Abstract:In order to investigate the effect of priming on canola seed performance under drought stress a studywas carried out at the Seed Research Laboratory of Razi University, Kermanshah, Iran. The experiment was afactorial with three factors arranged in a completely randomized design with three replications. The first factorwas seed priming (control (untreated), KNO and distilled water), the second was 3 drought stress levels (0.0, -0.3,-0.6, -0.9, -1.2 and -1.5 MPa) and the third was canola cultivars (Okapi and Talayeh). Results indicated that forboth cultivars germination percentage (GP), mean germination rate (MGR), radicle length (RL), plumule length(PL) and seedling dry weight (SDW) were reduced when drought stress level were increased from 0 to -1.5 MPa.Although, the cultivars showed different responses to the increased drought stress level. For all of the traitsunder study, the best results due to the priming treatments were obtained at the drought stress levels higherthan -0.6 or -0.9 MPa. So that, at the -1.5 MPa of drought stress level, GP, MGR, RL, PL and SDW were improved128.62, 200, 223.08, 350 and 69.94%, respectively by KNO3 and 21.44, 71.43, 219.23, 100 and 41.18%, respectivelyby distilled water when compared with control. However, seeds primed with KNO3 showed better performancethan those primed with distilled water. In general, this study revealed that seed priming especially with KNO3improved canola seed performance under drought stress condition. However, the improvements were moreobvious at the higher levels of drought stress.
Abstract:In order to investigate the effect of priming on canola seed performance under drought stress a studywas carried out at the Seed Research Laboratory of Razi University, Kermanshah, Iran. The experiment was afactorial with three factors arranged in a completely randomized design with three replications. The first factorwas seed priming (control (untreated), KNO and distilled water), the second was 3 drought stress levels (0.0, -0.3,-0.6, -0.9, -1.2 and -1.5 MPa) and the third was canola cultivars (Okapi and Talayeh). Results indicated that forboth cultivars germination percentage (GP), mean germination rate (MGR), radicle length (RL), plumule length(PL) and seedling dry weight (SDW) were reduced when drought stress level were increased from 0 to -1.5 MPa.Although, the cultivars showed different responses to the increased drought stress level. For all of the traitsunder study, the best results due to the priming treatments were obtained at the drought stress levels higherthan -0.6 or -0.9 MPa. So that, at the -1.5 MPa of drought stress level, GP, MGR, RL, PL and SDW were improved128.62, 200, 223.08, 350 and 69.94%, respectively by KNO3 and 21.44, 71.43, 219.23, 100 and 41.18%, respectivelyby distilled water when compared with control. However, seeds primed with KNO3 showed better performancethan those primed with distilled water. In general, this study revealed that seed priming especially with KNO3improved canola seed performance under drought stress condition. However, the improvements were moreobvious at the higher levels of drought stress.