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پیش تیمار بذر به عنوان راهکاری برای بهبود سبز شدن چمن فتان بلند (Schreb. Festuca arundinacea) بومی گز برخوار در شرایط تنش خشکی | ||
| علوم و فناوری بذر ایران | ||
| مقاله 21، دوره 7، شماره 2 - شماره پیاپی 14، بهمن 1397، صفحه 289-301 اصل مقاله (991.68 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22034/ijsst.2019.110741.1095 | ||
| نویسندگان | ||
| فاطمه نعمت الهی1؛ علی تهرانی فر* 2؛ سید حسین نعمتی2؛ فاطمه کاظمی3؛ غلامعلی گزانچیان4 | ||
| 1گروه علوم باغبانی و فضای سبز دانشکده کشاورزی دانشگاه فردوسی مشهد - ایران | ||
| 2گروه علوم باغبانی و مهندسی فضای سبز دانشکده کشاورزی، دانشگاه فردوسی مشهد. ایران | ||
| 3گروه علوم باغبانی و مهندسی فضای سبز دانشکده کشاورزی، دانشگاه فردوسی مشهد. | ||
| 4بخش تحقیقات جنگل ها و مراتع، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان خراسان رضوی، سازمان تحقیقات، آموزش و ترویج کشاورزی، مشهد، ایران. | ||
| چکیده | ||
| به دلیل استفاده از بذور چمن وارداتی و به طبع تحمیل هزینه های سنگین خرید بذر و سازگاری کم آنها با شرایط اقلیمی کشور، توجه به اکوتیپهای چمن بومی ایران حائز اهمیت است. یکی از دلایل توجه اندک به بذور بومی، عدم سبز شدن سریع و یکنواخت آنها خصوصا در شرایط تنش خشکی است. هدف پژوهش، بررسی پیشتیمار اسید سالیسیلیک (1/0، 5/0، 1 و 5/1 mM)، کلرید سدیم (15، 30 و 45ds/m ) و آب مقطر و مقایسه آن با شاهد (بدون پیش تیمار) روی بذر چمن فتان بلند بومی منطقه گزبرخوار اصفهان در شرایط تنش خشکی شدید، متوسط و خفیف بود. بدین منظور صفات درصد سبز شدن، میانگین زمان سبز شدن، ارتفاع بخش هوایی، وزن خشک گیاه، محتوای آب نسبی برگ، نشت الکترولیت، میزان کلروفیل کل و میزان کاروتنوئید گیاهچهها اندازهگیری شد. نتایج نشان داد پیش تیمار با اسید سالیسیلیک 5/0 mM در شرایط تنش متوسط سبب افزایش معنیدار میزان سبز شدن بذور (10/96%) و در شرایط تنش خفیف سبب کاهش زمان سبز شدن گیاهچهها (70/3 روز) شد. اگر چه گیاهان تیمار ذکر شده در سایر صفات تفاوت معنیداری با تیمار شاهد نداشتند، نظر به اهمیت صفات میزان و زمان سبز شدن برای بذور بومی اصلاح نشده، میتوان این پیش تیمار را برای بهبود صفات سبز شدن بذور فتان بلند گزبرخوار توصیه نمود. | ||
| کلیدواژه‌ها | ||
| تنش آبی؛ خیساندن بذر؛ فستوکای پابلند؛ گراس بومی | ||
| عنوان مقاله [English] | ||
| Seed priming as a strategy for improving seedling emergence stage of a native tall fescue (Festuca arundinacea Schreb. ecotype Gaz Borkhar) under drought stress conditions | ||
| نویسندگان [English] | ||
| Fatemeh Nematollahi1؛ Ali Tehranifar2؛ Seyyed Hossein Nemati2؛ fatemeh kazemi3؛ Gholamali Gazanchian4 | ||
| 1Department of Horticultural Science and landscape, Ferdowsi University of Mashhad, Iran | ||
| 2Department of Horticultural Science and landscape, Ferdowsi University of Mashhad, Iran. | ||
| 3Department of Horticulture and landscape, Ferdowsi University of Mashhad, Iran | ||
| 4Associate Professor at Rangland and Forest Research Department-Khorasan-e-Razavi Agricutural and Natural Resources Research and Education Center- Agricultural Research, Education and Extention Organization | ||
| چکیده [English] | ||
| Due to high expenses of imported lawn seeds and low adaptability of them to climatic conditions of Iran, paying attention to native ecotypes of turf grasses is important. One of the reasons for paying less attention to the seeds of native turf grasses is their lack of rapid and uniform germination rate especially under drought stress conditions. The aim of this study was to investigate the effect of seed priming using salicylic acid (1/0, 5/0, 1 and 5/1 mM), sodium chloride (15, 30 and 45ds /m) and distilled water compared to the control treatment on tall fescue native to GazBorkhar (Isfahan province) under mild, moderate and severe drought stress conditions. For this purpose, seed emergence, mean emergence time, shoot height, plant biomass, relative water content, electrolyte leakage, total chlorophyll content and carotenoid content were measured. The results showed seed priming using salicylic acid 0.5 mM significantly increased the seed emergence rate (96.10%) in moderate stress conditions and reduced the time to emerge (3.70 day) in mild stress conditions. Although the plants treated with 0.5 mM salicylic acid did not show significant differences with the control treatment in other characteristics, considering the significance of the amounts and rates of seed emergence in native turf grasses, this prime treatment can be recommended to improve emergence percentage of the seeds of Festuca arundinacea ecotype Gazborkhar. | ||
| کلیدواژه‌ها [English] | ||
| Native turf grass, Seed soaking, Tall fescue, Water stress | ||
| مراجع | ||
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