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پاسخهای فیزیولوژیکی ارقام کنجد به کاربرد نانو منیزیوم و پلیمر زیستی کیتوزان تحت شرایط رژیمهای مختلف آبیاری | ||
| به زراعی کشاورزی | ||
| مقاله 5، دوره 22، شماره 3، مهر 1399، صفحه 385-406 اصل مقاله (1.46 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/jci.2020.287335.2259 | ||
| نویسندگان | ||
| جابر خردادی1؛ فرزاد فنودی* 2؛ جعفر مسعود سینکی2؛ شهرام رضوان2؛ علی دماوندی2 | ||
| 1دانشجوی دکتری، گروه زراعت، دانشگاه آزاد اسلامی، واحد دامغان، دامغان، ایران. | ||
| 2استادیار، گروه کشاورزی، دانشگاه آزاد اسلامی واحد دامغان، دامغان، ایران. | ||
| چکیده | ||
| بهمنظور بررسی پاسخهای فیزیولوژیکی دو رقم کنجد به کاربرد نانوکود منیزیم و کیتوزان تحت شرایط رژیمهای آبیاری، آزمایشی به‌صورت اسپیلاتپلات فاکتوریل بر مبنای بلوکهای کامل تصادفی با سه تکرار در سال 97-1396 انجام شد. قطع آبیاری بهعنوان فاکتور اصلی (آبیاری نرمال، آبیاری تا 50 درصد گلدهی و دانهبندی)، فاکتورهای فرعی شامل ارقام کنجد اولتان و دشتستان-2، نانو منیزیم (محلولپاشی و عدم محلولپاشی) و کیتوزان (صفر، 8/4 و 4/6 گرم بر لیتر) بودند. بیش‌ترین عملکرد دانه در کاربرد 4/6 گرم در لیتر کیتوزان تحت شرایط آبیاری نرمال با میانگین 1/1235 کیلوگرم در هکتار بود. بیش‌ترین محتوی کلروفیل کل در ژنوتیپ دشتستان-2 تحت شرایط آبیاری نرمال با میانگین 7/24 میلیگرم بر گرم وزن تر بهدست آمد و کم‌ترین میانگین در هر دو ژنوتیپ در آبیاری تا BBCH65 بهترتیب با میانگین 21/17 و 46/17 میلیگرم بر گرم وزن تر مشاهده شد. کاربرد نانوکود در ژنوتیپ اولتان تحت شرایط آبیاری تا BBCH65 منجر به افزایش 11/41 درصدی فعالیت آنزیم کاتالاز در مقایسه با تیمار شاهد گردید. بیش‌ترین فعالیت آسکوربات پراکسیداز در تیمار عدم کاربرد کیتوزان تحت شرایط آبیاری تا BBCH65 بود که افزایش 06/55 درصدی در مقایسه با تیمار شاهد داشت. به‌طورکلی، نتایج نشان داد که آبیاری تا BBCH65 منجر به کاهش عملکرد دانه شد که با محلولپاشی نانوکود منیزیم و کیتوزان اثرات منفی ناشی از تنش تعدیل (بهترتیب 93/9 و 46/27 درصد) شد. براساس نتایج تجزیه رگرسیونی چهار صفت، کلروفیل b، کلروفیل کل، پرولین و کاتالاز وارد مدل شدند که در مجموع 11/42 درصد از تغییرات عملکرد دانه را توجیه نمودند. نتایج همبستگی ساده بین صفات و تجزیه رگرسیونی حاکی از اثرات غیرمستقیم صفات فیزیولوژیکی بر عملکرد دانه بودند و از بین پارامترهای مورد بررسی رنگیزههای فتوسنتزی از اهمیت بالایی در شرایط تنش برخوردار بودند. | ||
| کلیدواژه‌ها | ||
| پرولین؛ تجزیه رگرسیونی؛ دانه روغنی؛ رنگیزههای فتوسنتزی؛ عملکرد دانه؛ فعالیت آنتی‌اکسیدانی | ||
| عنوان مقاله [English] | ||
| Physiological Responses of Sesame Cultivars to the Application of Nano Magnesium and Chitosan Biopolymer under Different Irrigation Regimes | ||
| نویسندگان [English] | ||
| jaber khordadi Varamin1؛ Farzad Fanoodi2؛ jafar masoud sinaki2؛ Shahram rezvan2؛ Ali Damavandi2 | ||
| 1Ph.D. Candidate, Agronomy Department, Damghan branch, Islamic Azad University, Damghan, Iran. | ||
| 2Assistant Professor, Agriculture Department, Damghan branch, Islamic Azad University, Damghan, Iran. | ||
| چکیده [English] | ||
| To investigate the physiological responses of sesame cultivars to the application of nano magnesium and chitosan biopolymer under different irrigation regimes, a split factorial based on randomized complete block design has been conducted with three replicates between 2017 and 2018. The irrigation cut-off, based on BBCH scale, has served as the main factor (normal irrigation, irrigation up to 50% flowering, and seed ripening), with the sub factors including Oltan and Dashtestan-2 sesame cultivars, and nano magnesium (application and non-application) and chitosan (control, 4.8, and 6.4 g.L-1). The highest mean grain yield belongs to the application of 6.4 g.L-1 chitosan under normal irrigation with an average of 1235.1 kg.ha-1. Also, the highest total chlorophyll content is observed in Dashtestan-2 genotype under normal irrigation with a mean of 24.7 mg.g-1 FW and the lowest mean have been obtained in both genotypes under irrigation up to 65 BBCH with a mean of 17.21 and 17.46 mg.g-1 FW, respectively. Application of nano fertilizer in Oltan genotype under irrigation up to 65 BBCH increases the catalase activity by 41.11%, compared to the control treatment. The highest activity of ascorbate peroxidase has been achieved when not applying chitosan under irrigation conditions up to 65 BBCH. It has risen by 55.06%, compared to the control treatment. In general, the results show that irrigation up to 65 BBCH reduces grain yield, in turn alleviated by the negative effects of stress on magnesium and chitosan nanoparticles (9.93% and 27.46%, respectively). Based on the regression analysis results, four traits, namely chlorophyll b, total chlorophyll, proline, and catalase, enter the model that explains 42.11% of the total grain yield variations. Results of simple correlation between traits and regression analysis indicate the indirect effects of physiological traits on grain yield and among the studied parameters, photosynthetic pigments has been of high account in stress conditions. | ||
| کلیدواژه‌ها [English] | ||
| Antioxidant activity, grain yield, oilseed, photosynthetic pigments, proline, regression analysis | ||
| مراجع | ||
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