Effect of Dissolved O2 levels in a Nutrient Solution on the Growth and Mineral Nutrition of Tomato and Cucumber Seedlings.
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Accession number;99A0922084
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| Title;Effect of Dissolved O2 levels in a Nutrient Solution on the Growth and Mineral Nutrition of Tomato and Cucumber Seedlings. |
| Author;
RONG G S
(Mie Univ., Fac. of Bioresour.)
TACHIBANA SHOJI
(Mie Univ., Fac. of Bioresour.)
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Journal Title;Journal of the Japanese Society for Horticultural Science
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Journal Code:F0626A
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ISSN:0013-7626
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VOL.66;NO.2;PAGE.331-337(1997)
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| Figure&Table&Reference;FIG.2, TBL.4, REF.24 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;The root systems of tomato (Lycopersicon esculentum Mill., cv. Hausu-Momotaro) and cucumber (Cucumis sativus L., cv. Sharp I) seedlings were subjected to four different dissolved O2(DO) levels in nutrient solution for 8 days under artificial light conditions. The DO levels were kept constant at 1, 2, 4 and 8ppm, and the solution temperature was controlled at 22 and 30.DEG.C. for tomato and at 25 and 33.DEG.C. for cucumber. 1. Growth of tomato plants at 1 and 2ppm DO was inferior to that at higher DO levels, irrespective of solution temperatures. 2. Growth of cucumber plants was slightly retarded even at 1ppm when the solution was held at 25.DEG.C.. At 33.DEG.C., the growth was significantly inhibited at 1 and 2ppm DO levels, similar to tomato. These results suggest that to control the vegetative growth of young plants in DFT by means of the DO level, lowering the DO level to about 2ppm is appropriate for tomato. For cucumber, however, it seems necessary to lower the DO level well below 1ppm to control effectively its vegetative growth. Possible causes of the difference in the tolerance to low DO levels between tomato and cucumber are discussed as to the morphological changes and iron-induced oxygen radical formation in the roots. (author abst.) |
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