Early growth response of six wheat varieties under artificial osmotic stress condition
2011
Khakwani, A.A. (University of Reading (UK). School of Biological Sciences) | Dennett, M.D. (University of Reading (UK). School of Biological Sciences) | Munir, M. (University of Reading (UK). School of Biological Sciences)
An experiment was carried out under laboratory conditions where seeds of six wheat varieties (Damani, Hashim-8, Gomal-8, DN-73, Zam-04 and Dera-98) were raised in Petri dishes and were either treated with distilled water (control) or 15% polyethylene glycol (PEG) 6000 solution. Seeds were treated with 15% PEG solution to establish an artificial osmotic stress condition (water stress) and observe its effect on germination percentage, coleoptile length, shoot and root length, fresh weight of shoot and root. A significant difference (P less than 0.05) was recorded between varietal and treatment means regarding all traits. Variety Hashim-8 gave maximum germination percentage (93.33%) whereas maximum coleoptile (1.78cm) and shoot length (5.77cm) was observed in variety DN-73 which was statistically at par with variety Hashim-8. Similarly, root length (3.63g), fresh shoot (0.15g) and root weight (0.12g) was maximum in variety Dera-98 which was statistically at par with variety Hashim-8. A second experiment was carried out under glasshouse environment where plants were treated with non-stress (100% field capacity) and water stress (35% field capacity) treatments. Although total grain yield was significantly (P less than 0.05) reduced in all six wheat varieties when grown in water stress condition however Hashim-8 showed the lowest reduction (13%) while Zam-04 showed the highest (32%). The outcome of both experiments indicated that these varieties have great potential to incorporate with the existing commercial wheat varieties in order to obtain high yield in water stress regions.
Показать больше [+] Меньше [-]Ключевые слова АГРОВОК
Библиографическая информация
Эту запись предоставил National Agricultural Research Centre