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Supplemental Calcium Enhances Growth and Elicits Proline Accumulation in NaCl-Stressed Rice Roots

Safdar Hussain Shah , Satoshi Tobita and Zahoor Ahmad Swati

The present study was conducted to investigate the interactive effects of NaCl and CaCl2 on the growth, ion relations and proline accumulation in seedlings of rice (Oryza sativa. L.). Twenty-days-old seedlings were subjected to 0, 100 and 150 mol m‾3 NaCl concentrations with or without supplemental calcium chloride (5.0 and 0.15 mol m‾3). Salinity induced a reduction in growth both of Bankat and Hitomebore and Ca2+ decreased the effect. The proline level of root tissues was less under the higher salinity stress (150 mol m‾3) than at lower salinity (100 mol m‾3). Additional Ca2+ reduced the Na+ concentration of shoot and root tissues of both cultivars at high salinity in particular. It was concluded that the supplemental calcium decreased the detrimental effects of NaCl not only by reducing Na+ uptake and its translocation to shoots but also by the enhancement of proline accumulation in root tissues.

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  How to cite this article:

Safdar Hussain Shah , Satoshi Tobita and Zahoor Ahmad Swati , 2003. Supplemental Calcium Enhances Growth and Elicits Proline Accumulation in NaCl-Stressed Rice Roots. Journal of Biological Sciences, 3: 903-914.

DOI: 10.3923/jbs.2003.903.914


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