Salt tolerance in plants is a complex phenomenon involving
morphological and developmental changes as well as physiological and biochemical processes. Screening of genotypes for salt tolerance in field conditions is not a suitable
procedure as the levels of salinity in the field varies depending on season and soil depth. Plants also interact with
many other environmental factors which interfere with the
expression of salinity tolerance. Therefore, screening of
plants has to be conducted under controlled environmental
conditions to facilitate true expression of the plant’s innate
ability to tolerate the stress caused by salinity.