Open Access
ARTICLE
Physiological response of early and late maturity oilseed rape cultivars to drought under two climate conditions
Jabbari H1, M Gholamhosseini1, M Naeemi2, A Nasiri3
1 Assistant Professor of Seed and Plant Improvement Institute (SPII), Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran.
2 Assistant Professor, Department of Crop production, Faculty of Agriculture and Natural Resources, Gonbad Kavous University , Gonbad Kavous, Golestan, Iran.
3 Department of Agriculture ,Chalus Branch, Islamic Azad University, Chalus, Mazandaran, Iran.
Address correspondence to: Hamid Jabbari, e-mail:
Phyton-International Journal of Experimental Botany 2018, 87(all), 133-142. https://doi.org/10.32604/phyton.2018.87.133
Abstract
Two experiments were performed in 2011-2012 to
investigate the response of three oilseed rape cultivars to drought
stress, grown under two climate conditions in Iran (cold and hot
climates). The experiments were conducted using a randomized
complete-block design arranged in split-plot with three replicates.
The irrigation treatments (FI: full irrigation; WIF: withholding irrigation
at flowering stage, and WIS: withholding irrigation at the
silique formation stage until physiological maturity) were allocated
to main plots, whereas subplots consisted of the oilseed rape cultivars:
early maturating (GKH2005), relatively late maturing (Opera)
and late maturing (Okapi). Drought caused a significant reduction
in seed number, 1000-seed weight, seed and oil yield, harvest index,
relative water content (RWC) and leaf stomatal conductance.
Oilseed rape cultivars responded to irrigation treatments in different
ways. The maximum seed number per silique in the main stem was
observed in Okapi cultivar under WIS, whereas GKH2005 cultivar
produced the minimum seed number per silique in the main stem in
WIF conditions. There were no significant differences among oilseed
rape cultivars in terms of seed yield when grown under full irrigation
condition; however, under drought stress conditions, the maximum
and minimum seed yields were obtained from GKH2005 and Okapi
cultivars, respectively. In general, results suggest that stomatal conductance,
RWC and silique number per secondary branches were the
most important traits contributing to drought tolerance.
Keywords
Cite This Article
H, J., Gholamhosseini, M., Naeemi, M., Nasiri, A. (2018). Physiological response of early and late maturity oilseed rape cultivars to drought under two climate conditions.
Phyton-International Journal of Experimental Botany, 87(all), 133–142. https://doi.org/10.32604/phyton.2018.87.133