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Open Access Article
1 - تاثیر روش‌های متفاوت پیش تیمار بذر بر جوانه‌زنی، رشد و استقرار گیاهچه سویا
نبی خلیلی اقدم تورج میرمحمودی -
Open Access Article
2 - بررسی نقش بهبود دهنده کلرید کلسیم بر شاخص‌های جوانه‌زنی بذر و رشد اولیه گیاهچه ذرت تحت تنش شوری ناشی از NaCl
یوسف قاضی خانلو ثانی حمید باقری خلیل جمشیدی -
Open Access Article
3 - Investigation how to establishment Vetiver Grass with the approach of controlling Sediment yield and Run-off in Rangelands (Case Study: Vaz watershed)
shabanali gholamiIn the present study, Vetiver Grass has been planted on the slopes of Gazna Sara of watershed in Nour city of Mazandaran Province in two pilots and in the different slope and directions and on five lines (on countered lines) and in the watershed of each pilot. For takin MoreIn the present study, Vetiver Grass has been planted on the slopes of Gazna Sara of watershed in Nour city of Mazandaran Province in two pilots and in the different slope and directions and on five lines (on countered lines) and in the watershed of each pilot. For taking care of plants, it was enclosure and during the summer, irrigation was performed three times. The results showed that Vetiver Grass in the pilot (1) absolutely have been deployed, but in the pilot (2) Vetiver Grass has been established in the first half of year but in the second half the plant was died due to frost in low temperature (-12C°). Therefore, the survival rate in the pilot (1) reached 90% and in the pilot (2) in the first half to 60 percent but in the second half was zero. Vetiver grass could bear the maximum and minimum temperatures (29 and -9 C°) as well as the maximum and minimum relative humidity (100 and 40%). And also it has shown consistent in soil with a PH =7.5 and EC = 794 Micro-seimenc. It's average shoot and root growth the plant in the pilot (1) in the first year was 41 and 52 cm, respectively and in the pilot (2) in the first six months was 26 and 32 Manuscript profile -
Open Access Article
4 - تاثیر روش‌های متفاوت پیش تیمار بذر بر جوانه‌زنی، رشد و استقرار گیاهچه سویا
نبی خلیلی اقدم تورج میرمحمودی -
Open Access Article
5 - بررسی نقش بهبود دهنده کلرید کلسیم بر شاخص‌های جوانه‌زنی بذر و رشد اولیه گیاهچه ذرت تحت تنش شوری ناشی از NaCl
یوسف قاضی خانلو ثانی حمید باقری خلیل جمشیدی -
Open Access Article
6 - اثرخراش دهی اسیدی و سرما روی جوانه زنی بذر سه گونه درختی فضای سبز
بهاره دل طلب نیره نظیری مقدم مجتبی خرمی راد بهزاد کاویانیجوانهزنی 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 تیمار Moreجوانه‌زنی 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. Manuscript profile -
Open Access Article
7 - Effect of Physical Treatments on Stand Establishment, Phenology and Yield of winter wheat (Triticum aestivum var. Alvand)) under different sowing dates
Bahram Mirshekari Reza Siyami To investigate the effect of physical treatments on stand establishment, phenology and yield of winter wheat (Triticum aestivum var. Alvand)) under different sowing dates an experiment was conducted in Tabriz, Iran. The wheat seeds were tr More To investigate the effect of physical treatments on stand establishment, phenology and yield of winter wheat (Triticum aestivum var. Alvand)) under different sowing dates an experiment was conducted in Tabriz, Iran. The wheat seeds were treated by ultrasonic, laser, magnetic field, gamma and beta irradiations for 3.5 and 5 min. and were sown on dates of 27th September and 17th October. All the seed priming treatments improved the coefficient of uniformity of emergence compared with non-primed seeds. Seedling vigor index responded positively and significantly to seed priming agents. There was no significant difference among laser, gamma and beta irradiations with a view to time from sowing to harvesting. Wheat seeds primed by magnetic fields, ultrasonic waves and lower exposure time of gamma irradiation had high chlorophyll in leaves. There is no significant difference between seed yields from sowing dates of 27th September and 17th October, and the yield ranged from 334 g.m-2 in average of control; laser and beta irradiations and higher exposure time of gamma up to 480.1 g.m-2 in other treatments. It is concluded from the study that wheat seed priming by magnetic fields, ultrasonic waves and lower exposure time of gamma irradiation can be effectively used to improve the crop performance and yield especially in late sown plants. Manuscript profile -
Open Access Article
8 - Seed germination indices and initial growth of safflower seedlings with different thousand kernel weights under drought stress
Hamid Bagheri Yousof Ghazi Khanloosani Esmaiel Zangani Babak Andelibi Mohamad Reza Azimi Moghadam Soleiman JamshidiTolerant seeds to drought stress could play significant role in steady seedling establishment and subsequent yield increase. In order to study the germination and initial seedling growth indices of safflower (cv. Sina) seeds with different thousand kernel weights (TKW) MoreTolerant seeds to drought stress could play significant role in steady seedling establishment and subsequent yield increase. In order to study the germination and initial seedling growth indices of safflower (cv. Sina) seeds with different thousand kernel weights (TKW) of 23, 23.83, 25.13 and 27.27 g, under different drought stress intensities, an experiment was carried out as factorial based on a completely randomized design in Physiology Laboratory of Zanjan University. Drought stress levels comprising 0 (control), -4 and -8 bar were obtained using polyethylene glycol 6000. Increasing drought stress intensity significantly decreased germination percentage from 81.8% in control to 57.8% in -8 bar. Seeds with higher TKW were better in terms of germination percentage and germination coefficient rate. The seeds with 27.27 TKW produced longer radicle and plumule in drought stress condition. Besides, seeds with higher TKW showed higher vigor index and seedling dry and fresh matter. In conclusion, seeds with higher TKW showed higher germination indices and were more tolerant to drought stress. Manuscript profile -
