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Acta Physiologiae Plantarum

, Volume 29, Issue 1, pp 63–69 | Cite as

Effect of post-irradiation ageing on onion seeds

  • Muhammad Amjad
  • Muhammad Akbar AnjumEmail author
Original Paper

Abstract

Seeds of onion (Allium cepa) cv. Ailsa Craig were exposed to various doses of gamma radiation (0, 10, 20, 40, 80 and 100 krad) and subjected to accelerated ageing (RH 100%, 42°C) for 12 h. Radiation doses significantly affected the percentage of normal seedlings, abnormality types (%) and seedling growth. Seed viability, conductivities of seed leachates, final germination (%), germination speed and time to reach 50% germination (T 50) were not affected by the seed irradiation. Accelerated ageing after irradiation had significant influence on seed viability, conductivities of seed leachates, final germination (%) and percentage of normal seedlings. Germination speed, T 50 and seedling growth were not affected by the accelerated ageing. However, all the parameters studied were significantly influenced by the interaction of radiation doses and accelerated ageing. Accelerated ageing generally enhanced the damaging effects of irradiation on seeds. Therefore, it was concluded that onion seeds should not be exposed to adverse environmental conditions after irradiation.

Keywords

Allium cepa Onion Seed irradiation Accelerated ageing Germination potential Seedling growth Seed viability 

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Copyright information

© Polish Academy of Sciences 2006

Authors and Affiliations

  1. 1.Institute of Horticultural SciencesUniversity of AgricultureFaisalabadPakistan
  2. 2.University College of AgricultureBahauddin Zakariya UniversityMultanPakistan
  3. 3.Pakistan Council for Science and TechnologyIslamabadPakistan

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