Gibberellic Acid (GA3) and Benzyl Adenine (BA) Effects on the Vase Life of Cycad’s Cut Foliage
محورهای موضوعی : مجله گیاهان زینتیMaliheh Abshahi 1 , Hossein Zarei 2 , Azim Ghasemnezhad 3 , Mahnaz Aghdasi 4
1 - M.Sc. Graduated of Horticulture, Gorgan University of Agricultural Sciences and Natural Resources
2 - Faculty members of Gorgan University of Agricultural Sciences and Natural Resources, Collage of
Plant Production, Horticultural Department
3 - Faculty members of Gorgan University of Agricultural Sciences and Natural Resources, Collage of
Plant Production, Horticultural Department
4 - Faculty Member of Golestan University, Collage of Biology, Department of Plant Science
کلید واژه: Chlorophyll, Carotenoid, Water loss, Cycad, Treatments,
چکیده مقاله :
Cycad is one of the most important cut foliage plants with several usages. This experiment was focused on increasing the vase life of Cycad’s cut foliage in normal storage condition. Experiment was based on a CRD with three replications. Treatments were conducted for four different levels of gibberellic acid (GA3) and benzyl adenine (BA) each one with 0, 50, 100 and 150 mg L-1, according to mentioned statistical design. In all treatments except control, silver nitrate (AgNO3) with 40 mg L-1 and 3% sucrose were used. The measured traits were; vase life, chlorophyll and carotenoid content, water loss and some external quality factors. Results showed that GA3 had significant and positive effects on increasing the vase life of cycad’s cut foliage and kept the external quality in good condition. However, unlike the gibberellic acid, treatment with high concentration of BA decreased vase life of cycad’s cut foliage. Also, relation between storage time, BA and GA3 on most of measured external factors like leaflet dryness and fragility, were significant. The best treatments were selected as 50 mg L-1 GA3 without BA which increased the vase life of cycad’s leaves to 101 days in storage condition.
سیکاس یکی از مهم ترین گیاهان برگ بریده با کاربردهای متفاوت است. این پژوهش بر افزایش عمر گلدانی برگ های بریده گیاه سیکاس در شرایط انباری نرمال متمرکز شده است. آزمایش بر اساس طرح فاکتوریل و با سه تکرار انجام شد. بر اساس طرح آماری ذکر شده، تیمارها بر روی چهار سطح مختلف از اسید جیبرلیک (GA3) و بنزیل آدنین (BA)، هر یک با غلظتهای 0، 50، 100 و 150 میلی گرم بر لیتر مورد بررسی قرار گرفت. در تمام تیمارها به جز شاهد، نیترات نقره با غلظت ثابت 40 پی پی ام و ساکارز با غلظت ثابت 3 درصد استفاده شد. فاکتورهای اندازه گیری شده شامل عمر برگ، میزان کلروفیل و کاروتنوئید، کاهش آب و تغییر مشخصات ظاهری بوده است. نتایج نشان داد که اسید جیبرلیک اثرات مثبت و معنی داری بر افزایش عمر گلدانی برگ بریده سیکاس دارد و کیفیت برگ را در شرایط خوبی نگه می دارد با این حال، بر خلاف اسید جیبرلیک، تیمار با غلظت های بالای بنزیل آدنین عمر برگ سیکاس را کاهش داد. همچنین ارتباط بین زمان نگهداری، بنزیل آدنین و اسیدجیبرلیک در تعدادی از فاکتورهای ظاهری مانند خشکی و شکنندگی قابل توجه بود. بهترین تیمار، تیمار 50 پی پی ام اسیدجیبرلیک بدون بنزیل آدنین بود که عمر پس از برداشت برگ سیکاس را در شرایط انباری به 101 روز رساند.
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