Accumulation of Spd
and Spm has been reported in cucumber salt tolerant cultivars in
comparison to the salt sensitive cultivars [4]. During the last few
years, genetic, transcriptomic and metabolomic approaches have
unraveled key functions of different PAs in the regulation of abiotic
stress tolerance. Nevertheless, the precise molecular mechanisms
by which PAs control plant responses to stress stimuli are largely
unknown [5].
Cucumber is one of the most important vegetables worldwide. It
is highly sensitive to salinity, especially in its germination and early
growth phases [6]. Enhancement of salt stress tolerance in cucumber
through exogenous application of PAs has been described
[4,7]. However, a limited number of studies have looked at the
precise mechanism on PAs regulating plant responses to salt stress.
Proteomics is a powerful tool for describing how the proteome is
affected by different physiological conditions, so we investigated
the differentially expressed proteins in cucumber leaves in either
salt stress or normal condition with and without Spd. The aim of
this study is to better understand the underlying mechanism of the
salt resistance by Spd in cucumber seedlings.