اثر تابش نور LED و محلول¬پاشی با سلنیوم و یُد بر صفات رشدی و خصوصیات کیفی گیاه ریحان دارچینی (Ocimum basilicum var. cinnamon)
محورهای موضوعی : اکولوژی محیطی
افسانه نورزایی
1
,
مریم رحیمی
2
*
,
داریوش رمضان
3
,
زینب محکمی
4
,
یوسف فرخ زاد
5
1 - دانش آموخته کارشناسی ارشد، گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه زابل، زابل، ایران
2 - استادیار، گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه زابل، زابل، ایران.
3 - Department of Horticultural Sciences, Faculty of Agriculture, University of Zabol, Zabol, Iran
4 - عضو هیأت علمی پژوهشکده کشاورزی دانشگاه زابل
5 - استادیار،گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه شهید چمران اهواز، اهواز، ایران.
کلید واژه: ارزش تغدیه‌ای, ریحان, گلخانه, نور تکمیلی,
چکیده مقاله :
تحقیقات اخیر بیانگر تأثیر نورپردازی LED بر تجمع آنتوسیانین‌ها و فلاونوئیدها در گیاهان بوده است. تأثیر تابش نور LED بههمراه محلولپاشی سلنیوم و یُد بر رشد و ترکیب بیوشیمیایی ریحان دارچینی تا حد زیادی ناشناخته مانده است. برای این منظور، مطالعه‌ای به‌صورت فاکتوریل سه عاملی (نور LED، غلظت‌های 0، 2، 4 و 6 پیپیام سلنیوم و ید) در قالب طرح بلوک کامل تصادفی در سه تکرار (مجموع 96 واحد آزمایش) در گلخانه پژوهشکده کشاورزی پژوهشگاه زابل به اجرا درآمد. نشاءها در مرحله 4 برگی بهگلدانهای اصلی انتقال یافته و محلولهای سلنیوم و یُد در سه تکرار بر گیاهان محلولپاشی شد. پس از ورود 90 درصد بوتهها به فاز گلدهی، برداشت شده و پارامترهای آزمایش اندازهگیری شد. نتایج تجزیه و تحلیل داده‌ها نشان داد که تیمار 4 پیپیام یُد در حضور نور LED بیشترین محتوای کلروفیل کل (21/36 میکروگرم بر گرم وزن تر) را به خود اختصاص داد. همچنین بیشترین محتوای فلاونوئید (79/2 میلیگرم کوئرستین/گرم ماده خشک) و فنل کل (49/219 میلیگرم گالیک اسید/گرم ماده خشک) در تیمار 4 پیپیام یُد در حضور نور LED حاصل گردید. تیمار 6 پیپیام سلنیوم بههمراه 6 پیپیام یُد در حضور نور LED بالاترین محتوای پتاسیم برگ (3/9323 میکروگرم/گرم ماده خشک) و تیمار 4 پیپیام یُد در حضور نور LED بالاترین محتوای فسفر برگ (87/1 میکروگرم/گرم ماده خشک) را به خود اختصاص دادند. همبستگی مثبت و معنا‌داری بین صفت محتوای فنل کل و محتوای کربوهیدرات محلول (78/0)، محتوای کلروفیل a (50/0)، محتوای کلروفیل b (74/0)، محتوای کلروفیل کل (60/0)، محتوای کارتنوئید (56/0) و محتوای فسفر (82/0) مشاهده شد. به‌طور کلی، با توجه به نقش و تأثیر تیمار 4 پیپیام یُد و حضور نور LED در بهبود کیفیت ریحان دارچینی، این تیمار جهت مطالعات بعدی پیشنهاد میگردد.
Recent projects have shown the effect of LED lighting on the accumulation of anthocyanins and flavonoids in plants. To evaluate the horticultural and nutritional characteristics of cinnamon basil (Ocimum basilicum cv. Cinnamon) under supplementary blue light and elicitation with Selenium and Iodine, a factorial study was conducted in a randomized complete block design with three replications. The test factors were: LED light, foliar spraying with Selenium and Iodine at levels of 0, 2, 4, and 6 ppm (total 96 test units). After sowing the seeds in the seedling tray and after the seedlings had 4 leaves, after transferring the seedlings to pots, the plants were placed under blue light conditions and selenium and iodine fertilizers were dissolved in water at concentrations of (0, 2, 4, and 6 ppm) and given to the plants as fertilizer-irrigation. The results of data analysis showed, the Iodine treatment (at 4 ppm concentration) in the presence of LED light had the highest total chlorophyll content (21.36 μg/g wet weight). The highest flavonoid (2.79 mg Q/g D.W.) and total phenol content (219.49 mg GA/ g D.W.) was also obtained in the Iodine elicitation (at 4 ppm concentration) in the presence of LED light. The combined treatment of Selenium and Iodine (both at a concentration of 6 ppm) in the presence of LED light had the highest leaf potassium content (9323.3 µg/g D.W.) and highest leaf phosphorus content (1.87 µg/g D.W.) was measured at the 4 ppm iodine treatment in the presence of LED light. A positive and significant correlation was observed between the total phenol content trait and soluble carbohydrate content (0.78), chlorophyll a content (0.50), chlorophyll b content (0.74), total chlorophyll content (0.60), carotenoid content (0.56) and phosphorus content (0.82). In this study, the presence of light improved chlorophyll activity .
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