نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشآموخته کارشناسی ارشد گیاهان زینتی، گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه لرستان، لرستان، ایران
2 استاد فیزیولوژی گیاهان زینتی، گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه لرستان، لرستان، ایران
3 دکتری علوم باغبانی- گیاهان زینتی، گروه علوم باغبانی، دانشکده کشاورزی، دانشگاه لرستان، لرستان، ایران
چکیده
هدف از مطالعه حاضر ارزیابی تاثیر محلولپاشی نانوذرات اکسید روی بر ویژگیهای مورفولوژیکی و فیزیوبیوشیمیایی گیاه زینتی- دارویی پروانش، تحت تنش کمآبیاری بود. آزمایش بهصورت فاکتوریل در قالب طرح کاملا تصادفی با چهار تکرار انجام شد. فاکتور اول، شامل تنش کمآبیاری در سه سطح 80، 50 و 20 درصد آب قابل دسترس در خاک و فاکتور دوم، شامل محلولپاشی نانوذرات دیاکسیدروی در غلظتهای صفر، 50، 100 و 200 میکرومولار بود. در ادامه شاخصهای موفوفیزیولوژیکی و بیوشیمیایی اندازهگیری شد. نتایج نشان داد، تنش کمآبیاری، باعث کاهش معنیداری در ارتفاع گیاه، سطح برگ، محتوای نسبی آب برگ، غلظت رنگدانههای فتوسنتزی، وزن تر و خشک گیاه و تبادلات گازی و افزایش در نشت الکترولیت، غلظت مالوندیآلدهید، پرولین و فعالیت آنزیمهای آنتیاکسیدانی شد. کاربرد نانوذرات اکسید روی، باعث افزایش فعالیت آنزیمهای آنتیاکسیدانی، محتوای نسبی آب برگ، غلظت رنگدانههای فتوسنتزی و همچنین تبادلات گازی شد و در نتیجه مقاومت به تنش خشکی را افزایش داد.
کلیدواژهها
موضوعات
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