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Articles by Leila Zeinali Yadegari
Total Records ( 2 ) for Leila Zeinali Yadegari
  Leila Zeinali Yadegari , Reza Heidari and Jirair Carapetian
  Physiological responses to chilling, including antioxidative enzyme activity, Relative Water Content (RWC) and soluble sugar contents were investigated in soybean to identify mechanisms of chilling tolerance. Plants were exposed to 15°C (cold-acclimated) or 25°C (non-acclimated) for 24 h, under 250 μmol m-2 sec-1 Photosynthetically Active Radiations (PAR). Then all plants were exposed to 4°C (chilling temperature) for 24 h and allowed to recover at 25°C for 24 h. We analyzed the activity of ascorbate peroxidase (APX), catalase (CAT) and guaiacol peroxidase (GPX) and soluble sugar content and RWC in both shoots and roots of soybean seedlings. It revealed that the activity of APX and CAT and GPX induced in leaves and roots. Increased activity in roots is important for cold tolerance as compared to shoots. The amount of RWC decreased in both roots and shoots, but soluble sugar content increased, especially in shoots as compared to control plants. Chilling sensitive soybean plants can be made tolerant to cold by cold-acclimation.
  Leila Zeinali Yadegari , Reza Heidari and Jirair Carapetian
  In this study plant`s response to cold acclimation and nonacclimation was investigated in soybean (Glycine max). Seedlings were exposed to 15°C (cold-acclimated) or 25°C (nonacclimated) for 24 h, under 250 μmol m-2 sec-1 Photosyntetically Active Radiation (PAR). Then, all plants were exposed to chilling temperature at 4°C for 24 h and allowed to recover at 25°C for 24 h. Physiological responses to chilling, including, MDA, proline, chlorophyll a and b and carotenoids and total protein contents were measured in soybean to identify mechanisms of chilling tolerance. Relative water content showed that cold-acclimated plants were less affected by chilling compared to nonacclimated plants. Cold-acclimated plants also recovered faster from chilling injury than nonacclimated plants.
 
 
 
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