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Asian Journal of Crop Science
  Year: 2012 | Volume: 4 | Issue: 4 | Page No.: 165-170
DOI: 10.3923/ajcs.2012.165.170
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Exogenous Sorbitol and Trehalose Mitigated Salt Stress Damage in Salt-sensitive but not Salt-tolerant Rice Seedlings

P. Theerakulpisut and W. Gunnula

Salinity is one of the major factors limiting plant growth by imposing the osmotic, ion toxicity and oxidative stresses. The accumulation of osmoprotectants is a mechanism in which plants employ to protect tissue damages caused by salinity stress. The present study aimed to investigate the effect of two osmoprotectants (Sorbitol: Sor and Trehalose: Tre) on growth and physiology of rice (Oryza sativa L.) cvs. Khao Dawk Mali (KDML105; salt-sensitive) and Pokkali (PK: salt-tolerant) under NaCl stress. Under salt stress, KDML105 showed a significantly reduced growth and a large increase in the amount of hydrogen peroxide (H2O2), lipid peroxidation as indicated by Malondialdehyde (MDA) content and membrane Electrolyte Leakage (EL). The effects of salt were less severe in PK. Exogenously supplied Sor and Tre were able to enhance growth of salt-stressed KDML105 and alleviated the negative effects of salt by reducing H2O2 and MDA content. However, Sor and Tre did not have any beneficial effect on growth of PK plants. In some cases Sor worsened the salt-induced effects on lipid peroxidation and membrane damage. It can be concluded that exogenous Sor and Tre showed protective roles for salt-sensitive KDML105 but not salt-tolerant PK and the effects were more pronounced for Tre than Sor.
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  •    Effect of Salinity Stress on Growth, Mineral Composition, Proline Content, Antioxidant Enzymes of Soybean
  •    Influence of Salinity on Lipid Peroxidation, Antioxidant Enzymes and Electrophoretic Patterns of Protein and Isoenzymes in Leaves of Some Onion Cultivars
  •    Insight into the Role of Antioxidant Enzymes for Salt Tolerance in Plants
  •    Development of Salt Stress-tolerant Plants by Gene Manipulation of Antioxidant Enzymes
How to cite this article:

P. Theerakulpisut and W. Gunnula, 2012. Exogenous Sorbitol and Trehalose Mitigated Salt Stress Damage in Salt-sensitive but not Salt-tolerant Rice Seedlings. Asian Journal of Crop Science, 4: 165-170.

DOI: 10.3923/ajcs.2012.165.170






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