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The effect of dissolved O_2 concentration on growth of lettuce plants (Lactuca sativa L.) was analyzed in hydroponics. The plants were grown for 7 days under different dissolved O_2 concentrations con...trolled at 0.01, 0.10 and 0.20mM. Number of leaves was scarcely affected by the dissolved O_2 concentration, but leaf expansion was depressed at 0.01mM where leaf water content became lower. Furthermore, the fresh and dry weights of leaves and roots were clearly reduced at 0.01 mM. On the other hand, difference in plant growth between 0.10 and 0.20mM was scarcely found. These results suggest that growth of the lettuce plants at the lowest dissolved O_2 concentration of 0.01mM is depressed through leaf turgor loss caused by decrease in root water uptake.続きを見る
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Mendeley出力
KJ00004506877