کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5532482 1549928 2017 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimization of seed germination in an Iranian serpentine endemic, Fortuynia garcinii
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
Optimization of seed germination in an Iranian serpentine endemic, Fortuynia garcinii
چکیده انگلیسی


- Pericarp is responsible for seed dormancy while inside the indehiscent fruits.
- Seeds of F. garcinii require moist chilling or GA3 for uniform and fast germination.
- Seedling growth was more sensitive to Ni stress than seed germination.

Fortuynia garcinii (Brassicaceae) is endemic to serpentine soils in central Iran. It has indehiscent silicles. The effects of its fruit pericarp on seed imbibition and germination were determined. The effects of moist chilling (15 days) and gibberellic acid (GA3, four levels), both alone and combined, were also investigated. In addition, the effects of nickel (Ni) on germination and early seedling growth were evaluated. When inside the indehiscent silicles, imbibition of seeds was hampered and germination completely inhibited. Immediately after removing the pericarp, the seeds were able to imbibe as good as isolated seeds, but their germination rates were significantly lower when the removed pericarps were included in the Petri dishes. All the GA3 concentrations, moist chilling, both alone and combined, significantly shortened mean germination time (MGT), and increased the germination index (GI) and the germination percentage (GP). Excess Ni did not affect GP, but inhibited seedling growth. In conclusion, the pericarp inhibits seed germination, both chemically and mechanically, through impeding imbibition, in F. garcinii. Moist chilling or GA3 improves the speed and final percentage of germination. Seedling growth is much more sensitive to Ni excess than seed germination.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Flora - Volume 231, June 2017, Pages 38-42
نویسندگان
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