5685

5307

كارشناسي ارشد

زراعت

اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي

1389

دوازده،72ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

پرويز احسان زاده

قدرت اله سعيدي،خورشيد رزمجو

17/12/89

علي اكبر رامين، محمد حسين اهتمام

مهندسي كشاورزي

ID5307

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Evaluation of interrelations of some antioxidants and physiological characteristics and grain yield of sesame genotypes under water deficit stress Javad Noori Poor Sisakht Javad98jn@yahoo com May 29 2010 College of Agriculture Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiSupervisor s P Ehsanzadeh E mail address ehsanp@cc iut ac irAbstractWater deficit stress is the most important environmental constraint for growth yield and productivity of crops including the oil seed crops in Iran This study was aimed at studying the influence of differing irrigation r gimes ongrowth cholorophyll proline and some antioxidants along with grain yield yield components and oil content ofsesame genotypes using a 4 replicate split plot randomized complete block design at Shervedan Research Farm Isfahan University of Technology Iran in 2009 Irrigation levels based on evaporation from a standard class A panserved as main plots and included I1 as control 75 mm I2 as moderate stress 110mm and I3 as severe stress 145mm Four sesame genotypes served as sub plots and included Oltan Naz Takshakheh Varamin and Yekta Leaf chlorophyll proline and catalase CAT and ascorbate peroxidase APX antioxidant content leaf area index LAI at pod formation and plant height pod plant seed pod 1000 seed weight grain and biological yield oilpercent oil yield and harvest index were measured The I1 and I3 irrigation levels produced the greatest 2 53 andsmallest LAI respectively I1 level of irrigation out yielded the I3 level in terms of pod plant seed pod and grainyield by 44 91 97 14 54 78 and 28 1481 02 kgha 1 respectively Oltan and Naz Takshakheh produced thegreatest 787 9 kgha 1 and smallest 406 1kgha 1 oil yield respectively I1 and I3 levels of irrigation indicated thegreatest 7397 4 kgha 1 and smallest 5890 4 kgha 1 biological yield respectively I2 level of irrigation led to 35 and 40 increase in CAT and APX but I3 decrease the activity of the latter enzymes by 29 and 11 respectively compared to the I1 level of irrigation It could be concluded that severe water deficit decreases grain yield andgrowth of sesame genotypes and the decrease is mainly due to the photosynthetic surfaces rather than chlorophyllconcentration It seems that CAT and APX play significant antioxidative roles under moderate water deficit butthey cannot play such a role when sesame genotypes are severely stressed Key words irrigation cholorophyll proline antioxidant LAI grain yield sesame

پرويز احسان زاده

قدرت اله سعيدي،خورشيد رزمجو

علي اكبر رامين، محمد حسين اهتمام