Uptake and fate of triticonazole applied as seed treatment to spring wheat ( Triticum aestivum L.)
✍ Scribed by Quérou, Rodolphe; Euvrard, Michel; Gauvrit, Christian
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 249 KB
- Volume
- 53
- Category
- Article
- ISSN
- 1526-498X
No coin nor oath required. For personal study only.
✦ Synopsis
Following seed treatment of wheat (T riticum aestivum L.) with 14Clabelled triticonazole at a dose of 1É8 g kg~1 seed, the uptake of radioactivity by shoots and roots was investigated from the two-to three-leaf stage up to the beginning of the booting phase, 80 days after sowing. Triticonazole equivalents taken up by wheat plants reached 5É7% and 14É6% of the applied dose in the shoots and the roots, respectively. Between the two-to three-leaf stage and the beginning of the booting phase, the concentration of triticonazole equivalents in the shoots decreased from 2É5 to 0É15 lg g~1 fresh weight. This was attributed to uptake of triticonazole by roots not keeping pace with shoot growth and increased retention in the roots of triticonazole taken up. The main factor limiting the uptake of triticonazole by the roots may be the rapid growth of the uptake-active apical root parts out of the dressing zone which had formed in the soil. Distribution of triticonazole equivalents taken up by the main shoot showed a decreasing concentration gradient from the oldest to the youngest leaf. An increase in the seed treatment dose was investigated as a way to increase the concentration of triticonazole in the shoots, but its inÑuence remained limited.