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Do Phytohormones Influence the Grain Quality and Yield of Winter Wheat under Drought Conditions?

Mojde Sedaghat 1, Zeinolabedin Tahmasebi Sarvestani 1, Yahya Emam 2, and Ali Mokhtassi Bidgoli 1
1. Department of Agronomy, Faculty of Agriculture, Tarbiat Modares University, PO Box 14115-336, Tehran, Iran
2. Department of Agronomy and Plant Breeding, College of Agriculture, Shiraz University, PO Box 71441-65186, Shiraz, Iran
Abstract—Two winter wheat (Triticum aestivum L.) cultivars (Sirvan & Pishtaz) were grown in greenhouse in College of Agriculture, Shiraz, Iran, under two water regimes (80%FC & 40% FC) after anthesis to evaluate the influence of two phytohormones (Salycilic acid and Strigolactone) on grain yield and quality. On grain samples, the following quality analyses were performed: grain hardness, protein and gluten content, gluten index and SDS test. Furthermore, Grain yield and thousand grain weight were measured as well. Results showed that protein content, grain hardness, wet gluten, gluten index and SDS were enhanced in drought condition. However, this rate dampened when pots sprayed with salycilic acid or strigolactone. A significant reduction in thousand grain weight and yield were observed in drought of both cultivars. This reduction was lower in cv. Sirvan. Exogenous application of salycilic acid and strigolactone diminish diverse effects of drought in plants. Restricted water during grain filling stage leads to lower yield but higher grain quality. Application of strigolactone and salycilic acid changed these results next to well watered situation.
 
Index Terms—wheat, strigolactone, salycilic acid, drought

Cite: Mojde Sedaghat, Zeinolabedin Tahmasebi Sarvestani, Yahya Emam, and Ali Mokhtassi Bidgoli, "Do Phytohormones Influence the Grain Quality and Yield of Winter Wheat under Drought Conditions?," Journal of Advanced Agricultural Technologies, Vol. 4, No. 2, pp. 151-158, June 2017. Doi: 10.18178/joaat.4.2.151-158
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