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Effect of phytohormones on
growth and ion accumulation of wheat under salinity stress
A.R. Gurmani*1,
A. Bano2, J. Din1, S.U Khan1
and I. Hussain2
1Plant
Physiology Program, Crop Sciences Institute, National
Agricultural Research Centre, Islamabad, Pakistan.
2Department
of Plant Sciences, Faculty of Biological Sciences,
Quaid-e-Azam, University, Islamabad, Pakistan.
*Corresponding author. E-mail:
gurmani_narc@yahoo.com. Tel.: +92-51-9255394.
Accepted
3 March, 2009 |
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A hydroponics experiment was conducted to assess the role of
abscisic acid (ABA), benzyladenine (BA) and cycocel (CCC) on
growth and ion accumulation of three spring wheat cultivars,
cv. Wafaq-2001, cv. Inqulab-91, and cv. SAARC-1 under
salinity stress. Seeds of all the cultivars were treated
prior to sowing with ABA and BA each at 10-5 M
and CCC at 10-6 M for 24 h. Three weeks old
plants of both the cultivars were exposed to 0, 75 and 150
mM NaCl. Thirty day old plants were harvested
after sixteen days of salt treatment. Dry weight of shoot
and root were decreased with salt treatment. But ABA, BA and
CCC treatments caused a significant ameliorative effect on
all the cultivars. Concentrations of Na+ and Cl-
in shoot of all the three cultivars were increased with the
increasing level of NaCl. ABA, BA and CCC pre-treatment
increased K+ and Ca2+ but reduced Na+
and Cl- concentrations in shoot of all the
cultivars. However, the magnitude of reduction was higher in
ABA pre-treated plants.
Key
words:
Wheat, salinity, abscisic acid, benzyladenine, cycocel. |
