Postharvest GABA Application Effects on Some Biochemical Characteristics of Anthurium Cut Flowers under Cold Storage Conditions

محورهای موضوعی : مجله گیاهان زینتی

Farima Mahjoory ¹ (Former MSc. Student, Department of Horticultural Sciences, University of Maragheh, Iran)
Asghar Ebrahimzadeh ² (Assistant Professor, Department of Horticultural Sciences, University of Maragheh, Iran)
Mohammad Bagher Hassanpouraghdam ³ (Associate Professor, Department of Horticultural Sciences, University of Maragheh, Iran)
Mohammad Ali Aazami Mavaloo ⁴ (Assistant Professor, Department of Horticultural Sciences, University of Maragheh, Iran)

تاریخ دریافت : 1397/09/02 تاریخ پذیرش : 1397/12/11 تاریخ انتشار : 1398/03/11

کلید واژه: Proline content, Chilling injury, Spathe browning tropical flowers, γ–Amino butyric Acid,

چکیده مقاله :

Chilling damage under 15ºC in anthurium cut flowers reduces the vase-life, quality and marketability of the product. In the present experiment, GABA postharvest treatment (0, 1 and 5 mM) was studied on the vase-life, total soluble solid (TSS), H2O2 content, proline content, spathe browning, catalase and superoxide dismutase enzymes activity of Anthurium andraeanum 'Sirion' during 10 days of storage at 10 ºC and 5 ºC. The results revealed that 1 mM GABA treatment at 10 ºC was the treatment of choice considering the vase-life. GABA treatment had no special effect on reducing the browning incidence. GABA at 5 mM increased the SOD activity. Furthermore, GABA reduced H2O2 levels compared to control untreated flowers. Moreover, under chilling stress, proline was the highest with GABA treated flowers. One mM treated GABA treatments hold higher catalase activity. The highest TSS belonged to 5 mM GABA under 5ºC.

چکیده انگلیسی:

نگهداری گل‌ شاخه بریده آنتوریوم در دماهای زیر 15 درجه سانتیگراد منجر به صدمه سرمازدگی و کاهش کیفیت و کوتاهی عمر پس از برداشت آنها می‌گردد. در این تحقیق، تأثیر تیمار پس‌از‌برداشت گاما‌آمینوبوتیریک‌اسید (گابا) در غلظت‌های صفر(شاهد)، یک و پنج میلی‌مولار بر روی طول عمر گلجائی، قهوه‌ای شدن اسپات، میزان فعالیت آنزیم کاتالاز و سوپراکسیددیسموتاز، مقدار پراکسید هیدروژن، مقدار پرولین و مواد جامد محلول در گل شاخه بریده آنتوریوم‘Sirion’در طول 10 روز نگهداری در دماهای 10 و پنج درجه سانتیگراد مورد بررسی قرار گرفت. نتایج این تحقیق نشان داد که بیشترین عمر گلجائی گل‌ها در غلظت یک میلی‌مولار از گابا و در دمای 10 درجه سانتیگراد حاصل شد. تیمار گابا تأثیری در کاهش قهوه‌ای شدن اسپات نداشت. سطوح پراکسید هیدروژن در گل‌های تیمار شده با گابا در مقایسه با گل‌های شاهد کاهش یافت. شاخص پرولین در گل‌های تیمار شده با گابا بالاتر از میزان آن در گل‌های شاهد بود. بالاترین میزان مواد جامد محلول به گل‌های تیمار شده با گابای پنج میلی مولار و دمای پنج درجه سانتیگراد اختصاص یافت. تیمار با گابای پنج میلی مولار سبب بالارفتن میزان فعالیت آنزیم سوپراکسیددیسموتاز شد. گل‌های تیمار شده با گابای یک میلی‌مولار فعالیت بالای آنزیم کاتالاز را نشان دادند.

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