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بررسی میزان زنده مانی و اثرتیمارهای متفاوت شکستن خواب فیزیکی بر جوانه زنی بذر دو گونه درختی (نمدار و اقاقیا) | ||
| علوم و فناوری بذر ایران | ||
| مقاله 9، دوره 6، شماره 1 - شماره پیاپی 11، خرداد 1396، صفحه 89-100 اصل مقاله (564.99 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22034/ijsst.2017.113247 | ||
| نویسندگان | ||
| مریم ملاشاهی* ؛ علیرضا مشکی؛ هومن روان بخش | ||
| عضو هیئت علمی/ گروه جنگلداری در مناطق خشک، دانشکده کویر شناسی، دانشگاه سمنان، سمنان، ایران. | ||
| چکیده | ||
| دو گونه جنگلی نمدار و اقاقیا از جمله گونه های جنگلی به شمار می آیند که به دلیل دارا بودن پوسته بذر بسیار سخت و محکم دارای خواب بذر(Seed Dormancy) می باشند. جهت حذف این پوسته (شکستن خواب بذر) و تسهیل فرآیند جوانه زنی بذرهای این دو گونه و نیز بررسی تاثیر تیمارهای خراشدهی بر روی میزان جوانه زنی، بذور این دو گونه در سال 1393 از نهالستان قرق واقع در شهرستان گرگان تهیه گردید. جهت تعیین میزان زنده مانی بذرها، در ابتدا آزمون تترازولیوم انجام شد. سپس جهت بررسی تیمارهای متفاوت شکستن خواب فیزیکی (خراشدهی)، تیمارهای آب جوش(100 درجه با مدت زمان 1 دقیقه)، آب اکسیژنه(1% با مدت زمان 40 دقیقه)، اسید سولفوریک (30 درصد با مدت زمان ده دقیقه) و شاهد بر روی بذرها اعمال گردید. آزمایش ها در آزمایشگاه دانشکده کویرشناسی دانشگاه سمنان انجام شد. نتایج آزمون تترا زولیوم نشان داد که گونه های نمدار و اقاقیا به ترتیب دارای 57.25 و 78.3 درصد زنده مانی بودند. بالاترین میزان جوانه زنی در مورد بذر نمدار، تیمار آب اکسیژنه بیشترین با میزان جوانه زنی (38 % ) و در مورد بذر اقاقیا تیمار آب جوش با بیشترین میزان جوانه زنی (66.69) مشاهده گردید. از آنجایی که بذر اقاقیا با وجود دارا بودن پوسته بسیار سخت از جوانه زنی بهتری نسبت به گونه نمدار برخوردار است، می توان نتیجه گرفت که به جز پوسته سخت عوامل دیگری نیز در جوانه زنی بذر گونه نمدار دخیل هستند. | ||
| کلیدواژه‌ها | ||
| تترازولیوم؛ پوسته سخت؛ تیمار بذر؛ اسید سولفوریک؛ آب اکسیژنه | ||
| عنوان مقاله [English] | ||
| Investigation of viability rate and the effects of different breaking treatments of physical dormancy on seed germination of two tree species (Basswood and Black locust) | ||
| نویسندگان [English] | ||
| M. Mollashahi؛ A.R. Moshki؛ H. Ravanbakhsh | ||
| Assistance Professor/ Faculty of desert studies, Semnan University, Semnan, Iran. | ||
| چکیده [English] | ||
| Basswood(Tilia begonifolia) and Blacklocust (Robinia pseudoacacia) are two forest trees with seed dormancy due to very hard seed coat. Seeds of two species were collected from Ghorogh nursery in Gorgan province to remove seed coat (breaking seed dormancy) and simplify germniation process and examine the effects of scarification on their germination and viability in 2014.The tetrazolium test was done to measure the seed vitatlity.Then the seed germination rate was tested using hot water (100°C for 1 min. ), H2O2 (1 % for 10 min.), H2SO4 (30 % for 10 min.) and control treatments. The experiment was done in the laboratory of the Faculty of Desert Study (Semnan university). The results of tetrazolium test showed that Tilia begonifolia and Robiniapseudoacacia have 57.25 and 78.30 percent of viability, respectively. The highest rates of seed germination of Tilia begonifolia and Robinia pseudoacacia were observed in H2O2 (%38) and hot water (%66.69) treatments, respectively. As the seeds of Robinia pseudoacacia have higher seed germination than Tilia begonifolia despite of having hard seed coat, it can be concluded that other factors except of hard seed coat can affect seed germination of Tilia begonifolia. Basswood(Tilia begonifolia) and Blacklocust (Robinia pseudoacacia) are two forest trees with seed dormancy due to very hard seed coat. Seeds of two species were collected from Ghorogh nursery in Gorgan province to remove seed coat (breaking seed dormancy) and simplify germniation process and examine the effects of scarification on their germination and viability in 2014.The tetrazolium test was done to measure the seed vitatlity.Then the seed germination rate was tested using hot water (100°C for 1 min. ), H2O2 (1 % for 10 min.), H2SO4 (30 % for 10 min.) and control treatments. The experiment was done in the laboratory of the Faculty of Desert Study (Semnan university). The results of tetrazolium test showed that Tilia begonifolia and Robiniapseudoacacia have 57.25 and 78.30 percent of viability, respectively. The highest rates of seed germination of Tilia begonifolia and Robinia pseudoacacia were observed in H2O2 (%38) and hot water (%66.69) treatments, respectively. As the seeds of Robinia pseudoacacia have higher seed germination than Tilia begonifolia despite of having hard seed coat, it can be concluded that other factors except of hard seed coat can affect seed germination of Tilia begonifolia. | ||
| کلیدواژه‌ها [English] | ||
| Tetrazolium, hard seed membrane, seed treatment, H2SO4, H2O2 | ||
| مراجع | ||
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