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Effected of various osmotic stress in Rice callus and prolin accumulation. | ||
| journal of kerbala university | ||
| Article 1, Volume 4, Issue 4, 2008, Pages 317-328 PDF (0 K) | ||
| Authors | ||
| Hussein Sami Nagi; Ali Yasser Hafith | ||
| Abstract | ||
| Calls obtained from two rice cultivars (Anber 33 and IPA1) were Exposed to different osmotic stress intensities followed by a period of stress relief. Relative growth rate , callus water content and changes in organic and inorganic solutes were determined at the end of stress. After the stress period callus derived from both cultivars showed a decrease in relative growth rate, but at lesser exent in Anber 33 than IPA1 cultivar. Same tendency was recorded in the callus water content under mannitol induced osmotic stress.The in Organic solute seemed to have no contribution in the osmotic adjustment in mannitol-stressed calli since k+ and Ca2+ concentrations decreased drastically while Na+ and Mg2+ concentrations were not affected. The accumulation of proline occurred in both cultivars and was more marked in IPA1 than Anber 33 cultivar. At the end of the relief period, we observed that all the considered Parameters have recovered completely to reach the control levels. According to these results, we conclude that the drought stress-induced changes are reversible, at the least at the cellular level, in Oryza Sativa L. cultivars. | ||
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