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Academic Research Journal of
Agricultural Science and Research |
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Academic Research Journal of Agricultural Science and Research Vol. 3(3), pp. 32-44. March, 2015. ISSN: 2360-7874 DOI: 10.14662/ARJASR2015.001
Full Length Research Differential changes in Phytohormones, oxidative damage and yield of wheat Genotypes under drought stress at post anthesis stage
Parisa Sharifi1*,Reza Armirnia2
1Departmentof Agronomy, Faculty of Agriculture, Urmia University, Education Center of Shahid Bakeri Miyandoab, 2Departmentof Agronomy, Faculty of Agriculture, Urmia University Corresponding Author’s E-mail: sharifi_parisa_phd@yahoo.com
Accepted 12 January 2015
In this study,
we measured the variations of plant hormones under well-watered and
drought stress conditions during post anthesis stage in a field
experiment. Hormonal levels in the flag leaves of Azar-2, Sardari
(tolerant to drought stress), HN7, DH-2049 (moderately tolerant to
drought stress), SARA and TEVEE (susceptible to drought stress)
genotypes were monitored continuously at 7, 17 and 23 days post anthesis.
The contents of Indole-3-acetic acid (IAA) and abscisic acid (ABA) were
higher in tolerant genotypes than in susceptible ones at all the stages.
The IAA content also increased during the first and second drought
stages in wheat flag leaves, but it dropped sharply thereafter under
drought stress. ABA content increased dramatically in flag leaves under
stress as well as with age, and then the highest levels of ABA were
observed at third drought stage. The GA3 content decreased in wheat flag
leaves subjected to drought stress. The effects of water stress on
hydrogen peroxide content, electrolyte leakage, glutathione content and
two antioxidant enzymes (Glutathione reductase and Ascorbate peroxidase)
were also studied. It was observed that drought stress lead to oxidative
damage to plant cells that damaging effects of oxidative stress was
higher in susceptible than in tolerant and moderately tolerant
genotypes. The results suggest that the shortened maturity duration and
higher kernel weight in tolerant genotypes than others under drought
stress is associated to others phytohormone content in the flag leaves
of these genotypes. How to cite this article: Sharifi P, Armirnia R (2015). Differential changes in Phytohormones, oxidative damage and yield of wheat Genotypes under drought stress at post anthesis stage. Acad. Res. J. Agri. Sci. Res. 3(3):32-44.
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