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RISS 인기검색어
- 검색키워드
- 저자 : Chiwon William Lee (검색결과 1 건)
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Translocation and Distribution of Photosynthetic Assimilates in Watermelon and Tomato
Sang-Gyu Lee,Kwan-Dal Ko,Chiwon William Lee 한국원예학회 2006 Horticulture, Environment, and Biotechnology Vol.47 No.4
The patterns of translocation and distribution of C¹⁴ labeled photo-assimilates in watermelon and tomato grown in the greenhouse and field were characterized. Each of the mature leaves of the plants at the time of active fruit development stage was exposed to ¹⁴CO₂ (20 μCi) for 40 min and the leaves, stems, fruits, and roots were harvested 3, 6, 9, or 12 h after treatment. One half of the plants were grown under natural light and the other half in the dark during the experimental period. The activity of C¹⁴ in the dry tissues of leaves, stems, fruits, and roots were determined, using a liquid scintillation analyzer. Both watermelon and tomato plants grown in the greenhouse and field contained C¹⁴ in all types of tissues 3 h after treatment, regardless of exposure to light or dark during the experiment. Watermelon and tomato, respectively, transferred 22 to 61% and 9 to 26% C¹⁴ from the source leaves in 3 h. Fruit tissues served as the strongest sink, with the highest percentages of Cl4 transfer in watermelon (99%) and tomato (90%) in plants grown in the field. The rate of C¹⁴ translocation was highest when plants were kept in the dark after ¹⁴CO₂ feeding. In general, total translocation of C¹⁴labeled compound from the source leaf was higher in watermelon than in tomato plants. For both watermelon and tomato, most field-grown plants showed a higher rate of C¹⁴ translocation as compared to greenhouse grown plants for a given period of time.
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