9177

8489

كارشناسي ارشد

علوم باغباني

اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي

1393

دوازده،64ص.: جدول

ص.ع.به فارسي و انگليسي

نعمت اله اعتمادي، علي نيكبخت

محمد پسركلي

14/7/93

مصطفي مبلي، محمدحسين اهتمام

مهندسي كشاورزي

ID8489

عنوان صفحه فھرست مطالب ھشت فھرست جداول يازده فھرست پيوستھا دوازده چكيده 1 مقدمه فصل اول واهداف 2 1 1 مقدمه 2 1 2 اھداف 4

58 Effects of Trinexapac Ethyl on Five Cultivars of Zoysiagrass Zoysia matrella Responses to Drought Stress Yazdan Rezaii Samangani rezaee yazdan@gmail com 2 june 2014 Department of Horticulture Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiN Etemadi Assoc Prof Supervisior netemadi@cc iut ac irA Nikbakht Assist Prof Supervisior anikbakht@cc iut ac ir Abstract Zoysiagrass is a warm season grass that is relatively resistant to cold and drought stresses This grass is grown in temperate regions Available water resources for irrigation of the grass in the recent years has been declining Different management methods for water requirement of the grass have been used The use of plant growth regulators has also been used in the management of this grass in this study This study evaluated the effects of Trinexapac ethyl on the physiological characters of this grass conducted in a factorial experiment in a completely randomized design with three replications Rhizomes of 5 cultivars of Zoysiagrass Zoysia matrella were planted in pots with 20 cm diameter in the greenhouse at Isfahan University of Technology IUT Treatments included withholding irrigation and spraying ethyl without Trinexapac Ethyl drought stress TE two weeks prior to the stress period with the Trinexapac ethyl concentration in spray 1 95 ml L 1 The results showed that shoot soluble sugar content and relative water content increased by Trinexapac Ethyl application Proline content also increased by Trinexapac ethyl treatment However no significant difference was observed under drought stress without Trinexapac ethyl The chlorophyll and carotenoid contents increased by Trinexapac ethyl treatment During the drought stress period ion leakage increased without Trinexapac Ethyl But drought stress TE treatment decreased ion leakage in all the varieties of Zoysia matrella Catalase enzyme activity in drought TE treatment also increased The highest sugar content proline chlorophyll and carotenoid in cultivars 3 and 14 of the Zoysia matrella were obtained by TE applications under drought stress condition These cultivars also had higher catalase activity but the others showed no significant differences Also cultivar 14 had more catalase enzyme activity with significant difference compared with other cultivars Generally Trinexapac ethyl increased soluble sugars chlorophyll content carotenoids enzyme activity reduced plant height and improved the quality of the grasses Finall Trinexapac ethyl had a significant role in reducing drought stress Key words catalase enzyme Trinexapac ethyl Proline Zoysiagrass

نعمت اله اعتمادي، علي نيكبخت

محمد پسركلي

مصطفي مبلي، محمدحسين اهتمام