نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی سابق دکتری، گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه شیراز
2 استاد، گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه شیراز
3 دانشیار، گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه شیراز
4 استادیار، گروه مهندسی آب، دانشکده کشاورزی دانشگاه شیراز
چکیده
به خاطر کمبود منابع آب شیرین، این پژوهش با هدف تعیین دامنه تحمل شوری توتفرنگی رقمهای ʼ پاروسʻ و ʼ آروماسʻ و نقش احتمالی براسینواستروئید در تخفیف اثر منفی شوری برنامهریزی شد. در این پژوهش محلول‌پاشی برگی با 24- اپی براسینولید (0، 25/0، 5/0 و 1 میلی گرم در لیتر) و چهار سطح شوری (0، 20، 40 و60 میلیمولارکلرید سدیم) بهصورت آزمایش فاکتوریل در قالب طرح کاملاً تصادفی با چهار تکرار در شرایط آبکشت در گلخانه اجرا شد. نشاهای ریشهدار در گلدانهای پلاستیکی چهار لیتری حاوی محیط کشت پرلایت و کوکوپیت (1:1) کشت شدند. نتایج نشان داد که شوری به‌طور معنیداری باعث کاهش عملکرد گیاه گردید، در غلظت 60 میلیمولار حدود 44 درصد کاهش عملکرد در گیاهان تحت تنش شوری مشاهده شد. کاربرد براسینواستروئید در غلظتهای 5/0 و 1 میلیگرم در لیتر توانست اثر منفی شوری بر کاهش عملکرد را کاهش دهد. همچنین باعث افزایش سطح برگ، وزن خشک شاخساره، ریشه و عملکرد گردید. بنابراین، براساس نتایج بهدستآمده در این پژوهش استفاده از تیمار براسینواستروئید با غلظتهای 5/0 و 1 میلیگرم در لیتر، راهکاری مناسب در جهت حل مشکلات ناشی از تنش شوری میباشد و رقم ʼآروماسʻ نسبت به تنش شوری و محلول‌پاشی با براسینواستروئید پاسخ بهتری نسبت به رقمʼپاروسʻ نشان داد.
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
Effect of foliar application of Brassinosteroids on growth, yield and fruit quality of two strawberry cultivars under salt stress in soilless culture
نویسندگان [English]
- Ebrahim Latifikhah 1
- Saied Eshghi 2
- Ali Gharaghani 3
- Enayatollah Tafazoli 2
- Fatemeh Razaghi 4
1 Former Ph.D. Student, Department of Horticultural Sciences, Faculty of Agriculture, Shiraz University, Shiraz, Iran
2 Professor, Department of Horticultural Sciences, Faculty of Agriculture, Shiraz University, Shiraz, Iran
3 Associate Professor, Department of Horticultural Sciences, Faculty of Agriculture, Shiraz University, Shiraz, Iran
4 Assistant Professor, Department of Water Engineering, Faculty of Agriculture, Shiraz University, Shiraz, Iran
چکیده [English]
Due to lack of fresh water sources, and the inevitability of using unconventional waters, a study was conducted to determine the tolerance of strawberry to salinity for ʻParosʼ and ʻAromasʼ cultivars and the possible role of brassinosteroids in reducing the negative effects of salinity. In this study the effect of 24-epibrassinolide concentrations (0, 0.25, 0.5 and 1 mg/L as foliar spray) and salinity levels (0, 20, 40 and 60 mM in nutrient solution) were evaluated on growth, yield and fruit quality of strawberry in soilless culture under greenhouse conditions. Rooted daughter plants of 'Aromas’ and ‘Paros’ strawberry cultivars were potted in 4 L plastic pots filled with cocopeat and perlite (1:1 V/V). Results showed that salinity (60 mM) reduced 44% of strawberry yield. The use of brassinosteroid could reduce the negative effect of salinity on reducing yield and all the concentrations used of BRs could increase the yield compared to the control. Foliar application of brassinosteroids at 0.5 and 1 mg / L resulted in increased leaf area, shoot and root dry weight and yield. Foliar application of brassinosteroids at 0.5 and 1 mg / L levels reduced the effects of salinity stress. In general, BRs could mitigate the detrimental effect of saline conditions on growth of strawberry plants, especially at 0.5 and 1 mg/L concentrations. In general, the use of brassinosteroids, especially at a concentration of 1 mg / L, under mild salinity conditions could reduce the effect of salinity stress on strawberry growth, and this effect was more pronounced on the cultivar ʻAromasʼ. Therefore, based on the results, this method is a suitable solution for solving problems caused by salt stress.
کلیدواژه‌ها [English]
- 24-epibrassinolide
- Fragaria × ananassa Duch
- morphological characteristics
- physiological process
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