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عنوان دوره: پانزدهمین کنگره زراعت و اصلاح نباتات ایران
نویسندگان
1Department of Horticultural Science, College of Agriculture, Isfahan University of Technology, 84156-83111, Isfahan, Iran
2-Department of Horticultural Science, College of Agriculture, Isfahan University of Technology, 84156-83111, Isfahan, Iran
3Department of Agronomy and Plant Breeding, College of Agriculture, Isfahan University of Technology, 84156-83111,
4Nuclear Agriculture Research School, Nuclear Science and Technology Research Institute, Karaj, Iran
چکیده
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کلیدواژه ها
Title
Partial alleviation of Gamma-Irradiated Stress in Tall fescue by Seaweed
Extracts
Authors
Abstract
This study was conducted to investigate the possible mediatory role of brown seaweeds extracts in alleviating the
harmful effect of gamma-irradiation stress on seed germination and seedling growth. We have used sub lethal
doses 200 Gy (GR50 obtained in our previous study) of gamma irradiation as a stress system. Irradiated and unirradiated
seeds were treated by 0.0, 0.2, 0.4, and 0.6 % of seaweed extracts. The seeds were sown on filter papers
in l0 cm Petri dishes designed in completely randomized design with three replicates. The Petri dishes were placed
in an incubator at 22oC and 16 h light. Different parameters of seed germination and seedling growth were
calculated. Our results showed that gamma radiation reduced the growth parameters (FGP, MGT, GI, and
coleoptile and radicle length) as compared to un-irradiated seeds. Treatment of irradiated seeds with seaweed
extract partially alleviated the adverse effects of irradiation, significantly increasing seed germination parameters
and seedling growth.The present results suggested that seaweed extract can be a promising candidate for priming
and treatment of the seeds to reduce mortality in seedlings, and may play an effective role in the radio-repair
mechanism.
harmful effect of gamma-irradiation stress on seed germination and seedling growth. We have used sub lethal
doses 200 Gy (GR50 obtained in our previous study) of gamma irradiation as a stress system. Irradiated and unirradiated
seeds were treated by 0.0, 0.2, 0.4, and 0.6 % of seaweed extracts. The seeds were sown on filter papers
in l0 cm Petri dishes designed in completely randomized design with three replicates. The Petri dishes were placed
in an incubator at 22oC and 16 h light. Different parameters of seed germination and seedling growth were
calculated. Our results showed that gamma radiation reduced the growth parameters (FGP, MGT, GI, and
coleoptile and radicle length) as compared to un-irradiated seeds. Treatment of irradiated seeds with seaweed
extract partially alleviated the adverse effects of irradiation, significantly increasing seed germination parameters
and seedling growth.The present results suggested that seaweed extract can be a promising candidate for priming
and treatment of the seeds to reduce mortality in seedlings, and may play an effective role in the radio-repair
mechanism.
Keywords
Gamma rays, seaweed extract, seed germination, seedling growth