تأثیر مثبت کاریکین بر جوانه زنی بذر سه گیاه دارویی تحت تنش خشکی

نوع مقاله : مقاله کامل

نویسندگان

1 دانشگاه زابل

2 بخش علوم باغبانی، دانشکده کشاورزی، دانشگاه شیراز

3 دانشگاه شیراز

چکیده

چکیده- جوانه زنی نامناسب بذر گیاهان دارویی در مناطق نیمه خشک و خشک یک چالش مهم به حساب می آید. مشخص شده است که یک گروه جدید از تنظیم کننده های رشد گیاهی، معروف به کاریکین ها، برای بهبود جوانه زنی بذر برخی گیاهان مفید هستند. در این راستا تأثیر کاریکین بر جوانه زنی و قدرت دانهال سه گیاه دارویی تحت تنش خشکی مورد بررسی قرار گرفت. بذرهای زنیان (Trachyspermum copticum (L.) Link)، رازیانه (Foeniculum vulgare Miller) و زیره سبز (Cuminum cyminum L.)  تحت تیمارهای خشکی (1-، 5/1-، 2- و 5/2-  MPa  از (PEG 6000 با یا بدون استفاده از کاریکین سنتزی GR24 (10µM) کشت شدند. اگرچه با افزایش فشار اسمزی مشخصات جوانه زنی بذر به شدت کاهش یافت، اما کاریکین بطور معنی داری فاکتورهای جوانه زنی سه گیاه دارویی را افزایش داد. کاربرد کاریکین در تمام شرایط خشکی بطور  معنی داری درصد جوانه زنی، سرعت جوانه زنی، شاخص جوانه زنی، قدرت دانهال، طول شاخساره و طول ریشه چه تمام دانهال های گیاهان دارویی را افزایش داد. زنیان (T. copticum) در مقایسه با دیگر گونه های دارویی تحمل به خشکی بیشتری نشان داد.

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