تأثیر گونه‌های تریکودرما بر رشد و جذب عناصر غذایی در گوجه‌فرنگی تحت تنش کم آبی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 بیولوژی و بیوتکنولوژی خاک، دانشکده کشاورزی، دانشگاه تبریز

2 بیماری‌شناسی گیاهی و قارچ‌شناسی، دانشکده کشاورزی، دانشگاه تبریز

3 روابط آب خاک و گیاه، دانشکده کشاورزی، دانشگاه تبریز

چکیده

تنش کم‌آبی به عنوان یکی از مهم‌ترین عوامل محدود‌کننده رشد گیاهی در سراسر جهان می‌باشد که جهت مقابله با این بحران راهکارهای متعددی از جمله استفاده از ریزجانداران محرک رشد گیاه نظیر تریکودرما پیشنهاد شده است. بنابر، این آزمایش با هدف بررسی تأثیر سه گونه تریکودرما بر فاکتورهای رشدی گوجه فرنگی و  نیز جذب  برخی عناصر غذایی توسط گیاه در شرایط تنش کم­آبی در قالب فاکتوریل بر پایه طرح بلوک‌های کامل تصادفی انجام شد. تیمارهای آزمایش شامل گونه‌های قارچی T1 (Trichoderma longibrachiatum KH) ، T2(T. longibrachiatum MA) ، T3(T. harzianum) ، NT1 (شاهد منفی- بدون قارچ) و NT2 (شاهد مثبت بدون قارچ ولی با تیمار کود شیمیایی) در سه سطح رطوبتی W0 (بدون تنش آب) ، W1 (تنش متوسط) و W2 (تنش شدید) بود که در سه تکرار انجام شد. نتایج نشان داد که با افزایش تنش آبی، در تمامی تیمارها وزن خشک بخش هوایی و ریشه و همچنین جذب عناصر کاهش یافت. اما این کاهش در تیمارهای قارچی به مراتب کمتر بود. در شرایط بدون تنش آب (W0)، تیمار قارچی T1 و  T2جذب نیتروژن و فسفر و تیمار قارچی T3 جذب آهن و روی را بطور معنی‌داری افزایش دادند. با تشدید تنش رطوبتی، اکثر پارامترهای اندازه‌گیری شده گیاه در تیمارهای قارچی به جز تیمار T1 کاهش یافت. در شرایط تنش شدید کم‌آبی (W2)، قارچ T1 منجربه افزایش وزن خشک بخش هوایی گیاه  (8/32% )، جذب نیتروژن (7/62% )، فسفر (7/34% )، آهن (3/39 % ) و روی (6/47% )در مقایسه با شاهد منفی شد.
 

کلیدواژه‌ها


عنوان مقاله [English]

The Effect of Trichoderma Isolates on Tomato Growth and Nutrients Uptake under Water Deficit Stress

نویسندگان [English]

  • Elaheh Khosh Manzar 1
  • Naser Aliasgharzad 1
  • Mahdi Arzanlou 2
  • Mohammad Reza Neyshabouri 3
  • Bahman Khoshrou 1
چکیده [English]

Water shortage is one of the most important limiting factors for plant growth around the world. To cope with this phenomenon, several solutions have been proposed, including the use of microorganism with plant growth promoting traits such as Trichoderma. Accordingly, an experiment was conducted to investigate the effect of three fungal species on tomato growth factors, as well as nutrients uptake by the plant in water deficit stress conditions in a factorial arrangement based on randomized complete block design. Treatments including T1 (Trichoderma longibrachiatum KH), T2 (T. longibrachiatum MA), T3 (T. harzianum), NT1 (negative control - without fungi) and NT2 (positive control – without fungi and with chemical fertilizer) at three moisture levels consist of W0 (none stress), W1 (medium stress) and W2 (severe stress), performed in three replications. The results indicated that dry weight of shoot and root and nutrients’ uptake decreased in all treatments as water stress increased, but this reduction was significantly lower in fungal treatments. Under none stress condition (W0), T1 and T2 treatments increased N and P absorption and T3 fungal treatments increased Fe and Zn absorption significantly. By increasing stress conditions, most of the measured parameters of the plant in fungal treatments were reduced except for T1 treatment. Under severe stress condition (W2), T1 enhanced dry weight (32.8%), N uptake (62.7%), P (34.78%), Fe (39.3%) and Zn (47.6%), compared to negative control.
 

کلیدواژه‌ها [English]

  • Fe
  • Nitrogen
  • Tomato
  • Trichoderma
  • Water deficit stress
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