| Autor: |
McWhorter, C. G., Jordan, T. N. |
| Předmět: |
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| Zdroj: |
Physiologia Plantarum; 1976, Vol. 38 Issue 3, p166-170, 5p |
| Abstrakt: |
The factors affecting the absorption and translocation of 14C-dalapon (2.2-dichloropropionic acid) in johnsongrass were studied. Johnsongrass | Sorghum halepense (L.) Pers.| was first pot-grown in a greenhouse and then treated and placed in controlled-environment chambers. Absorption of 14C-dalapon into johnsongrass leaves and subsequent translocation occurred continuously within the plant during a 48-h period after treatment. Gas chromatographic analysis of johnsongrass extracts showed that the dalapon molecule was translocated intact. Absorption and translocation of 14C-dalapon increased as the droplet volume of the diluent was increased from 0.2 to 5.0 μl per treated spot. At 21 and 32°C, translocation of 14C-dalapon from a 2-cm treated leaf section into the plant was greater at 100% than at 35% relative humidity. At 38°C, translocation was greater at 35% than at 100% relative humidity. The addition of 0.5% surfactant to the dalapon solution increased translocation under all environmental conditions studied. The addition of 0.1 M KH2. PO4 to dalapon-surfactant solutions increased 14C-dalapon translocation under high temperature (38°C), especially at 35% relative humidity. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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