پديد آورنده :
سيدان جاسبي، مهدي
عنوان :
بررسي صفات فيزيولوژيكي مرتبط با تحمل به تنش كمبود آب در ژنوتيپ هاي كنجد
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي
صفحه شمار :
ده، 65ص.: مصور، جدول، نمودار
يادداشت :
ص.ع. به فارسي و انگليسي
استاد راهنما :
پرويز احسان زاده
استاد مشاور :
مرتضي زاهدي، محمدرضا مصدقي
توصيفگر ها :
مرحله رشد رويشي , ريشه , خصوصيات فتوسنتزي
تاريخ نمايه سازي :
15/8/91
استاد داور :
مريم حقيقي، حسن كريم منجي
تاريخ ورود اطلاعات :
1396/09/20
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Evaluation of Some Physiological Characteristics Related to Water Deficit Stress Tolerance in 12 Genotypes of Sesame Sesamum indicum L Mehdi Seyedan Jasbi mehdiseyyedan@yahoo com May 29 2012 Department of Agronomy and Plant Breeding College of Agriculture Isfahan University of Technology Isfahan Iran 84156 83111 Degree MSc Language FarsiSupervisor Parviz Ehsanzadeh ehsanp@cc iut ac ir AbstractScarcity of water resources is a major component of low productivity of crop plants in arid and semi aridclimatic conditions Among all biotic and abiotic stress factors drought accounts for nearly 45 of thedecreases in crop yield Therefore a 3 replicate randomized complete block factorial pot experiment wasconducted in 2011 at College of Agriculture Isfahan University of Technology Isfahan Iran Theexperiment was aimed at studying the effects of water deficit stress on gas exchange properties chlorophyll concentration Chl chlorophyll fluorescence leaf proline and soluble carbohydrates content and some morphological characteristics of roots of sesame genotypes Four levels of irrigation includedirrigation when soil water potential of pots was approximately 0 2 MPa control W1 0 5 MPa lowwater deficit W2 1 0 MPa intermediate water deficit W3 and 1 4 MPa severe water deficit W4and 12 sesame genotypes included Oltan Non branching Naz Branching Naz Darab Yekta Varamin Ardestan Isfarayen Ferdous II Sabzevar I Kashmar and Khaf Carbon exchange rate A and stomatalconductivity gs were decreased by 43 84 and 39 65 respectively under W4 compared to W1 Leafproline and soluble carbohydrates content were increased with water deficit they were increased by129 8 and 35 6 respectively under W4 compared to W1 Chl a Chl b and total leaf Chl content Chl tot were decreased by 72 83 49 14 and 72 12 respectively due to severe water deficit relative tothe control Maximum quantum efficiency of PSII Fv Fm was decreased by 17 72 under W4 comparedto W1 Plant height and shoot dry weight indicated 21 53 and 52 18 decreases respectively with W4relative to W1 Sesame root characteristics were negatively affected by water deficit total root length root volume root surface area and root dry weight indicated 72 83 49 14 72 12 and 39 decreases respectively when grown under severe water deficit compared to control Meanwhile root shoot ratio increased by 30 59 under severe water deficit in comparison to under controlconditions No significant effects for interaction of genotypes by irrigation was detected though Isfarayen proved more appropriate for water deficit conditions at least to some extent due apparently toits ability to synthesize more proline and soluble carbohydrates compounds and produce a more extensiveroot system compared to the rest of sesame genotypes used in this study It could be concluded that plantphotosynthetic components and rooting behavior of sesame and therefore its dry matter production arenegatively affected by water deficit at least at the vegetative growth stages Key words water deficit sesame vegetative growth stage root photosynthesis characteristics
استاد راهنما :
پرويز احسان زاده
استاد مشاور :
مرتضي زاهدي، محمدرضا مصدقي
استاد داور :
مريم حقيقي، حسن كريم منجي
