Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 312764
Title Method for determining the maturity and quality of seeds and an apparatus for sorting seeds
Author(s) Jalink, H.
Source Octrooinummer: WO9742489, verleend: 1997-11-13.
Department(s) Plant Research International
Publication type Patent
Publication year 1997
Abstract The invention is related to a method and an apparatus for sorting seeds for the assessment of the maturity and quality of seeds by measuring the amount of chlorophyll fluorescence. The method is based on measuring the amount of chlorophyll fluorescence of the seed envelope and of tissue containing chlorophyll becoming visible when cracks in the seed envelope are present. The invention consists of inducing fluorescence of the chlorophyll molecule by irradiating the seeds with electromagnetic radiation with a suitable wavelength and measuring the chlorophyll fluorescence. Properties of the method are the very high sensitivity, being fully non-destructive and the very high speed. These characteristics of the invention make it possible to construct a sorting device by which seeds can be selected on basis of the amount of chlorophyll. Because the intensity of chlorophyll fluorescence is directly related to the maturity and the presence of cracks in the seed envelope, and therefore the quality of the seed, it is now possible to sort seeds on their quality. Experiments are being described of seeds from white cabbage, sugarbeet, carrot, pepper and tomato
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