ISHS Acta Horticulturae 239: VI International Symposium on Growth Regulators in Fruit Production
TRANSPORT AND ACCUMULATION OF PACLOBUTRAZOL IN PEACH SEEDLINGS |
| Authors: | J.D. Early, G.C. Martin |
| Abstract:
Peach seedlings were grown for 9 days in nutrient solutions containing 100 ppb of 14C-paclobutrazol. Paclobutrazol (PBZ) was readily taken up and transported throughout the plants. Total 14C activity was distributed predominantly between roots and leaves. However, the concentration of 14C activity (14C dpm mg-1 fresh wt) was highest in leaves and relatively uniform throughout the remainder of the plant. This pattern is consistent with the idea that PBZ is transported via the xylem. Additionally, microautoradiographs of the transport tissues showed that 14C activity was associated exclusively with the xylem. Though relatively stable in the nutrient solution, 14C-PBZ breakdown was rapid in the plants. Breakdown of 14C-PBZ was highest in the most physiologically active areas of the plant, the leaves and the young stem. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
