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پاسخ خصوصیات جوانه زنی و رشد گیاهچه سه رقم پنبه به تنش های خشکی و شوری | ||
| علوم و فناوری بذر ایران | ||
| دوره 15، شماره 1 - شماره پیاپی 41، اسفند 1404، صفحه 21-35 اصل مقاله (808.89 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijsst.2024.364549.1513 | ||
| نویسندگان | ||
| سمانه السادات سید حیدریان1؛ رضا توکل افشاری* 2؛ ابراهیم ایزدی دربندی2 | ||
| 1دانش‌آموخته کارشناسی ارشد اگروتکنولوژی، گروه اگروتکنولوژی، دانشکده کشاورزی دانشگاه فردوسی مشهد، مشهد، ایران. | ||
| 2استاد، گروه اگروتکنولوژی، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران. | ||
| چکیده | ||
| شوری بالا و خشکی از مشکلات محیطی رایجی است که بر جوانه زنی بذر و رشد گیاه تأثیر می‌گذارد. شناسایی ارقام متحمل به شرایط تنش خشکی و شوری و استفاده از آنها در سیستم‌های زراعی یکی از کارهای بهبود تولید پنبه می‌باشد.به همین منظور 3 رقم پنبه در قالب طرح کاملا تصادفی و با استفاده از آزمایش فاکتوریل تحت شرایط بدون‌تنش و تنش با سه تکرار مورد ارزیابی قرار گرفتند.در هر دو آزمایش از 3 رقم پنبه(MAY344, BA440, VARAMIN)به عنوان فاکتور اول استفاده شد و فاکتور دوم در آزمایش اول تنش شوری و در آزمایش دوم تنش خشکی بود.سطوح تنش شوری صفر،180،120،60 میلی مولار با استفاده از نمک NaCl و در آزمایش دوم، سطوح تنش خشکی صفر،4/0، 8/0مگاپاسگال با استفاده از محلول پلی‌اتیلن‌گلایکول 6000 در نظرگرفته شدند.صفات مورد بررسی شامل درصد جوانه‌زنی،سرعت جوانه‌زنی،طول ریشه‌چه،طول ساقه‌چه ،وزن تر ریشه‌چه و ساقه‌چه و وزن خشک ریشه‌چه و ساقه‌چه بود.نتایج بررسی نشان داد که تفاوت معنی‌داری در سطح احتمال 1% و یا 5 % بین ارقام در هر دو تنش وجود دارد اما به طور کلی تنش خشکی بازدارندگی بیشتری را بر روی صفات اندازه‌گیری شده داشت.برای وزن خشک ریشه‌چه،رقم ورامین کمترین کاهش را نسبت به دو رقم دیگر داشت و در آخرین سطح تنش نسبت به شاهد برای تنش شوری 14%و در تنش خشکی 66%کاهش را ثبت نمود. نتایج این بررسی نشان داد که رقم ورامین در تمامی پارامترهای مورد بررسی در شرایط تنش خشکی و شوری عملکرد بهتری را نسبت به دو رقم دیگر دارد. | ||
| کلیدواژه‌ها | ||
| پنبه؛ شاخص جوانه‌زنی؛ مراحل اولیه رشد؛ تنش شوری؛ تنش خشکی | ||
| عنوان مقاله [English] | ||
| The response of germination characteristics and seedling growth of three cotton cultivars to drought and salinity stresses | ||
| نویسندگان [English] | ||
| Samaneh Sadat Seyed Heydarian1؛ Reza Tavakkol Afshari2؛ Ebrahim Izadi Darbandi2 | ||
| 1Professor, Department of Agrotechnology, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran. | ||
| 2FProfessor, Department of Agrotechnology, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran.erdowsi Univ. Mashhad | ||
| چکیده [English] | ||
| High salinity and drought are common environmental problems that affect seed germination and plant growth. Identifying cultivars tolerant to drought and salinity stress conditions and using them in agricultural systems is one of the tasks of improving cotton production. For this purpose,3 cotton cultivars in the form of a completely randomized design and using factorial testing under non-stressed and stressed conditions Three repetitions were evaluated. In both experiments,3 cotton cultivars(MAY344, BA440, VARAMIN)were used as the first factor, and the second factor was salt stress in the first experiment and drought stress in the second experiment. The levels of salinity stress were 0, 180 60, 120 ds/m using NaCl salt and in the second experiment, the drought stress levels were considered to be 0, 0.4, 0.8 MPa using polyethylene glycol 6000 solution. The studied properties include germination percentage, germination speed, root length, stem length, wet weight of root and stem, and dry weight of root and stem. The results of the study showed that there was a significant difference at the probability level of 1% or 5% between cultivars in each There are two stresses, but in general, drought stress had more inhibition on the measured traits.For root dry weight,Varamin number had the lowest decrease compared to the other two cultivars, and at the last level of stress compared to the control,for salinity stress 14 % and recorded a 66% reduction in drought stress. Varamin cultivar had better performance in all the investigated parameters under drought and salinity stress conditions. | ||
| کلیدواژه‌ها [English] | ||
| Cotton, Germination Index, Early stages of growth, Salinity stress, Drought stress | ||
| مراجع | ||
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