Abstract
The effects of different priming treatments and priming durations on germination percentage at different temperatures in parsley seeds were studied. The seeds were treated for 2, 4, 6 and 8 days with the PEG 6000 (–0.5 MPa, –1.0 MPa and –1.5 MPa), KNO3 (0.30 mol/L and 0.35 mol/L), Mannitol (0.50 mol/L and 0.60 mol/L) and hydropriming (12h, 24h, 36h and 48h) and unprimed (control). Germination studies were made at 5, 10, 15, 20 and 25°C. Percentage of germination at different temperatures was significantly affected by priming treatments. Hydropriming (12h, 24h and 36 h) and mannitol 0.60 mol/L at 2 day generally had the highest germination percentages. In general, the highest germination percentage with priming was determined at 10°C. It may be said that seed priming treatments increased seed germination percentage at both low and high temperatures. The highest germination percentages were observed in both hydropriming and mannitol treatments as compared with PEG and KNO3 treatments. The PEG and KNO3 (2 and 4 days) treatments were better than unprimed treatment in all of the temperatures.
Highlights
Vegetables are important for human nutrition and its importance is getting increase in all around of the world
The findings presented on seed germination of parsley in this research showed similar results with different researches being made on priming treatment at different plant seeds so far
When the treatments used in this study were evaluated, the highest germination percentage was observed in hydropriming and mannitol treatments as compared with PEG, KNO3 and the control
Summary
Vegetables are important for human nutrition and its importance is getting increase in all around of the world. Good and high crop establishment is one of the major challenges to crop production in the world and its importance is recognized by farmers as well as researchers [1,2]. To improve vegetable stand establishment, priming techniques including osmopriming, solid matrix priming and hydropriming can be used. Hydration is sufficient to allow pregerminative metabolic activation to take place, but insufficient to allow radicle protrusion through the seed coat [4]. This technique has been used in some vegetable seeds to increase the seed vigor, the germination speed, total germination rate and seedling uniformity, mainly under unfavorable environmental conditions. The technique can lead to better crop stands and higher crop yields [5,6]
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