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اهداف و چشم انداز

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تأثیر غلظت‌های مختلف اسپرمیدین بر کیفیت میوه زردآلو رقم شاهرودی طی مراحل مختلف برداشت

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانش‌آموخته کارشناسی ارشد علوم باغبانی، علوم باغبانی، دانشکده کشاورزی، دانشگاه تبریز‌، تبریز، ایران

2 استاد، گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه تبریز، تبریز، ایران

چکیده

چکیده
هدف از این پژوهش ارزیابی تأثیر تیمار قبل از برداشت اسپرمیدین در مراحل مختلف رسیدگی میوه زردآلوی رقم شاهرودی با توجه به زمان های برداشت بود. میوه‌های زردآلو با سه تیمار اسپرمیدین (صفر، 2 و 3 میلی‌مولار) در سه زمان برداشت در مزرعه تحقیقیات خلعت پوشان وابسته به دانشگاه تبریز(سیزدهم، شانزدهم و نوزدهم تیرماه 1396) در چهار تکرار در قالب آزمایش فاکتوریل بر پایه طرح بلوک‌های کامل تصادفی تیمار شدند. صفات کیفی اندازه‌گیری‌شده شامل مواد جامد محلول کل (TSS)اسیدیته قابل تیتراسیون (TA)، ویتامین ث، سفتی بافت میوه، pH عصاره میوه، فنل، فلاونوئید و ظرفیت آنتی‌اکسیدانی کل بودند. نتایج نشان داد صفات مورد مطالعه در سطح احتمال یک درصد اختلاف معنی داری با شاهد نشان دادند و در زمان‌های مختلف برداشت تغییر کردند. تیمار سه میلی‌مولار اسپرمیدین بهترین نتیجه را در میان تیمارها به خود اختصاص داد و باعث شد صفات کیفی اندازه گیری‌شده بهبود یابند. تیمار سه میلی‌مولار اسپرمیدین در طول هر سه مرحله بیشترین تأثیر را روی ظرفیت آنتی‌اکسیدانی کل (01/3 درصد)، ویتامین ث (3/29 درصد) و سفتی بافت (3/27 درصد) میوه داشت. میان تیمار دو و سه میلی‌مولار اسپرمیدین در صفاتی مانند TSS و TA اختلاف معنی‌داری مشاهده نشد اما نسبت به شاهد اختلاف معنی‌داری داشتند. در میان برداشت‌ها، برداشت دوم (برداشت تجاری) از نظر حفظ کیفیت میوه‌ها بهترین برداشت بود و باعث شد که صفات ارزیابی‌شده در تعادل باشند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of Different Concentrations of Spermidine at Different Harvesting Times on the Quality of Apricot Fruits ”Shahroudi“ Cultivar

نویسندگان [English]

  • Jassim Taha 1
  • Jafar Hajilou 2

1 M.Sc. Graduate of Horticulture,, University of Tabriz of Agricultural Science, Department of Horticultural Science, Tabriz, Iran

2 Professor, Department of Horticulture, Faculty of Agriculture, Tabriz University, Tabriz, Iran

چکیده [English]

 
Abstract
 
Background and Objectives
Apricot is one of the most important horticultural crops because of its attractive taste and nutritive value. Different cultivars of apricot contain highly variable content of ascorbic acid, cartenoids, and phenolic compound,which are good sourecs of antioxidant. Fuit quality is an important trait for concumers and producers. The purpose of this work was to estimate the effects of pre-harvest application of polyamines on quality characteristics of apricot fruits at the end of fruit ripening process.
 
Materials and Methods
The experiment was carried out as a factorial based on the randomized complete block design (three concentrations of spermidine at three harvesting time) with four replications. The selected branches of trees were sprayed as a pre-harvesting application method by three concentrations of spermidine (0, 2, and 3 mili molar) 7 days before commercial harvesting time. Fruits were harvested during harvesting times (3 days interval) and then some fruit characteristics such as total soluble solids (TSS), total ccidity (TA), vitamin C, firmness of fruit tissue, pH of fruit extract, total phenol, flavonoid, and total antioxidant capacity were measured in the laboratory of flower biology and fruit growth development at the department of horticulture, faculty of agiculture, university of Tabriz.
 
Results
The results showed that the effects of different harvesting times were significant regarding all traits. The best results were observed in 3 mM spermidine and this treatment improved all the measured characteristics of fruit. The highest value of total antioxidant capacity (3.01%), vitamin C (3.29%), and fruit firmness (3.27%) were found in 3 mM spermidin at three harvesting times. In some characteristics such as TSS and TA, there was no significant difference between 2 and 3 mM spermidine, but among treated and non-treated fruit a full significant difference was observed. We assume that the second harvesting time can be the best harvesting time regarding fruit quality parameters. During fruit ripening, the amount of TSS and TA increased, while firmness, total phenolic, and flavonoids compounds and total antioxidant capacity decreased gradually.
 
Discussion
Fruit physicochemical properties are very important for understanding the product behaviour during the harvesting, transporting, packaging, and storing of fruit crops. The results of this study showed that the pre-harvesting application of polyamines delayed the ripening and increased the quality of fruit during the different harvestings times.
 

کلیدواژه‌ها [English]

  • Harvesting time
  • Pre-harvesting treatment
  • Quality chracteristics
  • Total antioxidant capacity
مراجع
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 © 2020 by the authors. Licensee SCU, Ahvaz, Iran. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-Non Commercial 4.0 International (CC BY-NC 4.0 license) (http://creativecommons.org/licenses/by-nc/4.0/)
تولیدات گیاهی
دوره 43، شماره 3
آبان 1399
صفحه 409-418
فایل ها
هم رسانی
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