Effect of salicylic acid and post anthesis water deficit stress on some agronomic and physiological traits of different wheat genotypes

Document Type : Research Paper

Authors

1 Former M. Sc. Student, Dept. of Agronomy and Plant Breeding, Arak Branch, Islamic Azad University, Arak, Iran

2 Assoc. Prof., Dept. of Agronomy and Plant Breeding, Arak Branch, Islamic Azad University, Arak, Iran

3 Scientific Board Member, Agriculture and Natural Resources Research and Education Center of Markazi Province, Arak, Iran

Abstract

Water deficit stress decreased the quality and quantity of crops. To investigate the effect of salicylic acid and drought stress at reproductive stages on agronomic and physiologicaltraits of different wheat genotypes, an experiment was carried out as split plot based on randomized complete block design with three replications in Agriculture and Natural Resources Research Center of Markazi province, Arak, Iran, in 2012-2013. The experimental factors were included irrigation with three levels (Non-drought stress as control, drought stress after anthesis along with foliar application of salicylic acid (SA) and drought stress after anthesis without salicylic acid) as main factor and seven wheat genotypes (Oroum, Zare, Mihan, Pishgam, Alvand, Roshan-back cross and C-78-14 line) as sub-factor. The results showed that drought stress decrease grain yield of the genotypes compared to normal condition. The maximum grain yield under three conditions, normal (9602.7 kg/ha), drought stress (4632.7 kg/ha) and drought stress along with foliar application of SA (4935.7 kg/ha) was belong to Oroum genotype. This genotype had low ion leakage under both normal and drought stress condition. Foliar application of SA increased the grain yield of Alvand, Roshan-back cross, Zare, Mihan, Pishgam, C-78-14 line and Oroum by 75.6, 49.2, 28.6, 20.21, 19.7, 12.05 and 6.5 percentage, respectively, under drought stress. In total, the results of this research showed that the highest response of agro-physiological traits to salicylic acid was belong to Alvand and Roshan-back cross under drought stress.

Keywords


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