اثر تنش خشکی و محلول پاشی اسیدسالیسیلیک بر برخی صفات فیزیولوژیک و مورفولوژیک‎ ‎پنیرباد‎ ‎‏(‏Withania coagulans Dunal.‎‏)‏

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش آموخته کارشناسی ارشد، گروه کشاورزی، واحد شیروان، دانشگاه ‌آزاد ‌اسلامی، شیروان، ایران

2 دانشیار، بخش تحقیقات علوم زراعی و باغی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی خراسان رضوی، سازمان ‏تحقیقات آموزش و ترویج کشاورزی، مشهد، ایران

3 استادیار، گروه کشاورزی، واحد شیروان، دانشگاه ‌آزاد ‌اسلامی، شیروان، ایران

چکیده

گیاه پنیرباد یکی از گونه­های گیاهی با ارزش اقتصادی بالا است وکاربرد آن در فضای سبز، صنایع دارو‌‌سازی، تثبیت شن‌های روان درمناطق کویری می­باشد. با هدف بررسی اثر تنش خشکی و محلول­پاشی اسیدسالیسیلیک بر خصوصیات مورفولوژیک و فیزیولوژیک پنیرباد در مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی خراسان رضوی در شرایط گلخانه­ای انجام شد. از آزمایش فاکتوریل در دو عامل در قالب طرح کاملا تصادفی با سه تکرار استفاده شد. عامل اول محلول­پاشی اسیدسالیسیلیک در چهار سطح (صفر، 1، 5/1 و 2 میلی­مولار) و عامل دوم تنش خشکی در چهار سطح (100، 80، 60 و 40 درصد ظرفیت زراعی) بودند. نتایج نشان داد اثر تنش خشکی و اسیدسالیسیلیک بر صفات فیزیولوژیک (میزان پرولین، درصد نشت یونی، درجه سبزینگی و میزان فلورسانس کلروفیل) و صفات مورفولوژیک (ارتفاع بوته و سطح برگ) در سطح احتمال یک درصد معنی­دار بود. مقایسه میانگین­ها نشان داد بیشترین محتوای پرولین برگ (99/3 میکرو­مول بر گرم وزن­تر) در تیمار اسیدسالیسیلیک 5/1 میلی­مولار و تنش خشکی60 درصد ظرفیت زراعی به ­دست آمد. بیشترین درصد نشت یونی در تیمار شاهد و تنش خشکی40 درصد ظرفیت زراعی به دست آمد. نتایج این تحقیق نشان داد پنیرباد متحمل به خشکی بوده و اعمال تنش تا 60 درصد ظرفیت زراعی را می­تواند تحمل نماید. با توجه به ارزش اقتصادی این گیاه کاربرد اسیدسالیسیلیک نیز می­تواند میزان تحمل به خشکی را افزایش دهد.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of drought stress and foliar application of salicylic acid on some morphological ‎and physiologicalcharacters of withania (Withania coagulans Dunal.)‎

نویسندگان [English]

  • Sabike Ghrecholo 1
  • fereshte nurollahi 1
  • Ebrahim Ganji Moghadam 2
  • Maryam Tatari 3
1 M.Sc. Graduate, Department of Agriculture, Shirvan Branch, Islamic Azad University, Shirvan, Iran
2 Associate Professor, Crop and Horticultural Science Research Department, Khorasan Razavi Agricultural and Natural Resources Research ‎and Education Center (AREEO), Mashhad, Iran
3 Assistant Professor, Department of Agriculture, Shirvan Branch, Islamic Azad University, Shirvan, Iran
چکیده [English]

Withania is one of the most important medicinal species from economical point of view and its application in pharmaceutical industries and stabilization of sand in desert areas. This study was conducted to evaluate the effect of drought stress and foliar application of salicylic acid on some physiological and morphological characters of Withania at Khorasan Razavi Agricultural and Natural Resources Research and Education Center under green house conditions. A two factorial experiment was laid out in completely randomized design with three replications. The first factor, four levels of foliar application of salicylic acid (control, 1, 1.5, 2 mM) and the second factor, four drought levels (100, 80, 60 and 40 percent of field capacity). The results showed that drought stress and salicylic acid had significant effects (P≤1 percent) on physiological (proline content, ion leakage percent, SPAD, chlorophyll fluorescence) and morphological (shoot height and leave sourface) traits. Mean comparisons showed that the highest value of proline (3.99 µmol g-1 FW) was obtained in 1.5 mM salicylic acid and drought stress 60 percent field capacity. The highest value of ion leakage percent was obtained in the control treatment of salicylic acid and drought stress 40 percent of field capacity. According our results, revealed that the withania was tolerance drought stress and can be tolerance to 60 percent of field capacity. at all levels of drought stress. Since withania plant is valuable, salicylic acid can be increase the tolerance of this plant to drought.

کلیدواژه‌ها [English]

  • Chlorophyll fluorescence
  • ionic leakage percent
  • proline
  • shoot dry weight
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