Effect of drought stress on seed quality of summer oilseed rape produced on drought stressed mother plants

Subject Areas : Journal of plant ecophysiology

H.R. Badrooj ¹ (M.Sc. student of Agronomy, Islamic Azad University Takestan Branch, Takestan, Iran)
K. Khaksar ² (M.Sc .Expert of Seed and Plant Certification and Registration Institute(SPCRI), Karaj, Iran)
A. Hamidi ³ (Research assistant Proffessor of Seed and Plant Certification and Registration Institute(SPCRI), Karaj, Iran)
A.H. Shirani Rad ⁴ (Associated Professor of Seed and Plant Improvement Institute(SPII), Karaj, Iran)

Received: 2023-12-08 Accepted : 2023-12-08 Published : 2023-03-01

Keywords: Drought stress, Oilseed rape, Seedling vigour,

Abstract :

In order to study of drought stress and normal irrigation effect on summer oilseed rape cultivars seed germination, the experiment was conducted as a Factorial in Randomize Complete design with 4 replications, in central laboratory of Seed and Plant Certification Research Institute (SPCRI) Karaj. Experimental treatments were the seed produced in normal irri[1]gation (S1) and drought stress in floral stage (S2) with cutting irrigation of floral time until the maturity stage and ten cul[1]tivars of summer oilseed rape as RGS003, Sarigol, Option500, RGS006, 19-H, ORS 3150-3006, ORS 3150-3008, RG 4403, RG 405/03 and RGAS 0324. Some seed and seedling germination traits such as 1000-seed mass, Final Germination Percentage (FGP), Mean Time of Germination (MTG), Coefficient of Germination Velocity (CGV), Mean Daily Germi[1]nation (MDG), Daily Germination Speed (DGS), seedling length, root, shoot and seedling fresh and dry weight and traits of Longitudinal Vigour Index and Weight vigour Index were studied after accelerated ageing test on seeds. The results showed that significant differences were observed regarding FGP, MTG, CGV, MDG, DGS, traits of longitudinal vigour index and root dry weight by drought stress and cultivar. The means comparison results of drought stress and cultivar inte[1]raction on 1000-seed mass showed that the cultivars of RG 4403 with 3.498g had the most and RGS006 with 3.082g had the lowest 1000-seed mass respectively. Where Sarigol cultivar produced with normal irrigation 983.4 and RGS003 277.1 had the most LVI1 and LVI2. As a point of view of MTG, CGV, MDG and DGS respectively the seeds of Sarigol pro[1]duced under the drought stress, RGS003 produced in normal irrigation and Sarigol produced under the drought stress. In general, it can be concluded that drought stress on investigated reduced the seed quality of the cultivars.