Padaria, J C and Yadav, R and Tarafdar, A and Lone, S A and Kumar, K and Sivalingam, P N (2016) Molecular cloning and characterization of drought stress responsive abscisic acid-stress-ripening (Asr 1) gene from wild jujube, Ziziphus nummularia (Burm.f.) Wight & Arn. Molecular Biology Reports, 43 (8). pp. 849-859. ISSN 0301-4851
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Abstract
Drought is a calamitous abiotic stress hampering agricultural productivity all over the world and its severity is likely to increase further. Abscisic acid-stress-ripening proteins (ASR), are a group of small hydrophilic proteins which are induced by abscisic acid, stress and ripening in many plants. In the present study, ZnAsr1 gene was fully characterized for the first time from Ziziphus nummularia, which is one of the most low water forbearing plant. Full length ZnAsr1 gene was characterised and in silico analysis of ZnASR1 protein was done for predicting its phylogeny and physiochemical properties. To validate transcriptional pattern of ZnAsr1 in response to drought stress, expression profiling in polyethylene glycol (PEG) induced Z. nummularia seedlings was studied by RT-qPCR analysis and heterologous expression of the recombinant ZnAsr1 in Escherichia coli. The nucleotide sequence analysis revealed that the complete open reading frame of ZnAsr1 is 819 bp long encoding a protein of 273 amino acid residues, consisting of a histidine rich N terminus with an abscisic acid/water deficit stress domain and a nuclear targeting signal at the C terminus. In expression studies, ZnAsr1 gene was found to be highly upregulated under drought stress and recombinant clones of E. coli cells expressing ZnASR1 protein showed better survival in PEG containing media. ZnAsr1 was proven to enhance drought stress tolerance in the recombinant E.coli cells expressing ZnASR1. The cloned ZnAsr1 after proper validation in a plant system, can be used to develop drought tolerant transgenic crops.
| Item Type: | Article |
|---|---|
| Divisions: | UNSPECIFIED |
| CRP: | UNSPECIFIED |
| Uncontrolled Keywords: | Ziziphus nummularia, RT-qPCR, ZnAsr1 gene, Phylogenetic analysis, SDS-PAGE |
| Subjects: | Others > Abiotic Stress Others > Drought Tolerance Others |
| Depositing User: | Mr Ramesh K |
| Date Deposited: | 09 Jan 2017 08:08 |
| Last Modified: | 03 Jul 2018 08:57 |
| URI: | http://oar.icrisat.org/id/eprint/9853 |
| Official URL: | http://dx.doi.org/10.1007/s11033-016-4013-z |
| Projects: | UNSPECIFIED |
| Funders: | UNSPECIFIED |
| Acknowledgement: | Authors express sincere thanks to the Project Director, National Research Centre on Plant Biotechnology (NRCPB) for providing facilities to carry out this work. Authors are grateful to Director, Indian Agricultural Research Institute (IARI), New Delhi for providing National Phytotron Facility where the plant stress experiments were performed. National Agricultural Innovation Project (NAIP) of the Indian Council of Agricultural Research (ICAR) is duly acknowledged for providing the financial support. |
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