تأثیر متقابل شدت نور و اسید سالیسیلیک بر برخی خصوصیات فیزیولوژیکی، عملکرد و کیفیت میوه گوجه‌فرنگی (Solanum lycopersicum)

نوع مقاله: مقاله پژوهشی

نویسنده

استادیار گروه علوم باغبانی، دانشکده کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی. اردبیل، ایران

چکیده

شدت نور یکی از مهم‌ترین عوامل محیطی مؤثر بر رشد، عملکرد و کیفیت سبزی‌های میوه‌ای می‌باشد. اسید سالیسیلیک تأثیر منفی شدت نور بالا و پایین را تعدیل می‌نماید. در این تحقیق ﺑﻪ‌ﻣﻨﻈﻮر بررسی تأثیر سطوح مختلف شدت نور (100، 75 و 50 درصد شدت نور) و اسید سالیسیلیک (0 و 2 میلی‌مولار) بر خصوصیات فیزیولوژیکی، عملکرد و کیفیت گوجه‌فرنگی، آزمایشی به‌صورت کرت‌های خردشده بر پایه طرح بلوک‌های کامل تصادفی با سه تکرار در مزرعه دانشکده کشاورزی و منابع طبیعی مغان واقع در استان اردبیل در سال 1395 اجرا گردید. نتایج نشان داد که وزن تر و خشک گیاه با کاهش شدت نور به‌ویژه در تیمار شاهد (0 میلی‌مولار اسید سالیسیلیک) به‌طور معنی‌داری کاهش یافت. هدایت روزنه‌ای برگ و نسبت Fv/Fm با کاهش شدت نور افزایش یافت. کاربرد اسید سالیسیلیک هدایت روزنه‌ای برگ و نسبت Fv/Fm را بهبود بخشید. کاربرد اسید سالیسیلیک باعث افزایش تعداد گل‌آذین و تعداد میوه در گل‌آذین در سطوح مختلف شدت نور شد. عملکرد گوجه‌فرنگی در تیمار شدت نور کامل و محلول‌پاشی ‌شده با اسید سالیسیلیک 116 درصد بیشتر از گیاهان رشد کرده در شدت نور 50 درصد و تیمار بدون اسید سالیسیلیک بود.بیشترین و کمترین مواد جامد محلول میوه، سفتی میوه، هدایت الکتریکی و اسیدیته عصاره میوه به‌ترتیب در شدت نور کامل و در شدت نور 50 درصد به‌دست آمد.به‌طور کلی نتیجه‌گیری می‌شود که گوجه‌فرنگی‌ها در شدت نور کامل عملکرد و کیفیت بهتری داشتند و کاربرد اسید سالیسیلیک توانست خصوصیات کمی و کیفی گوجه‌فرنگی را در شدت نور مختلف بهبود بخشد.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of Light Intensity and Salicylic Acid Interaction on Some Physiological Characteristics, Yield and Fruit Quality of Tomato (Solanum lycopersicum)

نویسنده [English]

  • Rasoul Azarmi
Assistant Professor, Department of Horticultural Sciences, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran
چکیده [English]

Light intensity is one of the most important environmental factors affecting the growth, yield and quality of fruits and vegetables. Salicylic Acid (SA) alleviates the negative effect of high and low light intensity. In order to evaluate the effect of interaction between light intensity and SA  on physiological properties, yield and fruit quality of tomato (Solanum lycopersicum L. cv. Super Beta F1), a split plot based on randomized complete block design experiment with three replications was carried out at Moghan College of Agriculture and Natural Resources located in Ardabil province, Iran in 2015. The treatment were included differentlight intensity levels (100, 75 and 50% light intensity) and SA (0 and 2 mM). Results revealed that the plant fresh and dry weight was decreased significantly with decreasing light intensity, especially without SA treatment. The leaf stomatal conductance and Fv/Fm ratio were increased with decreasing light intensity. The application of SA improved leaf stomatal conductance and Fv/Fm ratio. The application of SA caused increase in truss number and fruit number per truss under different light intensity levels. Tomato yield in full light intensity treatment and treated with SA was 116% higher than tomatoes yield grown in 50% light intensity and without treatment with SA. The highest and lowest value of total soluble solid, fruit firmness, EC and pH of fruit juice were obtained in full light intensity and 50% light intensity, respectively. In general, it is concluded that tomatoes grown in full light intensity has better yield and quality. SA application improves the quantitative and qualitative properties of tomato in different light intensities.

کلیدواژه‌ها [English]

  • Stress modulation
  • Shading
  • Tomato
  • Qualitative characteristics
  • Quantitative characteristics

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