Abstract
The effect of salinity on the ultrastructure of the chloroplast in the leaf and meristematic cells in the root tips was investigated in three barley genotypes, California Mariout, a salt-tolerant genotype, and two salt-sensitive genotypes, Teo and ICARDA 17. Salinity induced clear changes in the ultrastructure of the chloroplast. The most notable change was disorientated lamellar system with the grana and intergrana lamellae becoming swollen. The chloroplasts of California Mariout were less affected by salinity than those of ICARDA 17. Meristematic cells in the root tips exhibited various degrees of disruption in internal structure : vesiculated plasmalemma, accumulation of lipid droplets, vacuolation of cytoplasm and swelling to a complete damage of mitochondria were observed in the salinity treated plants.
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