The Effect of Cold and Acid Scarification on Seed Germination of Three Green Space Tree Species
محورهای موضوعی : مجله گیاهان زینتی
Bahareh Deltalab
1
,
Nayyere Naziri Moghaddam
2
,
Mojtaba Khorrami Raad
3
,
Behzad Kaviani
4
1 - Ph.D. Student of Agroecology, Razi University, Kermanshah, Iran
2 - Department of Horticultural Science, Rasht Branch, Islamic Azad University, Rasht, Iran
3 - School of Ecosystem and Forest Sciences, Faculty of Science, The University of Melbourne, Creswick, Australia
4 - Department of Horticultural Science, Rasht Branch, Islamic Azad University, Rasht, Iran
کلید واژه: Scarification, priming, Seed dormancy, Forest trees, Plant stablishment,
چکیده مقاله :
Seed germination of some woody species is done with difficulty and at a low rate due to various reasons, including physiological and mechanical dormancy and the presence of inhibitory substances in the seed tissues. Priming is one of the most important treatments to increase the germination capacity of seeds. The purpose of this study was to investigate the effect of different treatments of stratification and sulfuric acid on the growth and germination percentage of Robinia pseudoacacia, Ailanthus altissima and Fraxinus excelsior seeds. This research was done as factorial in the randomized completely block design with two factors; plant and stratification in four replications. The results showed that the highest percentage of germination (72%) was obtained in the 50% sulfuric acid treatment on R. pseudoacacia, seeds and the lowest one (18 and 12%) in the control and 95% sulfuric acid treatments on F. excelsior seeds, respectively. The overall results of this research showed that the best stratification treatment for most of the measured traits was 50% sulfuric acid and 3°C cold for 20 days.
جوانه‌زنی بذر برخی گونه‌های چوبی به دلایل مختلف از جمله خفتگی فیزیولوژیکی و مکانیکی و حضور ترکیبات ممانعت‌کننده در بافت‌های بذر با مشکل و در میزان پایین انجام می‌شود. پرایمینگ یکی از مهم‌ترین تیمارها برای افزایش ظرفیت جوانه‌زنی بذرها است. هدف این مطالعه، بررسی اثر تیمارهای مختلف چینه سرمایی و اسید سولفوریک روی رشد و درصد جوانه‌زنی بذرهای اقاقیا، عرعر و زبان گنجشک بود. این پژوهش به صورت فاکتوریل در قالب طرح بلوک کامل تصادفی با دو عامل؛ گیاه و چینه سرمایی در چهار تکرار انجام شد. نتایج نشان داد که بالاترین درصد جوانه‌زنی (72 درصد) در تیمار اسید سولفوریک 50 درصد روی بذرهای اقاقیا و پایین‌ترین آن (18 و 12 درصد)، به ترتیب در تیمارهای شاهد و اسید سولفوریک 95 درصد روی بذرهای زبان گنجشک به دست آمد. نتایج کلی این پژوهش نشان داد که بهترین تیمار چینه سرمایی برای اغلب صفات اندازه‌گیری‌شده، اسید سولفوریک 50 درصد و سرمای سه درجه سانتی‌گراد به مدت 20 روز بود.
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