The Assessment of Appling Drought Stress on Different canola Cultivars
The Assessment of Appling Drought Stress on Different canola (Brassica napus L.) Cultivars
Hamideh Khalaj1, S.A. Sadat Noori1, A.H. Shirani Rad2, GH. Abass. Akbari1, E. Allah Dadi1,
M. R. Labbafi1
1department of agronomy; Abouraihan Campus, University of Tehran, Iran
2assistant professor of Seed and Plant Improvement Institute, Karaj, Iran
In order to study hardness of drought stress applying in different growth time on germination and seedling growth of different canola seed cultivars, an experiment was laid out on factorial arrangement in completely randomized design with 4 replications. In this study different growth time were normal irrigation (as control), irrigation until flowering, irrigation until padding and irrigation until seed filling stages and canola cultivars namely SLM046, Licord, Opera, Zarfam, Orient, Okapi. After 7 days the whole plant and root length, root/shoot ratio, seedlings dry weight, MDG, FGP and DGS. The results showed that the cultivars had significant effect on root/shoot length (p<0.05), seedling dry weight and FGP (p<0.01). Less irrigation also had significant effect on whole plant, root length, root/shoot ratio, seedling dry weight, abnormal seedling (p<0.01) and hard seed (p<0.05). The interaction of cultivar×different less irrigation stages showed that shoot/root ratio in all stage of applying drought stress, except flowering stage (p<0.05).
Key words: Rapeseed, less irrigation stress, Seedling; Root/shoot ratio.