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KMID : 0903619850260020158
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Journal of the Korean Society for Horticultural Science
1985 Volume.26 No. 2 p.158 ~ p.162
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Effects of Specific Light Qualities on the Seed Germination of Amaranthus hypochondriacus
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Abstract
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Dark seed germnation of Amaranthus hypochondriacus was studied in relation to the influence of different seed ages, specific light qualities and temperature. The experimental results obtained for two periods of observation revealed the following conclusions, namely;
1. Extent of the seed germination in various light regimes lessened as the seed age became older.
2. Both the promotive and inhibitory effects of the seed germination were more striking at the lower temperature (20℃), whereas less so at the higher (30℃).
3. The seed germination response to the following light-quality treatments also became dull as the time of germination elapsed.
4. The seed germination was promoted at most in the dark and in red light, whereas cool white fluorescent and particularly far-red light inhibited it.
It is presumed that the white light includes considerable amount of far-red portion of the spectrum which might have been involved in the inhibitory effect on the germination. The promotive effect of red light and inhibitory far-red light suggested the fact that seed germination of A. hypochondriacus is also an example of the phytochrome mechanism in both light and dark sensitive seed germination of other plants.
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