Studies on Trace Contaminant Accumulated in Closed Systems. Effects of Ethylene on the Growth of Lettuce.:—Effects of Ethylene on the Growth of Lettuce—
スポンサーリンク
概要
- 論文の詳細を見る
Lettuce plant (<I>Lactuca sativa</I> L. cv. Okayama), which is a candidate for vegetables cultivated in Controlled Ecological Life Support Systems (CELSS), was exposed to ethylene. Effects of ethylene on the plant growth were investigated in order to determine an allowable level of ethylene. Although a few reports showed a decrease in rates of photosynthesis and transpiration of some plant species by 1.0μL L<SUP>-1</SUP> ethylene, no decreases in the rates of lettuce plant were observed at 0.1 to 1.0μL L<SUP>-1</SUP> of ethylene under any photosynthetic photon flux density (130, 270, and 380μmol m<SUP>-2</SUP> s<SUP>-1</SUP>) . Then, the plant absorbed ethylene and the absorption rate increased with ethylene concentration. But the plant did not absorb ethylene under dark conditions. This fact might mean that lettuce absorbed ethylene mainly through stomata. The plant cultivated at 0.5μL L<SUP>-1</SUP> ethylene for 10 days showed epinasty, chlorosis and inhibition of leaf expansion. These phenomena resulted in growth inhibition of lettuce plant. Leaf expansion of the plant cultivated at 0.1μL L<SUP>-1</SUP> ethylene was also significantly inhibited. The plant growth rate was slightly lower compared with plants grown in ethylene-free air. From these results, it is obvious that a low concentration of ethylene influenced leaf expansion and chlorophyll degradation of lettuce plant, but not the rates of photosynthesis and transpiration. The allowable level of ethylene for lettuce plant seemed to be about 0.1μL L<SUP>-1</SUP>.
- 日本生物環境工学会の論文
日本生物環境工学会 | 論文
- 温室における燃焼式蓄熱型二酸化炭素施肥システムの省エネルギー性・環境負荷低減性・経済性評価
- 高濃度培養液を用いる高糖度トマト生産に適した循環キャピラリー栽培システムの開発
- 2種のUV励起光によるラッカセイ生葉のLIFスペクトル変化および蛍光葉内分布
- ナメコ子実体の光形態形成過程における発現遺伝子の解析
- 光の波長と環境温度がナメコの生体電位および形態形成に及ぼす影響