Comparison of proline accumulation in callus and seedlings of two cultivars of Oryza sativa L. differing in salt tolerance

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Comparison of proline accumulation in callus and seedlings of two cultivars of Oryza sativa L. differing in salt tolerance

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Title: Comparison of proline accumulation in callus and seedlings of two cultivars of Oryza sativa L. differing in salt tolerance
Author: Padma Nambisan
Abstract: Response of callus culture and seedlings of a salt tolerant rice variety, pokkali, was compared to that of a salt sensitive variety, hrswa, under conditions of salinity stress induced by incorporating different quantities of sea water in the culture media. Seedlings of pokkali showed minimal symptoms of salt stress under conditions of low salinity and more severe symptoms including dry of older leaves under high salinity Conditions. However, seedlings of hrswa showed severe stress symptoms even under low salinity and plant death under high salinity conditions. This superior character of salt tolerance of pokkali over hrswa was, however, not observed in callus cultures. In both the cultivars, the severity of symptoms depended on the intensity of stress. Accumulation of free proline in callus cultures and seedlings under stress conditions was monitored. Both pokkali and hrswa accumulated proline in response to stress to the same level. The response was same in callus cultures and in seedlings of both cultivars and the rate of proline accumulation was dependent on the intensity of stress. This, study, thus, indicates that accumulation of proline is not indicative of salt tolerance character in rice.
URI: http://dyuthi.cusat.ac.in/purl/745
Date: 1994-10-10


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