مطالعه اثر تیمارهای اسید آبسیزیک و اسید جاسمونیک بر صفات مورفو فیزیولوژیک ارقام گلرنگ تحت تیمارهای کم آبیاری
محورهای موضوعی : تنش
1 - عضو هیئت علمی دانشگاه
کلید واژه: درصد روغن, دوام سطح برگ, سرعت رشد محصول, شاخص سطح برگ, عملکرد روغن,
چکیده مقاله :
به منظور بررسی تیمارهای کم آبیاری و محلول پاشی با اسيد جاسمونیک و اسید آبسیزیک بر برخی صفات مورفوفیزیولوژیک رقم گلرنگ آزمایشی به صورت اسپلیت پلات فاکتوریل در قالب طرح پایه بلوکهای کاملا تصادفی با سه تکرار در مزرعه تحقیقاتی دانشکده کشاورزی دانشگاه شاهرود طی دو سال 1401-1400انجام شد. در این آزمایش سه سطح آبیاری (۱۰۰، ۷۰ و ۵۰ درصد نیاز آبیاری گلرنگ) به عنوان فاکتور اصلی و سه رقم گلرنگ (گلدشت، فرامان و سینا) و محلول پاشی با سه سطح شامل (غلظت صفر، محلول پاشی با اسید جاسمونیک با غلظت 5/0 میلی مولار و محلول پاشی با اسید آبسیزیک با غلظت ۲۰ میلی مولار) به عنوان فاکتور فرعی انتخاب شدند. نتایج نشان داد که بیشترین محتوای نسبی آب برگ، کلروفیل، شاخص سطح برگ، عملکرد دانه، درصد روغن و عملکرد روغن مربوط به رقم سینا و تیمار آبیاری ۱۰۰ درصد نیاز آبیاری گلرنگ و کمترین میزان این صفات مربوط به رقم گلدشت و تیمار آبیاری ۵۰ درصد نیاز آبی گلرنگ بود. برهمکنش رقم × محلول پاشی و تنش كم آبیاری در محلول پاشی تنها بر عملکرد روغن و کلروفیل a معنی دار شد. محلول پاشی با اسيد جاسمونیک و اسید آبسیزیک نیز موجب افزایش کلیه صفات در مقایسه با تیمار بدون محلول پاشی شد. نتایج نشان داد که تفاوت‌های موجود در بین رقم‌ها و همچنین تأثیر این محلول پاشی‌ها جهت افزایش میزان صفات مورد بررسي مي تواند در انتخاب رقم و ترکیبات مناسب جهت کاهش اثرات نامطلوب تنش بی به منظور دستیابی به افزایش تولید از آنها استفاده کرد.
In order to evaluate the effect of deficit irrigation treatment and foliar application of ascorbic and jasmonic acids on morphophysiological traits of safflower genotypes (Carthamus tinctorius L.), an experiment was set out in a split plot factorial in a randomized complete block design with three replications at Shahrod University Agricultural Research Station during the two years, i.e. 2020-2021. The main factor consisted of three levels of irrigation of 100%, 75% and 50% of the plant's water requirement of safflower and sub-factor including safflower genotypes including Sinai, Isfahan local, Faraman and foliar application with three levels including (0 concentration, foliar application of jasmonic acid with 0.5 mM concentration and foliar application of Abscisic acid with 20 mM concentration(. The results showed that the highest cholliorophyll a, cholliorophyll b, relative water content, leaf area index, crop growth rate, oil percentage, grain yield and oil yield related to Sina genotype and 100% of the plant's water requirement and the least of these traits were related to the Isfahan local genotype and 50% of the plant's water requirement. Also, the results of this study showed that the interaction effects of genotype× deficit irrigtion and genotype× foliar application were significant only on cholliorophyll a and oil yield. Also, foliar application of Jasmic and ascorbic acids increased all traits compared to the non foliar application treatment. The results of this study showed that the differences between the genotypes and also effect of foliar application of jasmonic and ascorbic acids to increase of these traits were important components that could be used to select genotypes and suitable compounds to reduce undesirable effects of water stress in order to achieve increased economic performance.
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