Articles
DESICCATION TOLERANCE OF SUNFLOWER SEEDS AT ELEVATED TEMPERATURES
Article number
755_75
Pages
543 – 548
Language
English
Abstract
Sunflower seeds (Hygrophila difformis L.) with initial moisture content of 8.66% and 89.25% germination were packed in laminated (PET/Al/PE, 160 µm- thickness) bags and aged in different temperatures (20-50°C) for 14 days.
Accelerated ageing of sunflower seeds in a desiccation condition at temperatures above 40°C resulted in remarked decline in germination percentage and delay in further germination rate, monitored by germination index (GI), GI50 and GI10-90. The seeds aged especially at 50°C had significantly lowest germination percentage (59.00%) compared to the seeds at 40°C (75.25%), 30°C (81.50%) and 20°C (81.75%). The germination rate was also significantly reduced in the seeds aged at 50°C. According to a regression model assessment, ≥75% germination, accepted by Thai seed act, of the seeds stored in a shelf above 35°C will be difficult to obtain after 14 days.
Accelerated ageing of sunflower seeds in a desiccation condition at temperatures above 40°C resulted in remarked decline in germination percentage and delay in further germination rate, monitored by germination index (GI), GI50 and GI10-90. The seeds aged especially at 50°C had significantly lowest germination percentage (59.00%) compared to the seeds at 40°C (75.25%), 30°C (81.50%) and 20°C (81.75%). The germination rate was also significantly reduced in the seeds aged at 50°C. According to a regression model assessment, ≥75% germination, accepted by Thai seed act, of the seeds stored in a shelf above 35°C will be difficult to obtain after 14 days.
Authors
S. Photchanachai, T. Boonchu
Keywords
sunflower seed, ageing, germination, vigor
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