Open Access Article
9 - Allelopatic and sowing depth effects of river red gum on seed germination and initial growth of sainfoin
Setareh Bagheri Valiollah Raufirad Ali Tavili Mohammade JafariABSTRACT Inthis study, allelopathic potential of Eucalyptus canaldulensis and sowing depth was studies on germination characteristics and vegetative growth of Onobrychis sativa seedlings using completely randomized design with four replications and two MoreABSTRACT Inthis study, allelopathic potential of Eucalyptus canaldulensis and sowing depth was studies on germination characteristics and vegetative growth of Onobrychis sativa seedlings using completely randomized design with four replications and two factors. The first factor was aqueous extracts of 1, 2, 3, and 5% of eucalyptus leaf powder in 1000 g of soil and the second factor was sowing depth in four levels including 0.5 as control, 1.5, 3, and 4.5 cm. Effect of allelopathic, sowing depth and their interaction on all traits but root length was significant. Effect of eucalyptus on shoot dry weight was more than other traits. On the whole, increasing in sowing depth had a negative effect on all traits and when allelopathy and sowing depth integrated, their negative effects were more significantly than their sole effects. Therefore, considering of allelopathy and sowing depth could have a determinative role in the eucalyptus growing lands. Manuscript profile -
Open Access Article
10 - Gibberellic acid priming effect on Agropyron elongatum seed germination indices under drought stress
Seyyed Jalal Yadollahi Nooshabadi Farzad SharifzadeSeed priming pretreatment improves germination characteristics , seedling establishment and increase of seed performance under environmental stress conditions. This experiment was conducted as factorial based on a completely randomized design with four replication MoreSeed priming pretreatment improves germination characteristics , seedling establishment and increase of seed performance under environmental stress conditions. This experiment was conducted as factorial based on a completely randomized design with four replications using osmotic potential of -12 bar prepared by polyethylene glycol in order to evaluate the effects of gibberellic acid (GA) pretreatments on the behaviour of seed germination of Agropyron elongatom under drought stress. . Seeds were primed for 12 and 24 hours at two temperatures of 10 and 20°C with GA in three levels of 25, 50 and 100 ppm . All seed pretreatments had significant effect on the whole studied characteristics. Concentration of 25 ppm with GA was the best pretreatment which could increase significantly the whole germination percentage, normal seedling percentage, and length index of seedling vigor.The results obtained in temperature 10 and time duration of 12 were better in comparison to temperature 20 and time duration of 24 and significantly increased the germination and normal seedling percentage. Totally,the useful effects of seed pretreatment method with GA was confirmed for improving the seed germination performance of Agropyron elongatom especially in drought stress condition. Manuscript profile -
Open Access Article
11 - Effects of priming with micronutrients on seed reserve mobilization of lentil at different temperatures
Ali Asghar AlilooCrop yield in rain-fed regions is always affected by environment so that the instability of crop yield is considerably high in this condition. The study was carried out to evaluate effects of seed priming with Cu I, Zn II, K I, ZnSo4 on germination traits and seedling e MoreCrop yield in rain-fed regions is always affected by environment so that the instability of crop yield is considerably high in this condition. The study was carried out to evaluate effects of seed priming with Cu I, Zn II, K I, ZnSo4 on germination traits and seedling establishment at two temperatures of (10 °C and 20 °C). Results showed that seed priming influenced germination rate significantly and the primed seeds revealed higher germination rate than the unprimed seeds. The higher value was obtained by ZnSo4 treatment. However, germination percentage was not affected by priming treatments even though the priming slightly improved the value in comparison to control. Results also showed that the response of primed seeds to the low temperature was higher than in the high temperature. Remobilization of seed reserves was enhanced under priming treatments and the percentage of reserves depletion, conversion efficiency and total mobilized reserves were increased by seed treatments. It was concluded that not only the used compounds (particularly ZnSo4) can improve lentil establishment at early stages but also the compounds could be useful at bio-fortification programs at later stages. Manuscript profile
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