Uptake of triadimenol through wheat caryopsis after application by seed treatment

Abstract

The uptake of triadimenol was investigated by offering radio‐labelled chemical exclusively through the caryopsis in a special experimental design with single seed grains in plexiglass holders. In totally‐treated caryopses about 5% and, in partially‐treated caryopses (embryo untreated), 4.5% of the applied radioactivity reached the winter wheat shoots after 21 days up to the third leaf stage. Uptake of active ingredient through the pathway pericarp‐testa‐endosperm‐scutellum‐seedling up to the third leaf stage D(13) was therefore confirmed. Furthermore, [14C] triadimenol was also translocated through the caryopses into the roots and was released to the nutrient solution.

Uptake and translocation of imidacloprid, clothianidin and flupyradifurone in seed‐treated soybeans

“…The majority of the absorbed radioactivity is present in the cotyledons or treated portion of the plant and decreases in newer leaf tissues . Plant exposure pathways to insecticides include seed‐coat permeability across the seed surface, root absorption and uptake through the coleoptile, all with translocation to the plant shoots . Further, the neonicotinoids are translocated through the xylem tissues to the plant and display acropetal movement to leaf margins and interveinal spaces …”

Triticonazole Distribution in Dressed Corn Caryopsis and Seedlings

“…The content of the newly formed organs was 2.5 times lower. In wheat seeds, the triticonazole distribution differs, due to the presence of a particular tissue, the testa, which played the role of a filter during the imbibition phase (Thiebert et al, 1986(Thiebert et al, , 1988. At day 6, the whole triticonazole content of the germinating seed represented 48% of the initial deposit on the seed.…”

Aqueous pathways dominate permeation of solutes across Pisum sativum seed coats and mediate solute transport via diffusion and bulk flow of water

“…The uptake of water across the seed coat is essential for seed swelling (imbibition) and germination. The passage of solutes across the seed coat of mature seeds in the soil is critical in many processes like the uptake or release of germination inhibitors (Evenari 1949;Börner 1960;Friedman & Waller 1983a,b;Debeaujon, Léon-Kloosterziel & Koornneef 2000;Iqbal & Fry 2012), leaching of low molecular weight metabolites or sugars (Simon & Raja Harun 1972;Simon 1973;Powell & Matthews 1981;Werker 1997) or the uptake of seed treatment agrochemicals from the immediate vicinity of the seed in the soil (Thielert et al 1988;Stevens et al 2008).…”