加圧下の植物の生長及び種子貯蔵
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概要
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Seedling growth under several different atmospheric pressures between 1 kg/cm<SUP>2</SUP> and 8 kg/ cm<SUP>2</SUP> is studied in gas mixtures composed of N<SUB>2</SUB>, O<SUB>2</SUB> and CO<SUB>2</SUB>. Pharbitis Nil (morning glory), Avena sativa (oats), Hibiscus esculentus (okura) and Pisum sativum (pea) are used as mate-rials. Ingeneral, hypocotyl, primary leaf, and root growth are accelerated up to 5 kg/cm<SUP>2</SUP> and inhibited above that pressure, especially in CO<SUB>2</SUB> containing gas mixtures. Rather little effect is observed in the cotyledon and coleoptile growth. And chlorophyll synthesis is depressed under high pressure but recovers easily when the pressure is lowered. At the end of the growing pe-riod, fresh weight is increased parallel to the increase of hypocotyl elongation, however, the dry weight is markedly decreased. And the rate of this dry weight decrease is larger in case of 5 kg/cm<SUP>2</SUP> than in 6 kg/cm<SUP>2</SUP> storage. These results seem to indicate that storage under higher pressure preserves the seed in good condition, because under higher pressure the consumption of the stored substances in the seed is smaller, and the enzyme systems keep their ability to metabolize many substances when the seed is returned to normal atmospheric pressure, as seen in the chlorophyll synthesizing system. <BR>In experiments using 8 plant species, seeds stored under atmospheric pressure of 11 kg/cm<SUP>2</SUP> or 21 kg/cm<SUP>2</SUP> keep higher germination ability than the one stored in open air. The former seeds maintain the ability to grow normally, when they are germinated on open air experimental beds.
- 社団法人 日本油化学会の論文