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تاثیر عوامل مختلف محیطی بر ویژگی های جوانهزنی بذر علف هرز مهاجم گل گندم زرد (Centaurea solstitialis) | ||
| علوم و فناوری بذر ایران | ||
| دوره 9، شماره 4 - شماره پیاپی 20، آذر 1399، صفحه 111-122 اصل مقاله (1022.76 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijsst.2020.127938.1295 | ||
| نویسندگان | ||
| احمد زارع* 1؛ فاطمه دریس2؛ زهرا کریمی3 | ||
| 1استادیار گروه مهندسی تولید و ژنتیک گیاهی. دانشگاه علوم کشاورزی و منابع طبیعی خوزستان | ||
| 2دانشجو گروه مهندسی تولید و ژنتیک گیاهی | ||
| 32- دانشجوی مهندسی تولید و ژنتیک گیاهی، دانشکده کشاورزی، دانشگاه علوم کشاورزی و منابع طبیعی خوزستان | ||
| چکیده | ||
| به منظور بررسی پاسخ علفهرز مهاجم گلگندم زرد (Centaurea solstitialis) به عوامل محیطی (دما، خشکی و شوری)، سه آزمایش جداگانه (طرح کاملاً تصادفی) در سال 1398 در دانشگاه علوم کشاورزی و منابع طبیعی خوزستان در 6 تکرار انجام گرفت. تیمارهای دما شامل (5، 10، 15، 20، 25، 30، 35 و 40 درجه سلسیوس)، تنش خشکی شامل (0، 0/2-، 0/4-، 0/6-، 0/8-،1- و 1/2- مگاپاسکال) و تنش شوری شامل (0، 50، 100، 150، 200، 250، 300 و 350 میلیمولار) بود. جوانهزنی در دمای 25 (%94)، 20(%93/33) و 30 درجه سلسیوس (%92) بود. کمترین جوانهزنی در دمای 35 (%22/66) و در دمای 40 درجه سلسیوس جوانهزنی کاملاً متوقف گردید. بر اساس برآورد معادله لجستیک سه پارامتره(x50)،کاهش% 50 جوانهزنی و سرعت جوانهزنی به ترتیب در سطح تنش خشکی 0/70- و 0/46- مگاپاسکال به دست آمد. شوری مورد نیاز برای کاهش% 50 صفات درصد جوانهزنی (182/35میلیمولار) و سرعت جوانهزنی (130/57 میلیمولار) بود. شناخت بیولوژی بذر علفهرز گلگندم زرد میتواند در مدیریت سبزشدن آن در مزرعه کمک نماید. | ||
| کلیدواژهها | ||
| سرعت جوانهزنی؛ معادله لجستیک؛ شوری؛ دما | ||
| عنوان مقاله [English] | ||
| Influence of environmental factors on seed germination characteristics of invasive weed yellow starthistle (Centaurea solstitialis) | ||
| نویسندگان [English] | ||
| ahmad zare1؛ fatemeh deris2؛ zahra karimi3 | ||
| 1Assistant Professor of Plant Production and Genetics Department, Faculty of Agriculture, Agricultural Sciences and Natural Resources University of Khuzestan. Bavi, Mollasani, Iran | ||
| 2Student of Plant Production and Genetics, Agricultural Sciences and Natural Resources University of Khuzestan. Bavi, Mollasani, Iran | ||
| 3Student of Plant Production and Genetics, Agricultural Sciences and Natural Resources University of Khuzestan. Bavi, Mollasani, Iran | ||
| چکیده [English] | ||
| In order to response of yellow starthistle (Centaurea solstitialis) to environmental factors (temperature, drought and salinity), were conducted three separate experiments in 6 replicates in 2019 at Agricultural Sciences and Natural Resources University of Khuzestan. Temperature treatments included (5, 10, 15, 20, 25, 30, 35 and 40 °C), drought stress (0, -0.2, -0.4, -0.6, -0.8, -1 and -1.2 MPa) and salinity stress (0, 50, 100, 150, 200, 250, 300 and 350 mM), respectively. The results of Temperature indicated that the highest germination percentage was at 25(94%), 20(93/33%) and 30 °C (92%). The lowest germination percentage was at 35 °C (22.66) and at 40 °C germination completely was inhibited. Based on the estimation of the logistic equation three parameters (x50), germination percentage and germination rate were reduced by 50% at -0.70 and -0.46 -MPa levels of drought stress, respectively. The salinity required to reduce by 50% were in germination percentage (182.35mM and germination rate (130.57mM). the knowledge of seed biology of yellow starthistle can help to manage emergence in the future. | ||
| کلیدواژهها [English] | ||
| Germination rate, Logistic equation, Salinity, Temperature | ||
| مراجع | ||
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