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شکست خواب فیزیکی و ارزیابی عوامل محیطی بر جوانه‌زنی بذر انگل سس (Cuscuta Campestris) | ||
| علوم و فناوری بذر ایران | ||
| دوره 10، شماره 2 - شماره پیاپی 22، تیر 1400، صفحه 1-13 اصل مقاله (368.67 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijsst.2020.341568.1324 | ||
| نویسندگان | ||
| احمد زارع* 1؛ زینب پور عامری2 | ||
| 1استادیار گروه مهندسی تولید و ژنتیک گیاهی. دانشگاه علوم کشاورزی و منابع طبیعی خوزستان | ||
| 2دانشجوی گیاه پزشکی | ||
| چکیده | ||
| به منظور شناخت خواب و جوانه‌زنی بذر انگل سس به عوامل مختلف (اسید سولفوریک (خواب فیزیکی)، نور، دما، شوری و خشکی) به صورت چهار آزمایش جداگانه در سال 1397 در دانشگاه علوم کشاورزی و منابع طبیعی خوزستان انجام گرفت. تیمارهای آزمایشی به ترتیب شامل مدت غوطه‌ور کردن بذرها در اسید سولفوریک 96% (صفر، 10، 20، 30، 60، 90 و 120 دقیقه)، جوانه‌زنی در دماهای مختلف (پنج، 10، 15، 20، 25، 30، 35، 40 و 45 سلسیوس)، شرایط نور (روشنایی/تاریکی و تاریکی)، سطوح تنش شوری (صفر، 50، 100، 150، 200، 250، 300، 350 و 400 میلی‌مولار) و تنش خشکی (صفر، 2/0-، 4/0-، 6/0-، 8/0-،1/0- و 2/1- مگاپاسکال) بود. غوطه‌وری بذر به مدت 30 دقیقه منجر به افزایش جوانه‌زنی (%100) گردید و با افزایش مدت زمان به 120 دقیقه جوانه‌زنی به 60 % کاهش یافت. درصد جوانه‌زنی در دماهای 10 (53%) ، 20 ( 88%)، 25(%100)، 30 (%100)، 35 (%100) و 40 درجه سلسیوس (%42) بود. جوانه‌زنی انگل سس وابسته به نور نبود. کاهش 50 % صفات درصد جوانه‌زنی، شاخص جوانه‌زنی و سرعت جوانه‌زنی در89/154، 71/139 و 11/119 میلی‌مولار شوری پیش‌بینی گردید. همچنین پاسخ بذر سس به تنش خشکی نشان داد کاهش 50 % صفات درصد جوانه‌زنی، شاخص و سرعت جوانه‌زنی بر اساس معادله لجستیک در سطوح 57/0، 43/0، 52/0 مگاپاسکال خشکی پیش‌بینی گردید. | ||
| کلیدواژه‌ها | ||
| اسید سولفوریک؛ درصد جوانه‌زنی؛ سرعت جوانه‌زنی؛ شوری؛ معادله لجستیک | ||
| عنوان مقاله [English] | ||
| Breaking of physical dormancy and evaluation of environmental factors on seed germination of field dodder parasite (Cuscuta Campestris) | ||
| نویسندگان [English] | ||
| ahmad zare1؛ Zeinab Porameri2 | ||
| 1Assistant Professor of Plant Production and Genetics Department, Faculty of Agriculture, Agricultural Sciences and Natural Resources University of Khuzestan. Bavi, Mollasani, Iran | ||
| 2-B. Sc. Student of Plant Protection Department, Faculty of Agriculture, Agricultural Sciences and Natural Resources University of Khuzestan | ||
| چکیده [English] | ||
| In order to knowledge the dormancy and seed germination of field dodder in response to environmental factors (sulfuric acid (physical dormancy), light, temperature, salinity and drought stress) four separate experiments were conducted at agricultural scientists and natural recourses university of Khuzestan. Treatments of sulfuric acid (96%) immersion (0, 10, 20, 30, 60, 90 and 120 m exposure to sulfuric acid), temperature (5, 10, 15, 20, 25, 30, 35, 40, 45°C). Light (light/dark and darkness), salinity (0, 50, 100, 150, 200, 250, 300, 350, 400 and 400 mM) and drought stress (0, -0.2,-0.4, -0.6, -0.8, -1 and -1.2 MPa) were considered. Seed immersion for 30 m increased germination up to 100% while by increasing of seed immersion in sulfuric acid to 120 minutes, germination decreased to 60%. Seed germination were at 10°C (53%), 20 (88%), 25 (100%), 30 (100%), 35 (100%) and 40°C (42%). Germination of field dodder wasn’t dependent on light. The salinity required to 50% inhibition for traits germination percentage, germination index and germination rate were predicted 154.89, 139.71 and 119.11mM respectively. From the results of drought stress indicated that for 50% inhibition of germination percentage, germination index and germination rate (logistic equation) were predicted -0.57, -0.43 and 0.52 MPa respectively. | ||
| کلیدواژه‌ها [English] | ||
| Sulfuric acid, germination percentage, germination rate, light | ||
| مراجع | ||
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