Madras Agricultural Journal
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Research Article | Open Access | Peer Review

In vitro Studies on Drought Tolerance in Rice through Polyethylene Glycol (PEG) Induced Osmotic stress

Volume : 102
Issue: Apr-jun
Pages: 144 - 150
Published: April 30, 2023
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Abstract


Selection by tissue culture through an osmoticum agent polyethylene glycol is precise for drought assessment compared to actual field condition. Mature seeds of fourteen parental lines (four lines and ten testers) and forty hybrids were used for developing callus on Murashige and Skoog (MS) medium supplemented with two treatments viz., MS + 2, 4 –D 2 mg/l and MS + 2, 4-D 2 mg/l + CH 1 mg/l. One hundred mg of embryogenic callus was exposed to basal medium supplemented with different concentrations viz., 0, 0.5, 1, 1.5 and 2 per cent of polyethylene glycol (PEG) - 6000 as chemical drought inducer. Callus induction duration, effect of PEG on callus mass, proline content and plantlet regeneration were studied. Callus volume decreased and total proline content was found to be increased significantly with increased in PEG concentration. In five parents and twelve hybrids, plantlets regeneration was observed up to the highest concentration of PEG. On over all comparison, three parents namely, BR 2655, MAS 26, Vandana and three hybrids namely, TNAU CMS 2A x MAS 26, IR 58025 A x BR 2655, and IR 68897 A x MAS 26 exhibited positive response for all the four characters acting as drought governing indices.

DOI
Pages
144 - 150
Creative Commons
Copyright
© The Author(s), 2025. Published by Madras Agricultural Students' Union in Madras Agricultural Journal (MAJ). This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited by the user.

Keywords


Rice PEG Drought tolerance Callus growth Proline content Plant regeneration
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