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Response of yield, yield components and seed quality of safflower cultivars to water deficit tension and seed priming
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Abstract: (2738 Views) |
In order to investigate the response of yield, yield components and seed quality of safflower cultivars to water deficit tension and seed priming with salicylic acid, an experiment was conducted as split plot factorial arrangement based on a randomized complete blocks design with three replications for two years (2015-16) at Shahroud Agricultural Research Center. The main plot consisted of three levels of irrigation based on the evaporation rate of a class A evaporation pan including: no water deficit tension (60 millimeter evaporation), mild water deficit tension (120 millimeter evaporation) and severe water deficit tension (180 millimeter evaporation) as well as subplot a combination of two factors: safflower cultivars (Goldasht, Sina and Soffeh) and seed priming (seeds treated with salicylic acid and non-treated seeds). The results of combined analysis showed that water deficit tension reduced significantly the investigated traits of safflower cultivars compared to non-water deficit tension, so that the severe water deficit tension caused reduction of plant height (15 percent), grain yield (29 percent), number of heads per plant (21 percent), number of seeds per heads (22 percent), head weight (17 percent), kernel percentage (5 percent), oil seed percentage (4 percent), oil yield (36 percent) and total chlorophyll (32percent) and increasing the percentage of seed protein (4 percent)and carotenoid content (17 percent) in comparison to non-tension conditions. The results of combined analysis showed the improvement of the investigated traits in primed treatment compared to control seeds, in both water deficit tension and non-tension conditions. The interaction of year with irrigation and cultivar had a significant effect on grain yield and oil yield, so that the highest grain yield from Goldasht cultivar and the highest oil yield from Soffeh cultivar were obtained under non-tension conditions. |
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| Keywords: Drought, Protein percentage, Kernel percentage, Carotenoid and Oil yield. |
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Full-Text [PDF 616 kb]
(2236 Downloads)
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Type of Study: Applicable |
Subject:
Crop Physiology
Received: 2018/08/29 | Accepted: 2018/08/29 | Published: 2018/08/29
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