Salicylic acid is associated with improved growth and resistance of olives (Olea europaea L.) to Verticillium wilt

Document Type : Research Paper

Authors

Department of Plant Protection, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran

Abstract

To improve the growth of olive and find a suitable approach for controlling Verticillium dahlia in this plant, treatment of different cultivars by salicylic acid (SA) was evaluated. Nine-month-old seedlings of Koroneiki, Marry, Rowghani, and Zard cultivars were pre-treated with 0, 5, and 10 mM SA at 15-days intervals, and then roots were inoculated by dipping into a defoliating isolate of V. dahliae. The dry weight of different tissues was measured separately at the end of the trial (14 weeks after inoculation). The response was assessed by grading the severity of symptoms on the 0-4 scale and calculating the area under the disease progress curve. Also, the concentration of phenolic compounds in the root tissues, the activity of the superoxide dismutase enzyme, the final intensity of symptoms, and the percentage of dead plants were measured. Foliar spray of 10 mM SA increased the vegetative growth of the olive cultivars. The results showed that treatment with SA decreases the severity of Verticillium wilt. The root phenol level and the activity of superoxide dismutase were significantly higher in the plants treated with 10 mM SA as compared to the control plants. Disease progression had a negative relationship with the superoxide dismutase activity and total phenols of the roots in olive cultivars. 

Keywords

Article Title [Persian]

ارتباط اسید سالیسیلیک با بهبود رشد و تحریک مقاومت زیتون (Olea europaea L.) به پژمردگی ورتیسیلیومی

Authors [Persian]

  • عببدالحسین طاهری
  • سیدجواد صانعی
  • سید اسماعیل رضوی
گروه گیاهپزشکی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان
Abstract [Persian]

به‌ منظور بهبود رشد و پیدا کردن یک روش مناسب برای کنترل Verticillium dahliae، عامل پژمردگی ورتیسیلیومی، تیمار ارقام زیتون توسط اسید سالیسیلیک (SA) مورد مطالعه قرار گرفت. در این بررسی، نهال‌های نُه ‌ماهه زیتون شامل کورونایکی، ماری، روغنی و زرد پس از تیمار توسط SA با غلظت‌های 0، 5 و 10 میلی‌مولار با جدایه برگ ­ریز V. dahliae، جدا شده از زیتون از منطقه گرگان، به‌روش غوطه‌ور کردن ریشه مایه‌زنی شدند. محلول‌پاشی گیاهان زیتون هر 15 روز یک بار توسط SA انجام شد. در پایان آزمایش، 14 هفته پس از مایه‌زنی، وزن خشک بخش ­های مختلف گیاه به‌ طور جداگانه اندازه‌گیری شد. مقاومت با تعیین شدت علائم با استفاده از مقیاس 4-0 و محاسبه سطح زیر منحنی پیشرفت بیماری ارزیابی شد. درصد گیاهان خشک شده، میانگین شدت علائم نهایی، فراوانی جداسازی V. dahliae از بافت آوندی، فنل کل و فعالیت آنزیم سوپراکسید دیسموتاز نیز مدنظر قرار گرفت. نتایج نشان داد که محلول‌پاشی برگ‌ها با غلظت 10 میلی‌مولار SA با افزایش رشد رویشی همراه است. SA شدت بیماری را کاهش ‌داد. گیاهان تیمار شده میزان فنل ریشه و فعالیت سوپراکسید دیسموتاز بیشتری  نسبت به گیاهان شاهد داشتند. پیشرفت بیماری با میزان فنل ریشه و فعالیت سوپراکسید دیسموتاز رابطه منفی داشت.

Keywords [Persian]

  • اسید سالیسیلیک
  • ارقام زیتون
  • پژمردگی ورتیسیلیومی
  • سوپراکسید دیسموتاز
  • فنل کل

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Journal of Plant Physiology and Breeding
Volume 11, Issue 1
June 2021
Pages 75-85

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