU, Department of Science and Technology, Department of Biotechnology, Ministry of Science and Technology, Government of India
- UGC
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Phosphoglycerate kinase (PGK; EC = 2.7.2.3) plays a major role for ATP production during glycolysis and 1, 3-bisphosphoglycerate production to participate in the Calvin cycle for carbon fixation in plants. Whole genome analysis of rice reveals the presence of four PGK genes (OsPgks) on different chromosomes. Comparative expression analysis of OsPgks in rice revealed highest level of transcripts for OsPgk2 at most of its developmental stages. Detailed characterization of OsPgk2 transcript and protein showed that it is strongly induced by salinity stress in two contrasting genotypes of rice, i.e., cv IR64 (salt sensitive) and landrace Pokkali (salt tolerant). Ectopic expression of OsPgk2a-P (isolated from Pokkali) in transgenic tobacco improved its salinity stress tolerance by higher chlorophyll retention and enhanced proline accumulation, besides maintaining better ion homeostasis. Ectopically expressing OsPgk2a-P transgenic tobacco plants showed tall phenotype with more number of pods than wild-type plants. Therefore, OsPgk2a-P appears to be a potential candidate for increasing salinity stress tolerance and enhanced yield in crop plants.
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