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بررسی پیری تسریع شده بر صفات کمی و کیفی علفهای هرز پنیرک (Malva neglecta Wallr.)، خرفه (Portulaca oleracea L.) و تاجخروس (Amaranthus retroflexus L.) | ||
علوم و تحقیقات بذر ایران | ||
مقاله 2، دوره 7، شماره 4، دی 1399، صفحه 405-416 اصل مقاله (1.35 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22124/jms.2020.4589 | ||
نویسندگان | ||
زینب شرفی1؛ سید علی محمد مدرس ثانوی* 2؛ علی حیدرزاده3 | ||
1فارغالتحصیل کارشناسی ارشد زراعت، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران، ایران | ||
2استاد، گروه زراعت، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران، ایران | ||
3دانشجوی دکتری زراعت، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران، ایران | ||
چکیده | ||
بهمنظـور بررسـی تـأثیر سطوح پیری تسریعشده بر خصوصیات کمی و کیفی جوانهزنی علفهای هرز خرفه، تاجخروس و پنیرک مطالعهای بهصورت فاکتوریل در قالـب طـرح کاملاً تصادفی با چهار تکرار در آزمایشگاه تحقیقاتی دانشکده کشاورزی دانشگاه تربیت مدرس در سال 1397 انجام شـد. سـطوح مختلـف پیری در پنج سطح (صفر، 24، 48، 72 و 96 ساعت قراردادن بذرها در محیطی با رطوبت نسبی 100 درصد و دمای 45 درجه سلسیوس) بهعنوان عامل اول و سه گونههای علف هرز (پنیرک (Malva neglecta Wallr.)، خرفه (Portulaca oleracea L.) و تاجخروس (Amaranthus retroflexus L.)) بهعنوان عامل دوم در نظر گرفته شدند. نتـایج نـشان داد که تمام صفات مورد مطالعه تحت تأثیر اثرات متقابل فاکتورهای مورد بررسی قرار گرفتند. در شرایط مطلوب (عدم اعمال پیری تسریعشده) خرفه و تاجخروس بیشترین درصد جوانهزنی و قدرت سبزشدن گیاهچه را داشتند، ولی نتایج در مورد فعالیت آنزیمهای آنتی اکسیدانت و غلظت پروتئین در سه گونه علف هرز متفاوت بود بهنحویکه بیشترین میزان فعالیت آنزیم کاتالاز در علفهای هرز پنیرک و تاجخروس تحت تیمار 24 ساعت زوال بذر و در علف هرز خرفه تحت تیمار 72 و 96 ساعت زوال بهدست آمد. در نهایت نتایج حاصل از این مطالعه نشان داد که کیفیت بذر هر سه گونه علف هرز تحت شرایط زوال کاهش مییابد. | ||
کلیدواژهها | ||
آنزیمهای آنتیاکسیدانت؛ پیری تسریعشده؛ جوانهزنی؛ قدرت سبزشدن گیاهچه؛ هدایت الکتریکی | ||
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