Atmospheric Fluoride: Its Uptake and Distribution in Tomato and Corn Plants.

InvestigationofSO2EffectsonRubber Trees as a Means of Forestalling InjurytoMalayan PlantationsfromRefinery Emissions

“…Here it can be seen that while composite samples or older leaf samples did not lose measurable amounts of sulfur on being washed for two minutes, there was a considerable loss in sulfur in the washed younger leaves (up to 30%). This is in accordance with results obtained by Leone, et al, 10 relative to hydrogen fluoride absorption in tomato and corn and indicates that sulfur is less firmly attached to young leaves than to old.…”

Effects of hydrogen fluoride on production and organic reserves of bean seed

“…This in turn depends on both the concentrations of HF to which the tissues have been exposed and the length of the exposures. For although some fluoride may be inactivated within plant tissue and some may be lost from the tissue after once being absorbed (Leone et al, 1956;Jacobson et al, 1966), fluoride intrinsically is an accumulative phytotoxicant. Therefore, to produce the same effects with short-term HF treatments as were obtained in the long-term fumigations, appreciably higher HF concentrations probably would be required.…”

Effects of Fluoride on Agriculture

“…At high fluoride concentrations, there is less chlorotic flecking and a greater tendency for tip, marginal, and interveinal necrosis, or a transverse necrotic band at the arch of the leaf. 16 ' 20 ' 21 On sorghum foliage, necrosis is often accompanied by a red coloration. 20 Ponderosa pine needles first exhibit a lightening in color which turns light brown to reddish-brown at the tip and progresses basipetally.…”