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بررسی تنش شوری و خشکی ناشی از کلرید سدیم و پلی اتیلن گلایکول بر خصوصیات جوانه زنی و رشد گیاهچه ی علف هرز خردل وحشی (arvensis Sinapis | ||
| علوم و فناوری بذر ایران | ||
| مقاله 9، دوره 4، شماره 1 - شماره پیاپی 7، فروردین 1394، صفحه 97-108 اصل مقاله (685.87 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| نویسندگان | ||
| امید لطفی فر* 1؛ ایرج اله دادی2؛ اسکندر زند3؛ غلام عباس اکبری4؛ سمانه متقی5 | ||
| 1استادیار گروه علوم کشاورزی، دانشگاه پیام نور، تهران، ایران | ||
| 2دانشیار پردیس ابوریحان- دانشگاه تهران | ||
| 3استاد پژوهشی موسسه تحقیقات گیاه پزشکی کشور | ||
| 4دانشیار پردیس ابوریحان- دانشگاه تهران. | ||
| 5استادیار گروه علوم کشاورزی، دانشگاه پیام نور، تهران، ایران. | ||
| چکیده | ||
| به منظور بررسی اثر تنشهای خشکی و شوری بر خصوصیات مرتبط با جوانه زنی و رشد گیاهچه توده علف هرز خردل وحشی جمع آوری شده از مزارع گندم آبی سه آزمون جداگانه در قالب طرح کاملاً تصادفی در چهار تکرار در موسسه تحقیقات گیاه پزشکی کشور انجام شد. سطوح مختلف تنش خشکی و شوری شامل پتانسیل های صفر (شاهد)، 2 ،-4 ،-6 ،-8 - و 10 -بار بود که به منظور ایجاد آنها به ترتیب از دو ماده پلیاتیلن گلایکول (PEG (و کلرید سدیم (NaCl (استفاده شد.درصد و سرعت جوانه زنی، طول گیاهچه، طول ساقه چه، طول ریشه چه و شاخص بنیه گیاهچه صفات اندازهگیری شده در این آزمایش بود.نتایج حاکی از تأثیرمنفی و معنیدار تنشهای مذکور بر روی کلیه صفات مورد بررسی بود که این تأثیرمنفی در تنش خشکی به صورت معنی دار بیشتر از تنش شوری بود که نشان دهنده مقاومت بالاترخردل وحشی به تنش شوری نسبت به خشکی میباشد. طول ساقه چه در برخورد با هر دو تنش بیشتر از طول ریشه چه تحت تأثیرقرار گرفت که حاکی از حساسیت بالاتر این صفت میباشد. بر اساس مدل برازش داده شده X50یا پتانسیلی که سبب کاهش 50 درصدی جوانه زنی نهایی و سرعت جوانه زنی خردل گردید در تنش شوری به ترتیب 33/7 و 03/5 بوده که به صورت معنی دار بالاتر از X50 مربوط به تنش خشکی (به ترتیب 47/4 و 90/2 بار) بود. | ||
| کلیدواژه‌ها | ||
| تنش؛ جوانه زنی؛ خردل وحشی؛ خشکی و شوری | ||
| عنوان مقاله [English] | ||
| Effects of Salinity and Drought Stresses Due to NaCl and Poly Ethylene Glycol on Germination Characteristics and Seedling Growth of Wild Mustard (Sinapis arvensis | ||
| چکیده [English] | ||
| This experiment was conducted to study the effect of salinity and drought stress on germination and growth characteristics of wild mustard seedlings collected from irrigated wheat fields on the base of a complete randomized design in Iranian Plant Protection Research Institute. Different levels of salinity and drought stress included of 0 (control), -2, -4, -6, -8 and -10 bar were created by NaCl and poly-ethylene-glycol (PEG), respectively. Measured criteria included of final germination percentage, germination speed, seedling length, plumule length, radicle length and seedling vigor index. According to the results, mentioned stresses had negative significant effect on germination rate and percentage, length of plumule, radicle and seedling and seedling vigor index. More significant effect in drought stress than salinity stress showed higher resistance of wild mustard in salinity stress rather than drought stress. Both salinity and drought stress affected length of plumule more than length of radical. It means that length of plumule is more sensitive to mentioned stresses. According to fitted model, X50 (the potential caused to 50% reduction of final germination and germination rate of wild mustard) related to salinity stress (7.33 and 5.03, respectively) was significantly higher than X50 related to drought stress (4.47 and 2.90, respectively). | ||
| کلیدواژه‌ها [English] | ||
| Drought Stress, germination, Salinity stress, Wild mustard | ||
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