Articles
EFFECTS OF OSMOPRIMING TREATMENTS ON SEED GERMINATION OF TWO TYPES OF RADICCHIO (CICHORIUM INTYBUS VAR. SILVESTRE)
Article number
631_11
Pages
95 – 102
Language
English
Abstract
To improve germination of two types of radicchio (Rosso di Chioggia, RCh, and Bianco di Chioggia, WCh) various pre-sowing treatments were evaluated.
A non-soaked control was compared with seeds primed for 2, 4, 6, 8 hours in plain water (hydropriming) or in solutions containing the following concentration of polyethylene glycol (PEG 6000) and potassium nitrate (KNO3): a) PEG at -0.5, -0.9 and -1.7 MPa; b) KNO3 at -0.12, -0.24 and -0.52 MPa.
After soaking, seeds were rinsed and placed in petri-dishes at 20 or 27°C germination temperature.
Pre-sowing treatments affected the germination percentage more than the mean time of germination, and the effects were more evident in RCh and when 20°C germination temperature was applied.
Generally, the higher germination percentage was obtained with longer hydropriming (6-8 hrs) and with short treatment (2 hrs) with osmotic compounds.
KNO3 proved to be less effective than PEG which gave, on average, the best results at -0.5 and -0.9 MPa water potential.
A non-soaked control was compared with seeds primed for 2, 4, 6, 8 hours in plain water (hydropriming) or in solutions containing the following concentration of polyethylene glycol (PEG 6000) and potassium nitrate (KNO3): a) PEG at -0.5, -0.9 and -1.7 MPa; b) KNO3 at -0.12, -0.24 and -0.52 MPa.
After soaking, seeds were rinsed and placed in petri-dishes at 20 or 27°C germination temperature.
Pre-sowing treatments affected the germination percentage more than the mean time of germination, and the effects were more evident in RCh and when 20°C germination temperature was applied.
Generally, the higher germination percentage was obtained with longer hydropriming (6-8 hrs) and with short treatment (2 hrs) with osmotic compounds.
KNO3 proved to be less effective than PEG which gave, on average, the best results at -0.5 and -0.9 MPa water potential.
Authors
P. Sambo, G. Gianquinto, F. Pimpini
Keywords
germination temperature, mean time of germination, polyethylene glycol (PEG), potassium nitrate, priming duration
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