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تاثیر پیشتیمار زیستی بذر بر شاخصهای جوانهزنی، رشدی و رنگیزه گیاه کتان (Linum usitatissimum L.) تحت تنش شوری | ||
| علوم و فناوری بذر ایران | ||
| مقاله 10، دوره 10، شماره 3 - شماره پیاپی 23، آبان 1400، صفحه 133-144 اصل مقاله (814.25 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijsst.2021.343191.1349 | ||
| نویسندگان | ||
| سید اسماعیل موسوی1؛ حشمت امیدی* 2 | ||
| 1دانشگاه شاهد | ||
| 2دانشیار گروه زراعت و اصلاح نباتات، دانشکده علوم کشاورزی و مرکز تحقیقات گیاهان دارویی دانشگاه شاهد تهران | ||
| چکیده | ||
| به منظور بررسی تأثیر پیشتیمار زیستی بر شاخصهای جوانهزنی، رشدی و رنگیزه گیاه کتان تحت تنش شوری، آزمایشی بهصورت فاکتوریل در قالب طرح پایهی کاملاً تصادفی در سه تکرار در سال 1397 در دانشکدهی کشاورزی دانشگاه شاهد اجرا گردید. تیمارهای آزمایشی شامل چهار سطح شوری (صفر (شاهد)، 5/2، 5 و 5/7 دسیزیمنس بر متر) و تیمارهای زیستی در چهار سطح (شاهد، باکتری، قارچ و برهمکنش قارچ و باکتری) بودند. اثر تیمار زیستی بر درصد جوانهزنی معنیدار بود و بالاترین درصد جوانهزنی (99 درصد) در تیمار قارچ حاصل شد. اثر شوری و تیمار زیستی بر میانگین مدت زمان جوانهزنی و ضریب جوانهزنی معنیدار بود. کمترین میزان مدت زمان جوانهزنی (79/3 روز) در تیمار تلفیق قارچ و باکتری حاصل شد که نشان از موثر بودن این تیمار نسبت به سایر تیمار زیستی میباشد. با افزایش سطح شوری میانگین مدت زمان جوانهزنی افزایش یافت. شوری باعث کاهش طول ریشهچه، ساقهچه و طول گیاهچه شد. میانگینهای طول ریشهچه در سطوح مختلف شوری تیمار زیستی قارچ نسبت به تیمارهای دیگر زیستی بالاترین مقدار را دارا بود. اثر متقابل شوری و تیمار زیستی بر کلروفیل a و کلروفیل کل معنیدار بود. با افزایش غلظت شوری، از میزان رنگیزههای گیاهی کاسته شد. بیشترین مقدار کلروفیل a (52/16 میکرو مول بر میلیلیتر) در تیمار زیستی شاهد و شوری صفر حاصل گردید. نتایج این تحقیق نشان داد که استفاده از ریزموجوداتی مانند قارچ و باکتری در تنش شوری میتواند از اثرات منفی شوری بر جوانهزنی و رشد این گیاه کم کند. | ||
| کلیدواژهها | ||
| درصد جوانهزنی؛ ریز موجودات؛ ریشهچه؛ کلروفیل | ||
| عنوان مقاله [English] | ||
| Effect of biological pre-treatment of seed on germination and growth indices and pigments of flaxseed (Linum usitatissimum L.) under salinity stress | ||
| نویسندگان [English] | ||
| seyyed esmaeil mousavi1؛ Heshmat Omidi2 | ||
| 1shahed university | ||
| 2Associate Professor ,Agricultural College and Medicinal Plant Research Center, Shahed University, Tehran | ||
| چکیده [English] | ||
| To study the effect of biological treatment on germination and growth indices and pigments of flaxseed under salinity stress, a factorial experiment in a completely randomized design was conducted in three replications at the faculty of agriculture of Shahed University in 2018. Experimental treatments were salinity at four levels (zero, 2.5, 5 and 7.5 dS/m) and biological treatments at four levels (control, bacteria (Baccillus subtilis), fungi (Macrophomina phaseolina) and combination of bacteria and fungi). Effect of biological treatment was significant on germination percentage and the highest germination percentage (99 %) obtained at fungi treatment. Effect of salinity and biological treatment was significant on mean germination time and germination coefficient. The minimum mean germination time (3.79 days) obtained at combination of bacteria and fungi treatment that shows this treatment was most effective in compared with other biological treatments. With increasing of salinity, mean germination time increased. Salinity reduced radicle, plumule and seedling length. The means related to radicle length at the different levels of salinity at biological treatment of fungi was highest amount in compared with other biological treatments. Interaction effect of salinity and biological treatment was significant on chlorophyll a and total chlorophyll. With increasing of salinity, reduced pigments. Maximum amount of chlorophyll a (16.52 µm.ml1-) was obtained at the control treatment of biological treatment and zero salinity. The result of this research showed that using of microorganisms such as fungi and bacteria in salinity stress, can reduce the negative effects of salinity on germination and growth of this plant. | ||
| کلیدواژهها [English] | ||
| Chlorophyll, Germination percentage, Microorganisms, Radicle | ||
| مراجع | ||
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