اثرات تیمارهای دودی بر جوانه‌زنی بذرهای استراتیفیکاسیون شده گیاه دارویی- مرتعی کما (Boiss. Ferula ovina)

نوع مقاله: پژوهشی

نویسندگان

1 گروه زراعت، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران

2 گروه زیست‌شناسی، دانشگاه گلستان، گرگان، ایران

3 گروه زراعت، پردیس ابوریحان دانشگاه تهران، تهران، ایران

چکیده

گیاه کما (Apiaceae)Boiss.  Ferula ovina یک گیاه چندساله دارویی در مراتع و مناطق کوهستانی مرتفع ایران است. جمعیت این گونه دارویی- مرتعی ارزشمند به‌دلیل بهره‌برداری بی‌رویه، تغییر شرایط اقلیمی همین‌طور کمون بذرهای آن در زمان بلوغ رو به کاهش است. در این تحقیق برای نخستین بار اثر تیمارهای دودی (ذرات دود و دو روش تهیه عصاره دودی) حاصل از سوختن کاه گندم بعد از اعمال دوره­های مختلف استراتیفیکاسیون سرد (0، 7، 15 و 30 روز) بر جوانه­زنی بذرهای کما مطالعه شد. بر اساس نتایج، استراتیفیکاسیون باعث تغییر سطح کمون و افزایش درصد و سرعت جوانه­زنی بذرهای کما به طور معنی دار نسبت به شاهد شد. اعمال تیمار ذرات دودی بعد از استراتیفیکاسیون، سرعت و درصد جوانه­زنی بذرها را نسبت به شاهد افزایش داد. بیشترین افزایش درصد جوانه­زنی نسبت به شاهد (20 درصد) در تیمار 2 دقیقه مجاورت با ذرات دود بعد از 7 روز استراتیفیکاسیون سرد مشاهده شد. دو روش عصاره دودی مورد استفاده در این تحقیق در دامنه 001/0 و 01/0 نسبت حجمی بعد از استراتیفیکاسیون جوانه­زنی بذر را افزایش دادند به‌طوری‌که بیشترین درصد جوانه­زنی (80 درصد) از نسبت 001/0 محلول آبی کاه نیم سوز بعد از 30 روز استراتیفیکاسیون به دست آمد، اما محلول پایه دود آب منجر به کاهش درصد جوانه­زنی در تیمارهای 0 و 30 روز استراتیفیکاسیون و تولید گیاهچه­های ضعیف در تمامی دوره­های استراتیفیکاسیون شد. به‌طورکلی، نتایج این تحقیق نشان داد که اعمال تیمارهای دودی در این مطالعه سرعت و درصد جوانه­زنی بذرهای استراتیفیکاسیون شده کما را بهبود می‌بخشد.
 

کلیدواژه‌ها


عنوان مقاله [English]

Impacts of smoke treatments on germination of cold-stratified seeds in medicinal-rangeland plant Ferula ovina Boiss. (Apiaceae)

نویسندگان [English]

  • Sanaz Zardari 1
  • Farshid Ghaderi-far 1
  • Hamid Reza Sadeghipour 2
  • ebrahim zeinali 1
  • Elias Soltani 3
1 Department of Agronomy, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
2 Department of Biology, Golestan University, Gorgan, Iran
3 Department of Agronomy and Plant Breeding Sciences, Aboureihan Campus University of Tehran, Tehran, Iran
چکیده [English]

Ferula ovina Boiss. (Apiaceae) is a perennial rangeland medicinal plant found in the mountainous area of Iran. Due to overexploitation, climate changes in the area, and seed dormancy at time of maturity, the population of this species is being reduced. Accordingly, in the present study the effects of smoke treatments (aerosol smoke and two methods of smoke extract preparation) were investigated on seed germination characteristics of this plant after varying periods of cold stratification including 0, 7, 15, and 30 days. Findings suggested that cold stratification changed significantly the level of seed dormancy and increased the rate and percentage of seed germination. Furthermore, aerosol smoke applied after cold stratification increased the rate and percentage of seed germination. The greatest increase in germination percentage compared to control (20%) was observed in seeds that had been cold-stratified for 7 days and were exposed to aerosol smoke for two minutes. Smoke extracts with concentrations (0.001 - 0.01 v/v) prepared by the two methods also increased the germination of cold stratified seeds so that the maximum percentage of germination (80%) was obtained for seeds cold stratified for 30 days and treated with 0.001 dilution of charred straw solution. However, undiluted smoke water decreased the percentage of seed germination after 0 and 30 days of cold stratification and led to abnormal seedling development. In general, the results of this study demonstrated that smoke treatments improve seed germination percentage and speed of cold stratified Ferula ovina seeds.
 

کلیدواژه‌ها [English]

  • Apiaceae
  • Karrikin
  • Smoke aerosol
  • Smoke extract
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