ارزیابی تأثیر پاکلوبوترازول و ترینگزاپک‌اتیل بر ویژگی‌های ریخت‌شناختی و فیزیولوژیکی دو گیاه پرچینی رزماری (Rosmarinus officinalis) و نوش (Thuja orientalis “Morgan”)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی سابق کارشناسی ارشد، دانشکدۀ کشاورزی، دانشگاه آزاد اسلامی واحد خوراسگان (اصفهان)

2 دانشیار، دانشکدۀ کشاورزی، دانشگاه صنعتی اصفهان

3 دانشیار، دانشکدۀ کشاورزی، دانشگاه شهرکرد

چکیده

در سال­های اخیر استفاده از تنظیم­کننده­های رشد به‌ویژه کندکننده­های رشد افزایش چشمگیری یافته است. تریازول­ها (پاکلوبوترازول و ترینگزاپک اتیل) به‌عنوان مؤثرترین و کم‌خطرترین کندکننده­های رشد سبب ایجاد گیاهان پوششی کوتاه‌تر و متراکم­تر می­شود که برگ‌های سبز تیره­تر و ضخیم­تر دارد. برای ارزیابی تأثیر پاکلوبوترازول و ترینگزاپک­اتیل بر ویژگی‌های ریخت‌شناختی (مرفولوژیکی) و فیزیولوژیکی دو گیاه پرچینی (رزماری و نوش رقم مورگان) آزمایشی در قالب طرح بلوک کامل تصادفی شامل شانزده تیمار و سه تکرار اجرا شد. بدین منظور بی‌درنگ پس از هرس هر دو گیاه، محلول­پاشی برگی پاکلوبوترازول با غلظت­های 1000 و 4000 میلی­گرم در لیتر، ترینگزاپک­اتیل با غلظت 1000 میلی­گرم در لیتر و آب مقطر به‌عنوان شاهد انجام شد. صفات مورد اندازه‌گیری در این پژوهش شامل ارتفاع، طول و عرض گیاه، وزن ­تر و خشک بخش­های هرس‌شده، طول میانگره، میزان پرولین، سبزینۀ (کلروفیل)a، سبزینۀb و سبزینۀ کل بود. نتایج نشان دادند کندکننده­های رشد سبب کاهش رشد طولی و عرضی، طول میانگره‌ها، وزن تر و خشک بخش­های هرس‌شدۀ­ گیاه و افزایش میزان پرولین, سبزینۀ a، b و کل نسبت به تیمار شاهد ­شد.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of Paclobutrazol and Trinexapac-ethyl on morphological and physiological characteristics of Rosmari (Rosmarinus officinalis) and Thuja (Thuja orientalis “Morgan”) as two hedging plants

نویسندگان [English]

  • Najmeh Zamani 1
  • Nematollah Etemadi 2
  • Abdolrahman Mohammadkhani 3
1 Former M.Sc. Student, Faculty of Agriculture-Islamic Azad University Isfahan (Khorasgan Branch), Iran
2 Associate Professor, Department of Horticultural Science, Faculty of Agriculture, Isfahan University of Technology, Iran
3 Associate Professor, Department of Horticultural Science, Faculty of Agriculture, Shahrekord University, Iran
چکیده [English]

In recent years application of plant growth regulators especially growth retardants, has been significantly increased. Trizols (paclobutrzol and trinexapac-ethyl) as the most effective and least harmful growth retardants, induce more dwarf and denser cover plants with both darker and thicker leaves.  Therefore, an experiment based on completely randomized block design with 16 treatments and 3 replicates, was conducted to investigate the effect of paclobutrzol and trinexapac-ethyl application on morphological and physiological characteristics of rosemari and thuja “Morgan” as two hedge plants. Immediately after pruning, foliar spray was applied on each plant with 1000 and 4000 mg/l of paclobutrzol or 1000 mg/l of trinexapac-ethyl. Distilled water was used as control. Measured traits were included plant height and width, wet and dry weight of pruned parts, internode elongation, proline content, chlorophyll a, chlorophyll b and total chlorophyll content. Results indicated that growth retardants decreased plant height and width, wet and dry weight of pruned parts and internode elongation, while they increased proline content, chlorophyll a, chlorophyll b and total chlorophyll content as compared to the control plants.

کلیدواژه‌ها [English]

  • hedgeing plant
  • Paclobutrazol
  • trinexapac-ethyl
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