The Potential Role of Osmotic Pressure to Exogenous Application of Phytohormones on Crop Plants Grown under Different Osmotic Stress ()
ABSTRACT
The osmotic pressure represented as a sign of plant tolerance or
sensitive to salinity stress. In the following plants, the increase in OP seems to be a manner of
defense mechanism to survive. OP increased in shoots of maize, shoot and root
of wheat and cotton plants was concomitant with shoot soluble sugar, root
soluble protein and shoot and root amino acids of maize plants. However, in
wheat the increase in OP was related with increase of root soluble sugar and
protein of shoots and roots. In cotton plants, the elevation of OP was run
parallel with increase soluble sugar of shoots and roots, shoot soluble protein and root amino acids. The increase in
OP was related with a marked and significant reduction in the water
content of these plants. However, the decrease in OP of shoot and root of broad
bean was related with the reduction of shoots and roots soluble sugar, protein
and root amino acids of broad bean. While the OP becomes more or less unchanged
in shoots and tended to decrease in root of parsley plants, this concomitant with
unchanged trend in the shoots amino acids and reduction in root soluble sugar
and root amino acids. Run with previous trend values of OP and metabolites of
parsley plants were related with stable values in shoot water content and
reduction in root water content. With GA3 and
kinetin treatments mostly increase the values OP which parallel with increase and
soluble sugar, soluble protein and amino acids contents of shoots and roots of
maize, wheat, cotton, broad bean and parsley plants with NaCl increasing. This
related with increase water uptake by roots in these plants. The results indicated
that kinetin had a more effective to shoot maize, both organs of wheat, broad
bean and parsley plants in response to salinity stress while GA3 was
more effective on cotton plants especially at higher levels of salinity. Thus
plants strategy differed in their tolerance to salinity stress according to
their species and differed also according to the different organs of the same
plants and kinetin treatment induced highly positively affect than GA3 treatments.
Share and Cite:
El-Samad, H. (2016) The Potential Role of Osmotic Pressure to Exogenous Application of Phytohormones on Crop Plants Grown under Different Osmotic Stress.
American Journal of Plant Sciences,
7, 937-948. doi:
10.4236/ajps.2016.76089.