Botanical Studies in the Genus Oryza II. Germination Behaviour
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概要
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Using 1,789 strains belonging to 20 species of the genus Oryza, including 2 cultivated and 18 wild species, germination behaviour, including days from sowing to germination, germination process, germination duration, germiability after some period, final germination percentage and biological significance of these characters were studied.Most of the cultivated species of O. sativa and O. glaberrima, germinated within 1-2 days after sowing and the percentage increased within 9 days. Afterwards it remained stationary. Ungerminated grains within 9 days after sowing were considered, in the case of cultivated species, to have lost germiability.Wild species could be classified into five groups with respect to germination behaviour according to the data obtained. Most of the wild species used could germinate at less than hundred percent during 9 days after sowing. Long term experiments had to be carried out during one year. Some strains could germinate even 334 days after sowing. It was concluded that complete and rapid germination is a general characteristic of the cultivated strains and those taxonomically related to them. The biological significance of germination behaviour was discussed. The germiability found in these experiments is interpreted in terms of botanical requirements as natural conditions.
- 鹿児島大学の論文
- 1969-03-25
著者
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