غربال ارقام توت فرنگی متحمل به سرمای زمستانه براساس برخی شاخص های فیزیولوژیکی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری گروه علوم باغبانی دانشکده کشاورزی دانشگاه بوعلی سینا، همدان

2 استاد گروه علوم باغبانی، دانشکدۀ کشاورزی، دانشگاه بوعلی سینا، همدان

3 دانشیار گروه علوم باغبانی دانشکده کشاورزی، دانشگاه بوعلی سینا، همدان

4 دانشیار گروه زراعت و اصلاح نباتات، دانشکدۀ کشاورزی، دانشگاه کردستان، سنندج

چکیده

به منظور بررسی تحمل به سرمای زمستانه هفت رقم توت­فرنگی، آزمایشی به­صورت آزمایش کرت­های خرد شده در قالب طرح بلوک­های کامل تصادفی، در دانشکده کشاورزی دانشگاه بوعلی سینا در سال 1393 انجام شد. بعد از اعمال تیمار دماهای پایین (4+، 5-، 10-، 15-، 20- و 25- درجه سانتی­گراد)، درصد نشت یونی برگ، شاخص خسارت یخ­زدگی، محتوی آب نسبی برگ، غلظت کلروفیل برگ و مقادیر نسبی پارامترهای فلورسنس کلروفیل سنجیده شد. اثر تیمار دمای پایین، رقم و برهم­کنش آنها بر همه صفات مورد ارزیابی در سطح احتمال یک درصد معنی­دار شد. نتایج مقایسه میانگین­ها نشان داد دامنه اختلاف ارقام برای صفات مورد ارزیابی در دمای 25- درجه سانتی­گراد بسیار بیشتر از سایر تیمارهای دمایی بود. همبستگی بالایی بین شاخص­های ارزیابی میزان تحمل ارقام به دمای پایین وجود داشت. ارقام ‘کارسنبرگ’ و ‘کویین الیزا’ با کمترین مقادیر درصد نشت یونی و درصد خسارت یخ­زدگی و بیشترین مقادیر کلروفیل و مؤلفه­های فلورسنس کلروفیل در دمای 25- درجه سانتی­گراد، به­ترتیب بیشترین تحمل به سرما را نشان دادند. کمترین تحمل به سرما، در ارقام ‘چاندلر’ و ‘تنسی بیوتی’ با بیشترین درصد نشت یونی و درصد خسارت یخ­زدگی و کمترین مقادیر کلروفیل و مؤلفه­های فلورسنس کلروفیل در دماهای پایین مشاهده شد.

کلیدواژه‌ها

عنوان مقاله [English]

Screening of winter cold tolerant strawberry cultivars based on physiological indices

نویسندگان [English]

  • Farhad Karami 1
  • Mansour Gholami 2
  • Ahmad Ershadi 3
  • Adel Sio Se Mardeh 4
1 Ph.D. Student, Department of Horticultural Sciences, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran
2 Professor, Department of Horticultural Sciences, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran
3 Associate Professor, Department of Horticultural Sciences, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran
4 Associate Professor, Department of Agronomy and Plant Breeding, Faculty of Agriculture, Kurdistan University, Sanandaj, Iran
چکیده [English]

In this study, the winter cold tolerance of seven strawberry cultivars was evaluated using a RCBD design with a split plot arrangement at Bu-Ali Sina University in 2014. After exposure of plants to low temperatures (+4, -5, -10, -15, -20 and -25oC), the values of electrolyte leakage, index of freeze injury, RWC, total chlorophyll and chlorophyll fluorescence parameters (F0, Fm, Fv and Fv/Fm) were measured. Low temperature, cultivar and their interactions had significant effects (P≤0.01) on all measured parameters. Means slicing of traits showed that genotypic differences were most obviously identified in -25oC as compared to the other temperature treatments. There was strong correlations between the evaluation methods for screening winter cold tolerant cultivars. The strawberry `Karssenberg' and `Queen Elisa' were the most cold tolerant cultivars with the lowest electrolyte leakage and freeze injury index. These cultivars had the highest chlorophyll content and chlorophyll fluorescence rates in -25oC whereas `Chandler' and `Tennessie Beauty' with the highest electrolyte leakage and freeze injury index values, the lowest chlorophyll content and chlorophyll fluorescence rates in low temperatures, were the most susceptible cultivars to low temperatures.

کلیدواژه‌ها [English]

  • Chlorophyll fluorescence
  • electrolyte leakage
  • freezing injury
  • Screening
  • strawberry

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به نژادی گیاهان زراعی و باغی
دوره 3، شماره 2
آذر 1394
صفحه 215-228

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