Akademik Veri Yönetim Sistemi
6th International Eurasian Conference on Biological and Chemical Sciences (EurasianBioChem 2023, Ankara, Türkiye, 11 - 13 Ekim 2023, ss.94
This study presents the results of a split-plot experiment conducted at Miandoab Agriculture Research Station,
West Azarbaijan, during the 2015-2016 years. The study aimed to assess the effects of antitranspirants on
several physiological traits of wheat, including photosynthesis, total chlorophyll content (chlorophyll a and
chlorophyll b), grain protein percentage, grain yield, transpiration rate, and photosynthetic water use
efficiency, under water deficit stress conditions. The experiment utilized a randomized complete block design
with three replications. The main plots were subjected to different irrigation treatments, involving complete
irrigation, irrigation withholding at heading stages, and irrigation withholding at flowering stages. Within each
main plot, subplots were allocated for foliar applications of distinct antitranspirants, namely Prometrin, Kaolin,
Tmatrom, Chitosan, and a control group. Additionally, two wheat cultivars, Zarin and Mihan, were evaluated
to study cultivar-specific responses. The findings revealed significant effects of the antitranspirants on various
physiological characteristics of wheat under drought stress. Specifically, the application of prometrin during
irrigation withholding at the flowering stage resulted in increased photosynthesis at 2 μmol CO2 m-2
s
-1
compared to the control. Chitosan treatment at irrigation withholding during the heading stage exhibited the
highest total chlorophyll content (4.69 μg/g FW), while chitosan treatment also demonstrated the highest
chlorophyll content (2.42 μg/g FW). In the Zarin cultivar, chitosan application during irrigation withholding
at the heading stage showed the highest chlorophyll b content. Furthermore, chitosan treatment during
irrigation withholding at the flowering stage significantly increased the protein content (12.27 mg/g DW) and
enhanced the yield by 868 kg/ha in the Mihan cultivar compared to the control. Notably, the lowest
transpiration rate was observed during the irrigation withholding stage (3.83 mM H2O m-2 s-1). Overall, the
results highlighted the importance of considering the timing of stress and the type of cultivar in assessing the
effects of antitranspirants. Chitosan, in particular, showed promising potential for improving the
photosynthetic properties of wheat (Mihan cultivar) and enhancing seed yield under drought stress conditions.
Keywords: Low irrigation, Chitosan, Chlorophyll, Protein, Wheat Cultivars, Grain Yield