Germination Response of Uniola latifolium

in HortScience

Broadleaved uniola (Uniola latifolium Michx.) caryopses and florets were prechilled or not prechilled, supplied with potassium nitrate (KNO3) or water only, and diurnal germination temperature alternations of 15/30C or 20/30C were used. Caryopses and florets both reached 50% germination by 10 days after planting with KNO3; however, in water, caryopses reached 50% germination significantly earlier than florets (18 vs. 30 days). Germination temperature and prechilling had no effect on days to 50% germination. Final germination percentages were significantly higher for caryopses than florets at both germination temperatures and for caryopses germinated at 15130C than at 20/30C (85% vs. 74%). Significantly more seeds germinated with KNO3 than in water (85% vs. 57%). Prechilling had no effect on final germination percentage. Caryopses germinated with KNO3 at 15/30C achieved the highest final germination percentage.

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