そ菜の光合成特性とその栽培的意義 (第4報)

伊東 正

doi:10.2503/jjshs.40.375

書誌事項

タイトル別名

Photosynthetic activity of vegetable plants and its horticultural significance
育苗中の炭酸ガス増与,空気流動がトマト,キュウリの生育,収量におよぼす影響
イクビョウチュウノタンサンガスゾウヨ , クウキリュウドウガトマト , キュウリノセイイク , シュウリョウニオヨボスエイキョウ
トマト苗の光合成速度の日変化に及ぼす内,外諸要因,特に葉内の水分,澱粉含量の影響
トマトナエノコウゴウセイソクドノニチヘンカニオヨボスウチ , ソトショヨウイン , トクニハナイノスイブン , デンプンガンリョウノエイキョウ
低炭酸ガス前歴がトマト,キュウリの生理機能におよぼす影響
テイタンサンガスゼンレキガトマト , キュウリノセイリキノウニオヨボスエイキョウ
換気扇を利用した大型ビニールハウス内のトマトの生育,収量,品質
カンキセンオリヨウシタオオガタビニールハウスナイノトマトノセイイク , シュウリョウ , ヒンシツ
同化箱による光合成測定法の検討
ドウカバコニヨルコウゴウセイソクテイホウノケントウ
低炭酸ガス濃度下でのトマト苗の生理機能
テイタンサンガスノウドカデノトマトナエノセイリキノウ
IV. Physiological aspects of low carbon dioxide experience in tomato and cucumber plants

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説明

After-effect of low-CO₂ experience upon the growth and physiology for tomato and cucumber plants was examined by means of isotopic tracers under controlled conditions. The fixation of ¹⁴CO₂ at normal CO₂ concentration, was decreased slightly in the tomato plants which had been kept for 2 hours in an atmosphere containing 80ppm CO₂. Such an after-effect of low-CO₂ experience for tomato could be brought out only when the plants had been placed under conditions of low CO₂ concentration and a certain degree of light intensity. On the other hand, cucumber plants had no after-effect of low-CO₂ experience, although total activity of ¹⁴C fixed into the plants was clearly decreased at very low CO₂ concentration. A downward translocation of ¹⁴C-assimilates to the roots was restricted more significantly in cucumber than that in tomato at 80ppm CO₂ in the light. A considerable restriction for translocation of assimilates from leaves into the roots was observed in cucumber plant during normal photosynthesis in the light. CO₂ compensation concentration which is reached in a closed system containing the plants at 20, 000 lux was 38±2ppm CO₂ for tomato and 65±4ppm CO₂ for cucumber. The amounts of CO₂ evoluted into CO₂-free air through the respiration were also higher in cucumber. Tomato plants which had been kept at 80ppm CO₂ for 2 hours had lower value of respiratory activity in the roots. In addition, low-CO₂ experience caused a considerable decrease in the uptake of phosphorus through the tomato roots. Tomato plants placed in an atmosphere containing 80ppm CO₂ for 1 hour in every morning during 2 weeks resulted in the marked decrease in dry weight of root, and considerable decrease in net assimilation rate.

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園芸学会雑誌

園芸学会雑誌 40 (4), 383-388, 1971

一般社団法人　園芸学会

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