تاثیر اسپرمیدین روی القای تحمل به سرما در گیاهچه های خیار رقم ’سوپردامینوس‘

علوم باغبانی

مقاله 4، دوره 30، شماره 3، آذر 1395، صفحه 547-554   

نوع مقاله: مقالات پژوهشی

شناسه دیجیتال (DOI): 10.22067/jhorts4.v30i3.49095

نویسندگان

گلنار قاضیان تفریشی^{* 1}؛ حسین آرویی¹؛ مجید عزیزی¹؛ حمیدرضا خزاعی¹؛ سعید رضا وصال²

¹دانشگاه فردوسی مشهد

²دانشگاه اشترالیای غربی/دانشکاه فردوسی مشهد

چکیده

خیار یک گیاه فصل گرم و حساس نسبت به سرمازدگی می‌باشد و در صورت مواجهه با سرمای بهاره رشد آن به شدت کاهش یافته یا متوقف می شود. به منظور بررسی تاثیر مواد تنظیم کننده رشد (اسپرمیدین) بر ایجاد مقاومت به سرما در گیاهچه های خیار رقم سوپردامینوس، آزمایشی به صورت فاکتوریل در قالب طرح کاملا تصادفی با هشت تیمار و در سه تکرار انجام شد. تیمارها شامل: دو سطح دما (6 و 12 درجه سانتی گراد) و چهار سطح اسپرمیدین (0، 25/0، 5/0 و 75/0 میلی گرم در لیتر) بود. وزن خشک ریشه چه، نسبت وزن ریشه به اندام‌های هوایی و درصد کلروفیل برگ تحت اثر تنش سرما و کاربرد اسپرمیدین قرار گرفتند. اثرات متقابل کاربرد اسپرمیدین و تنش سرما بر طول ساقه‌چه، طول ریشه‌چه، وزن خشک اندام‌های هوایی و نشت الکترولیت برگ و ریشهمعنی دار بود (p

کلیدواژه‌ها

طول ساقه چه؛ محتوای کلروفیل؛ نشت الکترولیت؛ وزن خشک ریشه چه

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