تاثیر اسید سالیسیلیک بر ترکیب عناصر غذایی برگ در انگور رقم بیدانه سفید در شرایط تنش شوری

نوع مقاله: مقاله پژوهشی

نویسنده

هیات علمی دانشگاه

چکیده

چکیده

شوری خاک از جدی‌ترین تهدید‌های محیطی برای بقاء گیاهان محسوب می‌گردد. برخی از تنظیم کننده‌های رشد مانند اسید سالیسیلیک باعث ایجاد مقاومت در گیاهان نسبت به تنش‌های محیطی مانند گرما، سرما، خشکی و شوری می‌‌شود. به‌منظور بررسی تاثیر کاربرد اسید سالیسیلیک بر ‌برخی ویژگی‌های رشدی و جذب عناصر در رقم انگور بیدانه سفید تحت شرایط تنش شوری، آزمایشی گلدانی به‌صورت فاکتوریل در قالب طرح کامل تصادفی انجام گرفت. قلمه‌های ریشه‌دار شده این رقم با پنج سطح شوری (همراه آب آبیاری) صفر (شاهد)، 25، 50 ، 75 و 100 میلی‌مولار کلرید سدیم و چهار سطح اسید سالیسیلیک (محلول‌پاشی برگساره‌ای) صفر (شاهد)، 100، 200 و 300 میلی‌گرم در لیتر تیمار گردیدند. با افزایش سطح شوری، وزن تر و خشک ریشه و شاخساره کاهش یافت. در سطح شوری 100 میلی مولار با کاربرد اسید سالیسیلیک (300 میلی‌گرم در لیتر) وزن خشک ریشه و شاخساره به‌ ترتیب 76/65 و 9/75 درصد کاهش در مقایسه با شاهد نشان داد. همچنین در این سطح شوری، غلظت یون‌های نیترات، 57 درصد، پتاسیم، 73 درصد، کلسیم، 4/62 درصد، منیزیم، 43 درصد، آهن، 54 درصد و میزان روی برگ، 75 درصد در مقایسه با شاهد (بدون تیمار اسید سالیسیلیک) کاهش نشان دادند. در سطح شوری 100 میلی مولار، بدون کاربرد اسید سالیسیلیک، میزان سدیم و کلر برگ به ترتیب 100 و 77/20 برابر در مقایسه با شاهد افزایش یافت. با کاربرد اسید سالیسیلیک میزان تجمع یون‌های سدیم و کلر در برگ کاهش یافتند. این پژوهش، نشان داد که در شرایط تنش شوری، کاربرد اسید سالیسیلیک می‌تواند بعضی از اثرات منفی ناشی از تنش شوری را (به‌‌ویژه در غلظت‌های کمتر از 50 میلی مولار) در این رقم انگور تعدیل نماید.

کلمات کلیدی: انگور، پتاسیم، تنش شوری، شاخص‌های رشدی، نیترات.

کلیدواژه‌ها


عنوان مقاله [English]

Impact of exogenous salicylic acid on leaf mineral composition of grapevine (Vitis vinifera L.cv Bidaneh Sefid) subjected to salinity

نویسنده [English]

  • jafar amiri
چکیده [English]

Abstract

Soil salinity is a major environmental threat for survival of plants. Researchs have shown that some plant growth regulators including salicylic acid improve the plants resistance to environmental stresses such as heat, cold, drought and salinity. To study the effect of salicylic acid (SA) application on some morphological characteristics and elements uptake of grapevine (Vitis vinifera L.) cv. Bidaneh Sefid under salinity stress condition, a pot experiment was conducted using a factorial based on randomized complete design. Well-rooted grapevine cuttings were treated with five levels of salinity 0 (control), 25, 50, 75 and 100 mM NaCl and four levels of SA (foliar application), 0 (control), 100, 200 and 300 mgl-1. The results indicated that with the increase in salinity levels, shoot and root fresh and dry weight decreased. However with salicylic acid application at the rate of 300 mgl-1 under salinity (100mM) these reductions were 65.76, 75.9 percent respectively. In 100 mM NaCl treatment, NO3-, K+, Ca2+, Mg2+, Fe2+ and Zn2+ content in leaf decreased 56.9% , 73%, 62.4%, 43%, 54.35% and 75% when compared to control plants, respectively. In salinity level 100 mM, without application of salicylic acid, Na+ and Cl- amount of leaves increased, 100 and 20.77 fold respectively compared with control. However, SA reduced the accumulation of Na+ and Cl- ions in leaves. In conclusion, the application of salicylic acid (200-300 mgl-1) ameliorated the adverse effects of salt stress, especially at salt concentrations lower than 50 mM in this cultivar.

Key Words: Growth parameters, Nitrate, pottasium, Salt stress, Vitis vinifera

کلیدواژه‌ها [English]

  • Key Words: Growth parameters
  • Nitrate
  • pottasium
  • Salt stress
  • Vitis vinifera
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