The effect of salinity stress on proline content, photosystem II and germination in crop plants
Journal Title: International Journal of Farming and Allied Sciences - Year 2014, Vol 3, Issue 9
Abstract
Salinity is one of the major obstacles to increasing crop productivity. Some of the most severe problems in soil salinity occur in arid and semiarid regions of the world. Besides these regions, salinity also affects agriculture in coastal regions and areas affected by low-quality irrigation water. The germination phase is the most important and sensitive phases in salinity tension. Salinity by reducing of water potential and special poisonous ions such as: Na+, Cl- and reducing of its necessary nutrition calcium and potassium has negative influence on seed germination. Plants have many behaviors against with salinity indicating. Osmoregulation in plants is one of the effective and meaningful mechanisms against with salinity stress. Proline and hydroxyproline in structural proteins are clearly distinguished from free proline, which serves to regulate osmotic adjustment. Proline transporter was highly expressed in the apical region of barley roots under salt stress. Plant, or algal, responses to salinity depend on PSII response to this stress and on the increased accumulation of zeaxanthin which is believed to be involved in the energy dissipation mechanism that protects the photosynthetic apparatus.
Authors and Affiliations
Mehdi Namrudi, Mahnaz Sarani, Mohammad Mahdi Raoofi, Seyed Majid Hashemi
Keywords
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