اثر کاربرد نانو کود پتاسیم روی گیاه مادری بر مولفه‌های جوانه‌زنی بذر و رشد اولیه گیاهچه کینوا (Chenopodium quinoa Willd) تحت تنش آبی
الموضوعات :
محمد میرطیبی
1
,
امین بستانی
2
,
مرجان دیانت
3
,
امیر ازادی
4
1 - دانشجوی دکتری، دانشکده کشاورزی و صنایع غذایی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات، تهران، ایران
2 - دانشیار دانشگاه شاهد، تهران، ایران
3 - استادیاردانشکده کشاورزی و صنایع غذایی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات، تهران، ایران
4 - استادیار دانشگاه ازاد اسلامی یادگار امام شهر ری، ایران.
الکلمات المفتاحية: سرعت جوانه‌زنی, نانو کود پتاسیم, شاخص وزنی بنیه گیاهچه,
ملخص المقالة :
به منظور بررسی اثر تنش خشکی و پیش تیمار با نانو کود پتاسیم بر مولفه‌های جوانه‌زنی بذر کینوا (Chenopodium quinoa Willd) آزمایشی با دو فاکتور تنش خشکی در چهار سطح (شاهد آب مقطر و 3/0-، 6/0- و 9/0- مگاپاسکال) با استفاده از پلی-اتیلن گلایکول و دو نوع بذر حاصل از آزمایش مزرعه‌ای (پیش تیمار شده) در قالب طرح کاملاً تصادفی با چهار تکرار در پتری-دیش اجرا گردید. بدین منظور از دو تیمار آزمایش مزرعه‌ای (1- برای بذور کرت مزرعه‌ای نانو کود پتاسیم دریافت کرده و 2- بذور مزرعه‌ای بدون دریافت نانو کود پتاسیم) نمونه‌ای بذر جمع‌آوری شد. نتایج نشان داد که با افزایش شدت تنش، از درصد جوانه‌زنی بطور معنی‌داری کاسته شد و از 0/91 درصد در تیمار شاهد به 1/77 درصد در شرایط تنش شدید رسید. با افزایش شدت تنش، از ارزش جوانه‌زنی نیز به‌طور معنی‌داری کاسته شد و از 1184در تیمار شاهد به 784 در شرایط تنش شدید رسید. شاخص طولی بنیه گیاهچه نیز از 1411 در تیمار شاهد به 1032 در شرایط تنش شدید رسید. شاخص طولی بنیه گیاهچه در بذر تیمار شده (1204) نسبت به بذر تیمار نشده (1175) برتری معنی‌دار داشت. تفاوت معنی‌داری بین متوسط جوانه‌زنی روزانه بذر تیمار شده (6/11 روز بر بذر) با بذر تیمار نشده (5/10 روز بر بذر) وجود داشت. به این ترتیب پیش تیمار بذر با نانوکود پتاسیم مولفه‌های جوانه‌زنی بذر کینوا و رشد اولیه گیاهچه آن را بهبود بخشید.
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