Effect of post-irradiation ageing on onion seeds |
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Authors: | Muhammad Amjad Muhammad Akbar Anjum |
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Institution: | (1) Institute of Horticultural Sciences, University of Agriculture, Faisalabad, 38040, Pakistan;(2) University College of Agriculture, Bahauddin Zakariya University, Multan, 60800, Pakistan;(3) Pakistan Council for Science and Technology, Shahrah-e-Jamhuriat, G-5/2, Islamabad, Pakistan |
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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. |
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Keywords: | Allium cepa Onion Seed irradiation Accelerated ageing Germination potential Seedling growth Seed viability |
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