‌پاسخ دو رقم زیتون (ماری و میشن) به تیمار سایکوسل تحت شرایط تنش خشکی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی سابق کارشناسی ارشد، دانشیار و استادیار، گروه علوم باغبانی، دانشکدۀ کشاورزی، دانشگاه ارومیه، ارومیه

2 دانشیار گروه زیست‏شناسی، دانشکدۀ علوم، دانشگاه ارومیه، ارومیه

چکیده

به‌منظور بررسی اثر سایکوسل بر جنبه‏های مختلف رشد دو رقم زیتون (ماری و میشن) در شرایط تنش خشکی، آزمایش گلخانه‏ای با سه فاکتور شامل سه سطح سایکوسل (0، 500 و 1000 میلی‏گرم در لیتر)، سه سطح تنش خشکی (آبیاری نهال‏ها با فواصل 5، 10 و 15 روز یک‌بار) و دو رقم زیتون (ماری و میشن) به‌صورت فاکتوریل در قالب طرح بلوک‏های کامل تصادفی با سه تکرار و در مدت چهار ماه انجام شد. نتایج نشان داد که تیمارهای سایکوسل موجب کاهش سطح برگ، افزایش ضخامت برگ، میزان کلروفیل و قندهای محلول در مقایسه با شاهد شدند‌ اما تأثیر معنا‏داری بر دمای برگ نداشتند. تیمار بالای سایکوسل (1000 میلی‌گرم در لیتر) موجب افزایش میزان پرولین و محتوای نسبی آب‌ برگ (RWC) نسبت به دیگر تیمارها شد. همچنین نتایج نشان داد که افزایش سطوح خشکی موجب کاهش سطح برگ،RWC ، افزایش ضخامت برگ، دمای برگ، میزان کلروفیل، پرولین و قند‌های محلول در هر دو رقم شد. از نظر صفات مطالعه‌شده، رقم میشن نسبت به رقم ماری مقاومت بیشتری به خشکی داشت. نتایج نشان داد که سایکوسل می‏تواند اثر منفی ناشی از تنش خشکی در ارقام ماری و میشن زیتون را تعدیل کند.

کلیدواژه‌ها

عنوان مقاله [English]

Response of tow olive cultivars (Mary and Mission) to exogenous cycocel treatments under drought stress

نویسندگان [English]

  • Vahid Akbari 1
  • Rasool Jalilimarandi 1
  • Jalil Khara 2
  • Alireza Farokhzad 1
1 . Former M. Sc. Student, Associate and Assistant Professor, Department of Horticultural Sciences, Faculty of Agriculture, Urmia University, Urmia, Iran
2 . Associate Professor, Department of Biology, Faculty of Science, Urmia University, Urmia, Iran
چکیده [English]

In order to investigate the effect of cycocel on different growth aspects of two olive cultivars (Mary and Mission), a greenhouse experiment was conducted taking into account three factors of: cycocel at three levels (0, 500 and 1000 mg L-1), drought stress of three levels (irrigated at 5, 10 and 15 days intervals) and two olive cultivars (Mary and Mission) in a factorial experiment based on randomized complete block design of three replicates during four months. The results showed that both cycocel treatments decreased leaf area, increased leaf thickness, chlorophyll content and soluble sugars, but no significant difference in leaf temperature was observed compared with the control. High cycocel treatments (1000 mg L-1) increased proline and relative water content (RWC) compared with the other treatments. Also, results showed that increased periods of drought reduced leaf area, RWC, but increased leaf thickness, leaf temperature, chlorophyll content, proline and soluble sugars in both cultivars. In above-mentioned parameters, 'Mission' showed higher resistance to drought stress than 'Mary'. Results suggested that cycocel treatment can neutralize some negative effects of drought stress in 'Mary' and 'Mission' of olive trees.

کلیدواژه‌ها [English]

  • Leaf area
  • relative water content (RWC)
  • soluble sugars
  • proline
  • leaf temperature

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  • تاریخ دریافت: 10 مهر 1392
  • تاریخ بازنگری: 02 شهریور 1394
  • تاریخ پذیرش: 11 مرداد 1393

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