Kamyar Kazemi; Mohammad Khajehosseini; Ahmad Nezami; Hamdollah Eskandari
Abstract
Effect of seed priming on germination and seedling growth of sesame investigated under controlled conditions. The primed seeds with ZnSO4 had the maximum germination percentage whereas the highest germination rate was observed in hydro-primed seeds. The treated seeds with PEG showed the best growth of ...
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Effect of seed priming on germination and seedling growth of sesame investigated under controlled conditions. The primed seeds with ZnSO4 had the maximum germination percentage whereas the highest germination rate was observed in hydro-primed seeds. The treated seeds with PEG showed the best growth of the seedlings and rootlet. The complementary field experiment was conducted to evaluate the effect of seed priming and irrigation intervals on the growth and the yield of sesame. A split plot experiment was carried out based on the RCBD with four replications in a field in Northwest of Shadegan during 2013-14 growing season. Main plots were irrigation intervals (irrigation after 150 and 250 mm evaporation from class-A evaporation pan) and sub plots were eight seed priming levels (as the laboratory test). The maximum plant height was observed in plants from the treated seeds with CaCl2 (5 percent) and irrigated after 150 mm evaporation from pan and the minimum plant height was observed from the no-primed seeds and irrigated after 250 mm evaporation from the pan. The highest and the lowest of 1000-seed weight achieved in plants from the treated seeds with hydro-priming and irrigated after 150 mm evaporation from the pan, and in plants from the non-primed seeds and irrigated after 250 mm evaporation from the pan, respectively. The maximum amounts of biological yield, seed yield, water use efficiency, oil yield, oil percentage and the minimum protein content were achieved in plants from the treated seeds with hydro-priming. Irrigation after 250 mm evaporation from the pan decreased the yield and yield components.
Zahra Mehrabi zadeh; Parviz Ehsan Zade
Volume 13, Issue 2 , March 2012, , Pages 75-88
Abstract
Sesame could be an appropriate oilseed crop for water limited environments. This research was aimed at studying growth, leaf chlorophyll fluorescence, proline content, yield and yield components of sesame cultivars under different moisture regimes. A 4-replicate split plot RCBD field experiment was conducted ...
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Sesame could be an appropriate oilseed crop for water limited environments. This research was aimed at studying growth, leaf chlorophyll fluorescence, proline content, yield and yield components of sesame cultivars under different moisture regimes. A 4-replicate split plot RCBD field experiment was conducted at the Lavark Research Farm, College of Agriculture, Isfahan University of Technology, Isfahan, Iran in 2007. Three levels of irrigation consisting I1 = control (no water deficit), I2 = moderate water deficit and I3 = severe water deficit, representing irrigation after 75, 110 and 145 mm evaporation from the standard Class A Pan, respectively, served as main plots. Four sesame genotypes consisting ‘Non Branching Naz’, ‘Yekta’, ‘Varamin’ and ‘Oltan’ were considered as sub plots. Irrigation regimes and cultivars differed in terms of Fm at grain filling stage, though they did not differ in terms of leaf chlorophyll content and Fv/Fm. The latter trait decreased non-significantly from 0.81 at the I1 to 0.77 at the I3 level of irrigation. Leaf proline content increased from 3.5 at I1 to 8.6 mgg-1 at the I3 level of irrigation. Severe water deficit decreased LAI, pod/plant, seed/pod, grain yield and dry matter by 55, 42, 37, 48 and 49 percent, respectively. Severe water deficit led to a significant decrease in grain yield from 1212 to 625 kg/ha. It seems that water deficit affects sesame growth and grain yield significantly and this negative effect is mainly through a reduction in the photosynthetic surfaces, rather than a decrease in the maximum of quantum efficiency for photosystem II of the present genotypes. Yekta and Varamin sesame were more productive compared to the rest of cultivars.