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The effect of different seed coating treatments on the seed germination of canola under drought and salinity stresses: using modeling approach

Document Type : Research Paper

Authors

1 M.Sc. Student of Agronomy, Department of Agronomy and Plant Breeding Sciences, Aboureyhan Campus, University of Tehran, Pakdasht, Iran.

2 Assistant Professor, Department of Agronomy and Plant Breeding Sciences, Aboureihan Campus, University of Tehran, Pakdasht, Iran.

3 Professor, Department of Agronomy and Plant Breeding Sciences, Aboureihan Campus, University of Tehran, Pakdasht, Iran.

4 Assistant Professor, Department of Entomology and Plant Diseases, Aboureihan Campus, University of Tehran, Pakdasht, Iran.

Abstract

This research was conducted to investigate the effects of different seed coating treatments on the seed germination of canola under drought and salinity stresses. In order to, two factorial experiments were conducted based on completely randomized design with four replications in laboratory. In both experiments, one of the factors were 10 different seed coating treatments. The second factor was different in two experiments: in the first experiment, the levels of drought stress of 0, -0.8, -1, and -1.2 MPa were considered, and in the second experiment, the levels of salinity stress of 0, 7, 14 and 21 ds/m NaCl were investigated. Results indicated that the lowest hydrotime constant (θH) were observed in T9 (22.627 MPa h), T3 (22.538 MPa h), and T6 (22.263 MPa h). The lowest base water potential (Ψb (50)) were belonged to T4 (-1.332 MPa) and T1 (-1.324 MPa). The maximum of germination percentage under salinity stress (Gmax) was observed in T2 (86.75%). The highest threshold to salinity tolerance (Xo) was belonged to T3 (16.38 ds/m). The highest germination rate was belonged to T3 in all levels of salinity. Totally, seed coating treatments of T3, T6 and T9 were the best treatments under drought stress and T3 was the best treatment under salinity stress.

Keywords

References
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Journal of Crops Improvement
Volume 20, Issue 3
November 2018
Pages 577-593
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