Effect of Brassinosteroid on resistance to water stress on safflower varieties

Zafari, Mahnaz (2021) Effect of Brassinosteroid on resistance to water stress on safflower varieties. Doctoral thesis, Faculty of Agriculture and Natural.

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Abstract

Research Aim: The aim of this study was to identify some drought tolerance mechanisms of three safflower genotypes and reducing drought stress damage by brassinosteroids application. Also, the effect of brassinosteroids on seed germination traits was the aim of this study. Research method: To investigate the effects of drought stress on some characteristics of spring safflower, a split plot factorial experiment was conducted based on randomized complete block design with three replications in university of moheghegh Ardabil in 2015. The main factor belonged to irrigation schedules as irrigation after 80, 120 and 160 mm evaporation from class A pan, and subplots, cultivars of safflower [Goldasht, Faraman and Sina] and two levels of 24-epibrassinosteroid (0 and 10-7 M). Greenhouse experiment was conducted in a factorial experiment based on randomized complete block design with three replications, in the greenhouse of the Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili. Experimental factors included drought stress in three levels, 85 % FC (I1), 65 %FC (I2) and 45 %FC (I3), three spring genotypes of safflower [Goldasht, Faraman and Sina], and two levels of 24-epibrassinosteroid (0 and 10-7 M)

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