Browsing by Author "Selahvarzi, Yahya"
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Item Effect of drought stress and paclobutrazol- treated seeds on physiological response of festuca arundinacea L. master and lolium perenne L. barrage(Uludağ Üniversitesi, 2011) Shahrokhi, Mahsa; Tehranifar, Ali; Hadizadeh, Haniye; Selahvarzi, YahyaTo study interaction between drought stress and pachlobutrazol as treated seeds before planting, seeds of Festuca arundinacea L. Master and Lolium perenne L. Barrage were soaked with 0, 20, 30 and 40 mg.L-1 paclobutrazol for 24 h on shaker during imbibitions stage of seed germination. Treated seeds were sowed in the pots. After 102 days, when the seedlings well established, drought stress was applied in 50% field capacity (FC), 25% FC and well-watered. Interaction effect of Paclobutrazol × drought stress × cultivar was significant on relative water content (RWC). Drought stress increased electrolyte leakage whereas the highest concentration of paclobutrazol reduced EL. The highest total chlorophyll content was observed in Master at wellwatered however at 25% FC in Barrage the lowest chlorophyll content is resulted. Paclobutrazol 40 mgL-1 was the highest total chlorophyll content. Festuca arundinacea L. Master at 25% FC Was the highest proline content. All paclobutrazol concentrations in Festuca arundinacea L. Master resulted higher proline content. Paclobutrazol 20 mgL-1 at 25% FC had higher shoot dry weight. The highest root dry weight resulted in Barrage at well-watered with 30 mgL-1 paclobutrazol. Root length was the highest in well-watered and lower in 25% FC.Item Turfgrass seedling height and quality in paclobutrazol- treated seeds of lolium perenne l. barrage and festuca arundinacea l. master(Uludağ Üniversitesi, 2010) Shahrokhi, Mahsa; Tehranifar, Ali; Hadizadeh, Haniye; Selahvarzi, YahyaPaclobutrazol affects height and quality of seedlings of turfgrass specious. To determine the effect of paclobutrazol on seedling height and visual quality, seeds of Lolium perenne L. Barrage and Festuca arundinacea L. Master were soaked with 0, 20, 30 and 40 mgL-1 paclobutrazol for 24 h on shaker during imbibitions stage of seed germination. Treated seeds were sowed in the soil mixtures containing 70 percent gardening soil (with clay loam texture) and 30 percent sand (V/V). Pots had 41 cm height and 23 cm wide. Lower height at three stages of measured vegetative growth was resulted in Festuca arundinacea L. Master. Paclobutrazol resulted in lower height in three stage of vegetative growth. The interaction between cultivar and paclobutrazol concentrations was significant at 30 days after planting (DAP). Treatment of Festuca arundinacea L. Master with paclobutrazol 30 and 40 mgL-1 showed lower height at stage tree (30 DAP) while there were no significant difference in Lolium perenne L. Barrage. All of paclobutrazol treatment resulted lower wide of blade in Lolium perenne L. Barrage. Festuca arundinacea L. Master treated with 40 mgL-1 paclobutrazol had higher visual quality. It can be concluded that different cultivar could show different response to paclobutrazol treated on seed before planting. Festuca arundinacea L. Master treated with 40 mgL-1 may be more suitable to be used in this regard.