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Effects of combining priming and plant growth regulator treatments on the synchronisation of carrot seed germination
Author(s) -
PILL W. G.,
FINCHSAVAGE W. E.
Publication year - 1988
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1988.tb03314.x
Subject(s) - germination , priming (agriculture) , peg ratio , biology , horticulture , polyethylene glycol , biochemistry , finance , economics
SUMMARY Osmotic priming of carrot seeds for 2 wk in polyethylene glycol (PEG, — 10 MPa) at 15 °C led to more rapid and synchronous germination at 20 °C compared to untreated seeds. These responses were enhanced by a 24 h pre‐priming soak in water or a change of solution after the first 24 h of priming to remove leachate. The inclusion of 200 mg litre ‐1 N‐substituted phthalimide in the pre‐priming soak and/or in the PEG further enhanced the results of priming. Leachate removal combined with phthalimide inclusion gave 79% and 86% germination from seeds of two carrot cultivars during the first day in 20°C water following priming. In contrast, cumulative germination of untreated seeds of the same cultivars was 18% and 61% respectively after 3 days in 20°C water. Seeds primed in PEG containing 200 mg phthalimide litre ‐1 with the solution replaced after the first 24 h germinated earlier and more synchronously than untreated seeds over a range of germination temperatures (5, 10, 15, or 20°C), but the effects of priming were most marked at 5°C.