Abstract:
Drought is an important
factor that could restrict plants growth and
productivity through several biological and
physiological processes. Salicylic acid (SA)
has a key role in many physiological
processes of plants and stimulate specific
responses against various stresses biotic and
abiotic, in some of plants. In order to
evaluate the effect of foliar application by
salicylic acid (SA) under drought stress on
some morphological characteristics sesame,
a split-plot experiment with a completely
random design with three replications was
performed. There were three levels of
irrigation: control (normal irrigations),
water stress at flowering stage and water
stress at seed production stage, as main plot
and sub plot consisting of four levels of the
foliar application of salicylic acid: 0
(control), 1, 1.5 and 2.25 mM. Results
indicated that the effects of water stress on
traits, such as plant height, height of first
capsule from soil surface, number of
branches, number of capsules per plant
showed significant difference at a level of
1%, while on the number of seeds per
capsule, seed weight, leaf area index,
biological yield, grain yield sesame, without
significant difference indicated. Foliar
application with salicylic acid was not so
significant (P< 0.05) at different
concentrations on measured traits, as well as
interactive effects between drought stress
and different amounts of salicylic acid,
without significant difference observed.
