اثر زمان و دفعات محلول‌پاشی قبل از برداشت اسپرمین و گاما آمینوبوتیریک اسید بر عمرگلجایی و ‏کیفیت گل‌های بریده ژربرا رقم "‏‎“Stanza‎

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران

2 استادیار، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران

3 دانشیار، دانشکده کشاورزی، دانشگاه ایلام، ایلام، ایران

چکیده

به منظور حفظ کیفیت و افزایش عمر گلجایی گل‌های شاخه‌بریده ژربرا پس از برداشت، آزمایشی به‌صورت کرت­های خردشده بر پایه طرح کاملاً تصادفی در سال 1397 در گروه علوم باغبانی دانشگاه ایلام با چهار تکرار طراحی و اجرا گردید. تیمارهای آزمایش شامل محلول‌پاشی قبل از برداشت توسط تیمارهای اسپرمین دو میلی­­مولار و گاما آمینوبوتیریک اسید (گابا) یک میلی­مولار هر کدام به‌صورت دو مرحله محلول‌پاشی (زمان ظهور شاخه­ گل­دهنده و 7 روز پس از آن) و سه مرحله محلول‌پاشی (زمان ظهور شاخه گل­دهنده، 5 و 10 روز پس از آن) به‌عنوان کرت فرعی بودند که همراه با نمونه­های شاهد طی صفر، 3، 6 و 9 روز پس از برداشت به عنوان کرت اصلی آزمایش در دمای 1±22 درجه سانتی­گراد و رطوبت نسبی 65 تا70 درصد مورد مطالعه قرار گرفتند. نتایج نشان داد تیمارهای اسپرمین سه مرحله محلول‌پاشی، اسپرمین دو مرحله محلول‌پاشی، گابا سه مرحله محلول‌پاشی و گابا دو مرحله محلول‌پاشی به‌ترتیب بین 5/3 تا یک روز عمر گلجایی را نسبت به شاهد افزایش دادند و باعث حفظ کیفیت پس از برداشت گل‌ها شدند. همچنین نتایج نشان داد که در روز نهم بررسی بیشترین وزن تر، جذب محلول گلجایی، مواد جامد محلول، پروتئین، فنل و فلاونوئید کل، فعالیت آنزیم‌های کاتالاز (CAT)، گایاکل پراکسیداز (GPX)، سوپراکسید دیسموتاز (SOD) و فنیل‌آلانین آمونیالیاز (PAL) و همچنین کمترین نشت یونی، محتوای مالون‌دی‌آلدهید (MDA) و فعالیت آنزیم پلی­فنل اکسیداز (PPO) به‌ترتیب در تیمارهای فوق مشاهده گردید. بنابراین استفاده از تیمار اسپرمین در سه مرحله محلول‌پاشی به‌عنوان برترین تیمار و به‌عنوان برنامه­ای کاربردی در جهت افزایش عمر گلجایی گل‌های شاخه‌بریده ژربرا رقم "Stanza" توصیه می­گردد.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of time and stage of preharvest spraying by spermine and γ-aminobutyric ‎acid on vase life and postharvest quality of "Stanza" cultivar of Gerbera cut flowers

نویسندگان [English]

  • Meysam Mohammadi 1
  • Mitra Aelaei 2
  • Mehdi Saidi 3
1 Ph.D. Candidate, Faculty of Agriculture, University of Zanjan, Zanjan, Iran
2 Assistant Professor, Faculty of Agriculture, University of Zanjan, Zanjan, Iran
3 Associate Professor, Faculty of Agriculture, Ilam University, Ilam, Iran
چکیده [English]

In order to maintain the postharvest quality and vase life of the "Stanza" cultivar of gerbera cut flowers, an experiment was designed as split-plot for time based on a completely randomized design, with four replications, at 2018 in horticulture department of Ilam university. The treatments consisted of preharvest application of Spermine 2 mM and γ-Aminobutyric acid 2mM (GABA), as sub-plot, at two stages (2T) of spraying (the stage of emergence of flower branch and 10 days later) and three stages (3T) of spraying (the stage of emergence of flower branch, 7 and 10 days later) that investigated, as the main plot, at 0, 3, 6 and 9 days postharvest at 22±1 °C and relative humidity of 65 to 70%. The results showed that, respectively, spermine 3T, spermine 2T, GABA 3T and GABA 2T treatments increased vase life and maintaind postharvest quality of Gerbera cut flowers compared to the control. The results of the 9th day showed that the highest fresh weight, absorption of vase solution (VSU), soluble solids, protein, phenol and total flavonoid, activity of the catalase (CAT), guaiacol peroxidase (GPX), superoxide dismutase (SOD) and Phenylalanine ammonia lyase (PAL), as well as the lowest ion leakage (EL), malondialdehyde MDA and polyphenol oxidase (PPO) activity respectively were observed in Spermine and GABA treatments, and in some of the studied traits, there was no significant difference between two and three stages of spraying. Therefore, the use of spermine 3T as the best treatment in present study is recommended as an application method to increase the vase life of "Stanza" cultivar of gerbera cut flowers.

کلیدواژه‌ها [English]

  • Foliar Application
  • gerbera
  • polyamine
  • vase life
  • γ-aminobutyric acid
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