The anatomical studies showed that the lower and
upper epidermis, and the diameter of vascular bundles of
leaves of some varieties decreased under salinity stress.
Anatomical structure of the roots of the studied varieties of barley changed. In some varieties, the thickening of
exodermis as adaptive response was observed. Other
varieties observed thinning of exodermis and endodermis.
Reduction in the diameter of the vascular bundles
was observed in all studied varieties. Under the effect of
NaCl, the diameter of the central cylinder of the roots of
barley plants reduced. A correlation between the mean of
the diameter of central cylinder and tolerance to NaCl
salinity stress by barley varieties was found.