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Salinity induced changes in cell membrane stability, protein and RNA contents.

AFRICAN JOURNAL OF BIOTECHNOLOGY (Impact Factor: 0.57). 01/2012;
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Available from: Shafiq Rehman, Feb 16, 2014
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    • "Sahiwal - 2002 confirmed its higher salt - tolerance potential over cv . Agatti - 2002 . In our study , RMP exhibited a negative correlation with shoot fresh weight ( r ¼ 2 0 . 6466 * * * ) . A negative correlation between RMP and growth attributes has been reported in sugar beet ( Jamil et al . 2012a ) . Water deficiency in plants due to the osmotic effect of salt stress leads to malfunctioning of the membranes by increasing ion leakage . The inhibitory effects of salinity on membranes are largely due to the elevated levels of toxic salts in the growth medium ( Parida & Das 2005 ) ."
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    • "Sahiwal - 2002 confirmed its higher salt - tolerance potential over cv . Agatti - 2002 . In our study , RMP exhibited a negative correlation with shoot fresh weight ( r ¼ 2 0 . 6466 * * * ) . A negative correlation between RMP and growth attributes has been reported in sugar beet ( Jamil et al . 2012a ) . Water deficiency in plants due to the osmotic effect of salt stress leads to malfunctioning of the membranes by increasing ion leakage . The inhibitory effects of salinity on membranes are largely due to the elevated levels of toxic salts in the growth medium ( Parida & Das 2005 ) ."
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    ABSTRACT: The inherent differences for salt tolerance in two maize cultivars (Agatti-2002 and Sahiwal-2002) were evaluated in pot experiments. Plants were grown in half-strength of Hoagland nutrient solution added with 0, 80, 100, 120, 140 and 160mM of NaCl. Salt stress markedly reduced the shoot and root lengths and fresh and dry masses. Reduction in growth attributes was more pronounced in cv. Agatti-2002 than cv. Sahiwal-2002. Both maize cultivars exhibited significant perturbations in important biochemical attributes being employed for screening the crops for salt tolerance. Cultivar Sahiwal-2002 was found salt tolerant as compared to cv. Agatti-2002 because it exhibited lower levels of H2O2, malondialdehyde (MDA) and higher activities of antioxidant enzymes. In addition, cultivar Sahiwal-2002 exhibited less salt-induced degradation of photosynthetic pigments, lower levels of toxic Na and Cl2 and higher endogenous levels of K and K/Na ratio. The results indicate that salt stress induced a marked increase in MDA, H2O2, relative membrane permeability, total soluble proteins and activities of antioxidant enzymes (superoxide dismutase, peroxidase, catalase andascorbate peroxidase). Moreover, increase in endogenous levels of Na and Cl2 and decrease in K and K/Na ratio and photosynthetic pigments were recorded in plants grown under salinity regimes.
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    • "Sahiwal - 2002 confirmed its higher salt - tolerance potential over cv . Agatti - 2002 . In our study , RMP exhibited a negative correlation with shoot fresh weight ( r ¼ 2 0 . 6466 * * * ) . A negative correlation between RMP and growth attributes has been reported in sugar beet ( Jamil et al . 2012a ) . Water deficiency in plants due to the osmotic effect of salt stress leads to malfunctioning of the membranes by increasing ion leakage . The inhibitory effects of salinity on membranes are largely due to the elevated levels of toxic salts in the growth medium ( Parida & Das 2005 ) ."
    [Show abstract] [Hide abstract]
    ABSTRACT: The inherent differences for salt tolerance in two maize cultivars (Agatti -2002 and Sahiwal- 2002) were evaluated in pot experiments. Plants were grown in half strength of Hoagland nutrient solution added with 0, 80, 100, 120, 140 and 160 mM of NaCl. Salt stress markedly reduced the shoot and root lengths and fresh and dry masses. Reduction in growth attributes was more pronounced in cv. Agatti-2002 than cv. Sahiwal-2002. Both maize cultivars exhibited significant perturbations in important biochemical attributes being employed for screening the crops for salt tolerance. Cultivar Sahiwal-2002 was found salt tolerant as compared to cv.Agatti- 2002 because it exhibited lower levels of H2O2, MDA and higher activities of antioxidant enzymes. In addition, cultivar Sahiwal-2002 exhibited less salt-induced degradation of photosynthetic pigments, lower levels of toxic Na+ and Cl-, higher endogenous levels of K+ and K+/Na+ ratio. The results indicate that salt stress induced a marked increase in MDA, H2O2, relative membrane permeability (RMP), total soluble proteins (TSP), and activities of antioxidant enzymes (SOD, POD, CAT and APX). Moreover, increase in endogenous levels of Na+ and Cl-, and decrease in K+, K+/Na+ ratio and photosynthetic pigments were recorded in plants grown under salinity regimes.
    Plant Biosystems 04/2013; 148(5). DOI:10.1080/11263504.2013.798369 · 1.91 Impact Factor
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