Changes in Physiological Properties and Vase Life of Gerbera (Gerbera jamesonii) under Co-Application of Foliar Applied L-Glutamic Acid, Nitrogen and Potassium
محورهای موضوعی : مجله گیاهان زینتیSaeed Reza Farahmandi 1 , Saeed Samavat 2 , Mostafa Mostafavi 3 , Ali Mohammadi Torkashvand 4 , Sepideh Kalatejari 5
1 - Department of Horticultural Science and Agronomy, Science and Research Branch, Islamic Azad University, Tehran, Iran
2 - The Faculty of Soil and Water Research Institute, Meshkindasht, Iran
3 - The Faculty of Seed and Plant Research Improvement Institute, Karaj, Iran
4 - Department of Soil Science, Agricultural Faculty, Science and Research Branch, Islamic Azad University, Tehran, Iran
5 - Department of Horticultural Science and Agronomy, Science and Research Branch, Islamic Azad University, Tehran, Iran
کلید واژه: Vase life, Electrolyte leakage, Anthocyanin, Stem bending,
چکیده مقاله :
Vase life of cut flowers of many gerbera (Gerbera jamesonii) cultivars is typically short because of stem bending; therefore, stem bending that occurs during the early vase life period is a major problem in gerbera. Foliar application of amino acids and inorganic fertilizers is an effective practice to improve plant yield in agriculture and horticulture. This experiment was carried out to improve vase life of gerbera cut flowers through changes in relative fresh weight (RFW), anthocyanin content, electrolyte leakage (EL) and stem bending. The plants were treated by foliar application of 4 and 8 g L-1 L-glutamic acid (GA), 5 and 10 g L-1 potassium (K) and nitrogen (N). The results showed the greatest RFW was observed in flowers sprayed with 4 g L-1 GA, 5 g L-1 N and 5 g L-1 K to be 86.7 %. The 20 % reduction of EL was observed in flowers treated with co-application of 8 g L-1 GA, 10 g L-1 N and 5 g L-1 K as compared to control. The main enhancement of anthocyanin concentration was corresponded to GA application. Stem bending ranged from 63.1° in gerbera flowers supplied with non-GA, 5 g L-1 N and 5 g L-1 K to 73.9° in control plants. To sum up, 8 g L-1 GA in combination with 5 g L-1 N and 5 g L-1 K was chosen as an optimum treatment to improve vase life and decreased stem bending of gerbera cut flowers.
عمر پس از برداشت گل شاخه بریده ژربرا به دلیل خمیدگی ساقه شاخه گل‌دهنده به طور کلی کوتاه است. بنابراین خمیدگی ساقه ژربرا مشکل اصلی این گل در دوره پس از برداشت است. محلول‌پاشی با اسیدهای آمینه و کودهای معدنی از روش‌های مفید در افزایش عملکرد محصولات کشاورزی و باغبانی است. تحقیق حاضر به منظور بهبود عمر پس از برداشت گل ژربرا با بررسی تغییرات وزن تر نسبی، محتوای آنتوسیانین گلبرگ، نشت یونی، و درجه خمیدگی ساقه انجام شد. گلوتامیک اسید با 4 و 8 گرم در لیتر و کودهای نیتروژن و پتاسیم با 5 و 10 گرم در لیتر به صورت محلول‌پاشی اعمال شد. نتایج نشان داد که بیشترین مقدار وزن تر نسبی با 86/7 درصد در تیمار 4 گرم در لیتر گلوتامیک اسید، 5 گرم در لیتر نیتروژن و 5 گرم در لیتر پتاسیم مشاهده شد. کاهش 20 درصدی نشت یونی در گل‌های تیمار شده با 8 گرم در لیتر گلوتامیک اسید، 10 گرم در لیتر نیتروژن و 5 گرم در لیتر پتاسیم در مقایسه با کنترل گزارش شد. افزایش اصلی غلظت آنتوسیانین مربوط به تیمارهای حاوی گلوتامیک اسید بود. خمیدگی ساقه گل از 63/1 درجه در تیمار عدم کاربرد گلوتامیک اسید، 5 گرم در لیتر نیتروژن و 5 گرم در لیتر پتاسیم تا 73/9 درجه در تیمار کنترل (عدم محلول‌پاشی) متغییر بود. نتیجه کلی تحقیق نشان داد که 8 گرم در لیتر گلوتامیک اسید، 5 گرم در لیتر نیتروژن و 5 گرم در لیتر پتاسیم مناسب‌ترین تیمار جهت افزایش عمر پس از برداشت و کاهش خمیدگی ساقه گل ژربرا می‌باشد.
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