Effect of Salicylic Acid and Thiourea on Growth, Yield and Certain Physiological Characteristics of Safflower under Drought Stress

Document Type : Research Paper

Authors

1 Master Graduate, Department of Genetic and Crop Production, Faculty of Agriculture, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran

2 Assistant Professor, Department of Genetic and Crop Production, Faculty of Agriculture, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran

Abstract

In order to investigate the effects of salicylic acid and thiourea on yield and morphophysiological characteristics of safflower under drought stress, an experiment was conducted as split plot factorial based on randomized complete block design with three replications. The main factor was three levels (80 (non-stress), 110 and 40mm evaporation from evaporation pan) and sub-factor was three levels of thiourea (zero, 500 and 1000ppm) and two levels of salicylic acid (zero and 1mM). The highest plant length (71.38cm), number of seed per head (32.37), weight of one thousand seeds (22.38g) and oil percentage (22.54%) was obtained under non-stressed condition. Application 1000 ppm thiourea s increased 17.91% number of seed per head, 12% weight of one thousand seeds and 14.03% oil percentage as compared to non-application of thiourea. Also, 1mM salicylic acid showed a 6.05% oil percentage increase as compared to non-application of salicylic acid. The highest of leaf area (2599mm2) and biological yield (8656kg/ha) were observed at 1000ppm thiourea and 1mM salicylic acid under non-stressed condition. In non-stressed and 140mm evaporation condition, there was no significant difference in seed yield among application of thiourea and non-application of thiourea. In 110mm evaporation condition, application of thiourea increased seed yield. In non-stressed and 140mm evaporation condition, 1000ppm thiourea increased chlorophyll a compared to non-application of thiourea. In 140mm evaporation condition, application of thiourea decreased total carbohydrate compared to non-application of thiourea.

Keywords

Main Subjects

Volume 12, Issue 1
June 2020
Pages 153-167

Files

Share

How to cite

Statistics