گروه زراعت و اصلاح نباتات، دانشکده علوم کشاورزی، دانشگاه گیلان، رشت، ایران
چکیده
راه کارهای 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 غلظتهای 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 کمآبی شد و از این رو استفاده از غلظت فوق برای دستیابی به عملکرد مطلوب در بابونه در شرایط کمآبی توصیه می شود.
Effects of proline foliar application on alleviation of water deficit in German chamomile
نویسندگان [English]
Hakimeh Darvizheh؛ Mohsen Zavareh
Department of Agronomy and Plant Breeding, University of Guilan, Rasht, Iran
چکیده [English]
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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