اثر محلول پاشی پرولین برکاهش اثرات ناشی از تنش کم آبی در بابونه آلمانی

محورهای موضوعی :

حکیمه درویژه ¹ (گروه زراعت و اصلاح نباتات، دانشکده علوم کشاورزی، دانشگاه گیلان، رشت، ایران)
محسن زواره ² (گروه زراعت و اصلاح نباتات، دانشکده علوم کشاورزی، دانشگاه گیلان، رشت، ایران)

تاریخ دریافت : 1396/12/14 تاریخ پذیرش : 1397/03/19 تاریخ انتشار : 1397/03/01

کلید واژه:  تنش خشکی,  تنظیم کننده رشد گیاهی,  آنزیم آنتی اکسیدانی,  پتانسیل آب,  تنظیم اسمزی,

چکیده مقاله :

راه کار های مختلفی برای کاهش آسیب های ایجاد شده طی تنش کم آبی و بهبود تحمل گیاه به آن وجود دارد. در این پژوهش تأثیر محلول‌پاشی پرولین بر کاهش اثرات تنش کم‌آبی و بهبود شاخص‌های کمی و کیفی بابونه آلمانی بررسی شد. آزمایش به صورت فاکتوریل در قالب طرح کاملاً تصادفی با سه تکرار در دانشگاه گیلان انجام و تیمارهای آزمایش شامل پرولین با غلظت های 0، 50 و 100 میلی گرم بر لیتر و کم آبی در چهار سطح 0، 25، 50 و 75 درصد تخلیه از حد ظرفیت زراعی در مرحله ساقه روی بود. در اثر کم آّبی غلظت پرولین و کاتالاز افزایش، ولی صفات مورفولوژیک کاهش یافت. کاربرد پرولین در شرایط کم آّبی بر همه ویژگی های اندازه گیری شده تأثیر معنی دار داشت. براساس نتایج این آزمایش محلول پاشی گیاه با غلظت 100 میلی گرم بر لیتر پرولین موجب بهبود رشد و تعدیل وضعیت گیاه در برابر کم آبی شد و از این رو استفاده از غلظت فوق برای دستیابی به عملکرد مطلوب در بابونه در شرایط کم آبی توصیه می شود.

چکیده انگلیسی:

Water deficit stress is one of the most important abiotic stresses that seriously leads to plant production decrement. Several strategies have been proposed to alleviate of cellular damage caused by water deficit stress and also to improve plant tolerance against water deficit .The study was conducted as factorial experiment based on completely randomized design with three replications in Guilan University. Treatments included proline spraying in two concentrations of 50 and 100 mg/L, and irrigation after 0, 25, 50 and 75% depletion of FC level in stem elongation stage. Water deficit resulted in increase of proline content and catalase but decrease of morphological traits. Proline application had significant impact on all traits under water stress conditions. The foliar application of 100 mg/L proline resulted to improvement of growth and alleviate of water stress damages. On the whole, application of 100 mg/L proline would be recommendable to reach the maximum yield of German chamomile in various water deficit circumstances.

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