Effects of seed priming with salicylic acid on chlorophyll a fluorescence parameters of basil (Ocimum basilicum L.) infested by field dodder (Cuscuta campestris Yunk.)

Document Type : Research Paper

Authors

1 PhD student of Crop Physiology, Department of Plant Eco-Physiology, University of Tabriz, Tabriz, Iran.

2 Department of Plant Eco-Physiology, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.

3 Department of Horticulture, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.

Abstract

This research was undertaken to assess the ameliorative effect of salicylic acid (0.5 mM) on photosystem II (PS II) in two basil (Ocimum basilicum L.) varieties (Iranian and Italian) infested with field dodder (Cuscuta campestris Yunk.) in the greenhouse of University of Tabriz, Iran, in 2017. The treatments were arranged as factorial using randomized complete block design with four replications. Results indicated that application of salicylic acid improved the maximum quantum efficiency of photosystem II (Fv/Fm) and performance index (PI) of basil plants infested by field dodder. The time span from F0 to Fm (TFM) and the energy necessary for the closure of all reaction centers (Sm) were significantly increased and the size of the plastoquinone pool (Area) declined in plants exposed to field dodder infestation. Application of salicylic acid increased the chlorophyll a fluorescence parameters studied in both basil varieties, especially in the Italian variety.

Keywords


Article Title [فارسی]

اثر پرایمینگ بذر با اسید سالیسیلیک روی پارامترهای فلورسانس کلروفیل a در ریحان آلوده به سس (Cuscuta campestris Yunk.)

Abstract [فارسی]

این تحقیق به منظور ارزیابی اثر بهبود دهنده اسید سالیسیلیک (5/0 میلی مولار) بر فتوسیستم II (PS II) در دو رقم ریحان (Ocimum basilicum L.) (ایرانی و ایتالیایی) آلوده به علف­ هرز سس مزرعه (Cuscuta campestris Yunk.) در شرایط گلخانه در دانشگاه تبریز در سال 1396 انجام شد. آزمایش در قالب فاکتوریل بر پایه طرح بلوک‌های کامل تصادفی در چهار تکرار  پیاده شد. نتایج نشان داد که کار برد اسید سالیسیلیک، حداکثر کارایی کوانتومی فتوسیستم II (Fv/Fm) و شاخص عملکرد فتوسنتزی (PI) را در ریحان آلوده به سس بهبود داد. در گیاهان آلوده به سس، مدت زمان لازم بین فلورسانس حداقل و حداکثر (TFM) و انرژی لازم برای بسته شدن مراکز واکنش (Sm) به طور معنی­ داری افزایش و میزان پلاستوکوئینون موجود (Area) کاهش یافت. استفاده از اسید سالیسیلیک پارامترهای مورد مطالعه فلورسانس کلروفیل a را در هر دو رقم ریحان افزایش داد، ولی این افزایش در رقم ایتالیایی بیشتر بود.

Keywords [فارسی]

  • اسید سالیسیلیک
  • پرایمینگ بذر
  • ریحان
  • سس
  • فلورسانس کلروفیل a
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